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r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c=\"function\"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error(\"Cannot find module '\"+i+\"'\");throw a.code=\"MODULE_NOT_FOUND\",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u=\"function\"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()","/*\n * classList.js: Cross-browser full element.classList implementation.\n * 1.1.20170427\n *\n * By Eli Grey, http://eligrey.com\n * License: Dedicated to the public domain.\n *   See https://github.com/eligrey/classList.js/blob/master/LICENSE.md\n */\n\n/*global self, document, DOMException */\n\n/*! @source http://purl.eligrey.com/github/classList.js/blob/master/classList.js */\n\nif (\"document\" in window.self) {\n\n// Full polyfill for browsers with no classList support\n// Including IE < Edge missing SVGElement.classList\nif (!(\"classList\" in document.createElement(\"_\")) \n\t|| document.createElementNS && !(\"classList\" in document.createElementNS(\"http://www.w3.org/2000/svg\",\"g\"))) {\n\n(function (view) {\n\n\"use strict\";\n\nif (!('Element' in view)) return;\n\nvar\n\t  classListProp = \"classList\"\n\t, protoProp = \"prototype\"\n\t, elemCtrProto = view.Element[protoProp]\n\t, objCtr = Object\n\t, strTrim = String[protoProp].trim || function () {\n\t\treturn this.replace(/^\\s+|\\s+$/g, \"\");\n\t}\n\t, arrIndexOf = Array[protoProp].indexOf || function (item) {\n\t\tvar\n\t\t\t  i = 0\n\t\t\t, len = this.length\n\t\t;\n\t\tfor (; i < len; i++) {\n\t\t\tif (i in this && this[i] === item) {\n\t\t\t\treturn i;\n\t\t\t}\n\t\t}\n\t\treturn -1;\n\t}\n\t// Vendors: please allow content code to instantiate DOMExceptions\n\t, DOMEx = function (type, message) {\n\t\tthis.name = type;\n\t\tthis.code = DOMException[type];\n\t\tthis.message = message;\n\t}\n\t, checkTokenAndGetIndex = function (classList, token) {\n\t\tif (token === \"\") {\n\t\t\tthrow new DOMEx(\n\t\t\t\t  \"SYNTAX_ERR\"\n\t\t\t\t, \"An invalid or illegal string was specified\"\n\t\t\t);\n\t\t}\n\t\tif (/\\s/.test(token)) {\n\t\t\tthrow new DOMEx(\n\t\t\t\t  \"INVALID_CHARACTER_ERR\"\n\t\t\t\t, \"String contains an invalid character\"\n\t\t\t);\n\t\t}\n\t\treturn arrIndexOf.call(classList, token);\n\t}\n\t, ClassList = function (elem) {\n\t\tvar\n\t\t\t  trimmedClasses = strTrim.call(elem.getAttribute(\"class\") || \"\")\n\t\t\t, classes = trimmedClasses ? trimmedClasses.split(/\\s+/) : []\n\t\t\t, i = 0\n\t\t\t, len = classes.length\n\t\t;\n\t\tfor (; i < len; i++) {\n\t\t\tthis.push(classes[i]);\n\t\t}\n\t\tthis._updateClassName = function () {\n\t\t\telem.setAttribute(\"class\", this.toString());\n\t\t};\n\t}\n\t, classListProto = ClassList[protoProp] = []\n\t, classListGetter = function () {\n\t\treturn new ClassList(this);\n\t}\n;\n// Most DOMException implementations don't allow calling DOMException's toString()\n// on non-DOMExceptions. Error's toString() is sufficient here.\nDOMEx[protoProp] = Error[protoProp];\nclassListProto.item = function (i) {\n\treturn this[i] || null;\n};\nclassListProto.contains = function (token) {\n\ttoken += \"\";\n\treturn checkTokenAndGetIndex(this, token) !== -1;\n};\nclassListProto.add = function () {\n\tvar\n\t\t  tokens = arguments\n\t\t, i = 0\n\t\t, l = tokens.length\n\t\t, token\n\t\t, updated = false\n\t;\n\tdo {\n\t\ttoken = tokens[i] + \"\";\n\t\tif (checkTokenAndGetIndex(this, token) === -1) {\n\t\t\tthis.push(token);\n\t\t\tupdated = true;\n\t\t}\n\t}\n\twhile (++i < l);\n\n\tif (updated) {\n\t\tthis._updateClassName();\n\t}\n};\nclassListProto.remove = function () {\n\tvar\n\t\t  tokens = arguments\n\t\t, i = 0\n\t\t, l = tokens.length\n\t\t, token\n\t\t, updated = false\n\t\t, index\n\t;\n\tdo {\n\t\ttoken = tokens[i] + \"\";\n\t\tindex = checkTokenAndGetIndex(this, token);\n\t\twhile (index !== -1) {\n\t\t\tthis.splice(index, 1);\n\t\t\tupdated = true;\n\t\t\tindex = checkTokenAndGetIndex(this, token);\n\t\t}\n\t}\n\twhile (++i < l);\n\n\tif (updated) {\n\t\tthis._updateClassName();\n\t}\n};\nclassListProto.toggle = function (token, force) {\n\ttoken += \"\";\n\n\tvar\n\t\t  result = this.contains(token)\n\t\t, method = result ?\n\t\t\tforce !== true && \"remove\"\n\t\t:\n\t\t\tforce !== false && \"add\"\n\t;\n\n\tif (method) {\n\t\tthis[method](token);\n\t}\n\n\tif (force === true || force === false) {\n\t\treturn force;\n\t} else {\n\t\treturn !result;\n\t}\n};\nclassListProto.toString = function () {\n\treturn this.join(\" \");\n};\n\nif (objCtr.defineProperty) {\n\tvar classListPropDesc = {\n\t\t  get: classListGetter\n\t\t, enumerable: true\n\t\t, configurable: true\n\t};\n\ttry {\n\t\tobjCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);\n\t} catch (ex) { // IE 8 doesn't support enumerable:true\n\t\t// adding undefined to fight this issue https://github.com/eligrey/classList.js/issues/36\n\t\t// modernie IE8-MSW7 machine has IE8 8.0.6001.18702 and is affected\n\t\tif (ex.number === undefined || ex.number === -0x7FF5EC54) {\n\t\t\tclassListPropDesc.enumerable = false;\n\t\t\tobjCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);\n\t\t}\n\t}\n} else if (objCtr[protoProp].__defineGetter__) {\n\telemCtrProto.__defineGetter__(classListProp, classListGetter);\n}\n\n}(window.self));\n\n}\n\n// There is full or partial native classList support, so just check if we need\n// to normalize the add/remove and toggle APIs.\n\n(function () {\n\t\"use strict\";\n\n\tvar testElement = document.createElement(\"_\");\n\n\ttestElement.classList.add(\"c1\", \"c2\");\n\n\t// Polyfill for IE 10/11 and Firefox <26, where classList.add and\n\t// classList.remove exist but support only one argument at a time.\n\tif (!testElement.classList.contains(\"c2\")) {\n\t\tvar createMethod = function(method) {\n\t\t\tvar original = DOMTokenList.prototype[method];\n\n\t\t\tDOMTokenList.prototype[method] = function(token) {\n\t\t\t\tvar i, len = arguments.length;\n\n\t\t\t\tfor (i = 0; i < len; i++) {\n\t\t\t\t\ttoken = arguments[i];\n\t\t\t\t\toriginal.call(this, token);\n\t\t\t\t}\n\t\t\t};\n\t\t};\n\t\tcreateMethod('add');\n\t\tcreateMethod('remove');\n\t}\n\n\ttestElement.classList.toggle(\"c3\", false);\n\n\t// Polyfill for IE 10 and Firefox <24, where classList.toggle does not\n\t// support the second argument.\n\tif (testElement.classList.contains(\"c3\")) {\n\t\tvar _toggle = DOMTokenList.prototype.toggle;\n\n\t\tDOMTokenList.prototype.toggle = function(token, force) {\n\t\t\tif (1 in arguments && !this.contains(token) === !force) {\n\t\t\t\treturn force;\n\t\t\t} else {\n\t\t\t\treturn _toggle.call(this, token);\n\t\t\t}\n\t\t};\n\n\t}\n\n\ttestElement = null;\n}());\n\n}\n","/*!\n  * domready (c) Dustin Diaz 2014 - License MIT\n  */\n!function (name, definition) {\n\n  if (typeof module != 'undefined') module.exports = definition()\n  else if (typeof define == 'function' && typeof define.amd == 'object') define(definition)\n  else this[name] = definition()\n\n}('domready', function () {\n\n  var fns = [], listener\n    , doc = document\n    , hack = doc.documentElement.doScroll\n    , domContentLoaded = 'DOMContentLoaded'\n    , loaded = (hack ? /^loaded|^c/ : /^loaded|^i|^c/).test(doc.readyState)\n\n\n  if (!loaded)\n  doc.addEventListener(domContentLoaded, listener = function () {\n    doc.removeEventListener(domContentLoaded, listener)\n    loaded = 1\n    while (listener = fns.shift()) listener()\n  })\n\n  return function (fn) {\n    loaded ? setTimeout(fn, 0) : fns.push(fn)\n  }\n\n});\n","'use strict';\n\n// <3 Modernizr\n// https://raw.githubusercontent.com/Modernizr/Modernizr/master/feature-detects/dom/dataset.js\n\nfunction useNative() {\n\tvar elem = document.createElement('div');\n\telem.setAttribute('data-a-b', 'c');\n\n\treturn Boolean(elem.dataset && elem.dataset.aB === 'c');\n}\n\nfunction nativeDataset(element) {\n\treturn element.dataset;\n}\n\nmodule.exports = useNative() ? nativeDataset : function (element) {\n\tvar map = {};\n\tvar attributes = element.attributes;\n\n\tfunction getter() {\n\t\treturn this.value;\n\t}\n\n\tfunction setter(name, value) {\n\t\tif (typeof value === 'undefined') {\n\t\t\tthis.removeAttribute(name);\n\t\t} else {\n\t\t\tthis.setAttribute(name, value);\n\t\t}\n\t}\n\n\tfor (var i = 0, j = attributes.length; i < j; i++) {\n\t\tvar attribute = attributes[i];\n\n\t\tif (attribute) {\n\t\t\tvar name = attribute.name;\n\n\t\t\tif (name.indexOf('data-') === 0) {\n\t\t\t\tvar prop = name.slice(5).replace(/-./g, function (u) {\n\t\t\t\t\treturn u.charAt(1).toUpperCase();\n\t\t\t\t});\n\n\t\t\t\tvar value = attribute.value;\n\n\t\t\t\tObject.defineProperty(map, prop, {\n\t\t\t\t\tenumerable: true,\n\t\t\t\t\tget: getter.bind({ value: value || '' }),\n\t\t\t\t\tset: setter.bind(element, name)\n\t\t\t\t});\n\t\t\t}\n\t\t}\n\t}\n\n\treturn map;\n};\n\n","// element-closest | CC0-1.0 | github.com/jonathantneal/closest\n\n(function (ElementProto) {\n\tif (typeof ElementProto.matches !== 'function') {\n\t\tElementProto.matches = ElementProto.msMatchesSelector || ElementProto.mozMatchesSelector || ElementProto.webkitMatchesSelector || function matches(selector) {\n\t\t\tvar element = this;\n\t\t\tvar elements = (element.document || element.ownerDocument).querySelectorAll(selector);\n\t\t\tvar index = 0;\n\n\t\t\twhile (elements[index] && elements[index] !== element) {\n\t\t\t\t++index;\n\t\t\t}\n\n\t\t\treturn Boolean(elements[index]);\n\t\t};\n\t}\n\n\tif (typeof ElementProto.closest !== 'function') {\n\t\tElementProto.closest = function closest(selector) {\n\t\t\tvar element = this;\n\n\t\t\twhile (element && element.nodeType === 1) {\n\t\t\t\tif (element.matches(selector)) {\n\t\t\t\t\treturn element;\n\t\t\t\t}\n\n\t\t\t\telement = element.parentNode;\n\t\t\t}\n\n\t\t\treturn null;\n\t\t};\n\t}\n})(window.Element.prototype);\n","/* global define, KeyboardEvent, module */\n\n(function () {\n\n  var keyboardeventKeyPolyfill = {\n    polyfill: polyfill,\n    keys: {\n      3: 'Cancel',\n      6: 'Help',\n      8: 'Backspace',\n      9: 'Tab',\n      12: 'Clear',\n      13: 'Enter',\n      16: 'Shift',\n      17: 'Control',\n      18: 'Alt',\n      19: 'Pause',\n      20: 'CapsLock',\n      27: 'Escape',\n      28: 'Convert',\n      29: 'NonConvert',\n      30: 'Accept',\n      31: 'ModeChange',\n      32: ' ',\n      33: 'PageUp',\n      34: 'PageDown',\n      35: 'End',\n      36: 'Home',\n      37: 'ArrowLeft',\n      38: 'ArrowUp',\n      39: 'ArrowRight',\n      40: 'ArrowDown',\n      41: 'Select',\n      42: 'Print',\n      43: 'Execute',\n      44: 'PrintScreen',\n      45: 'Insert',\n      46: 'Delete',\n      48: ['0', ')'],\n      49: ['1', '!'],\n      50: ['2', '@'],\n      51: ['3', '#'],\n      52: ['4', '$'],\n      53: ['5', '%'],\n      54: ['6', '^'],\n      55: ['7', '&'],\n      56: ['8', '*'],\n      57: ['9', '('],\n      91: 'OS',\n      93: 'ContextMenu',\n      144: 'NumLock',\n      145: 'ScrollLock',\n      181: 'VolumeMute',\n      182: 'VolumeDown',\n      183: 'VolumeUp',\n      186: [';', ':'],\n      187: ['=', '+'],\n      188: [',', '<'],\n      189: ['-', '_'],\n      190: ['.', '>'],\n      191: ['/', '?'],\n      192: ['`', '~'],\n      219: ['[', '{'],\n      220: ['\\\\', '|'],\n      221: [']', '}'],\n      222: [\"'\", '\"'],\n      224: 'Meta',\n      225: 'AltGraph',\n      246: 'Attn',\n      247: 'CrSel',\n      248: 'ExSel',\n      249: 'EraseEof',\n      250: 'Play',\n      251: 'ZoomOut'\n    }\n  };\n\n  // Function keys (F1-24).\n  var i;\n  for (i = 1; i < 25; i++) {\n    keyboardeventKeyPolyfill.keys[111 + i] = 'F' + i;\n  }\n\n  // Printable ASCII characters.\n  var letter = '';\n  for (i = 65; i < 91; i++) {\n    letter = String.fromCharCode(i);\n    keyboardeventKeyPolyfill.keys[i] = [letter.toLowerCase(), letter.toUpperCase()];\n  }\n\n  function polyfill () {\n    if (!('KeyboardEvent' in window) ||\n        'key' in KeyboardEvent.prototype) {\n      return false;\n    }\n\n    // Polyfill `key` on `KeyboardEvent`.\n    var proto = {\n      get: function (x) {\n        var key = keyboardeventKeyPolyfill.keys[this.which || this.keyCode];\n\n        if (Array.isArray(key)) {\n          key = key[+this.shiftKey];\n        }\n\n        return key;\n      }\n    };\n    Object.defineProperty(KeyboardEvent.prototype, 'key', proto);\n    return proto;\n  }\n\n  if (typeof define === 'function' && define.amd) {\n    define('keyboardevent-key-polyfill', keyboardeventKeyPolyfill);\n  } else if (typeof exports !== 'undefined' && typeof module !== 'undefined') {\n    module.exports = keyboardeventKeyPolyfill;\n  } else if (window) {\n    window.keyboardeventKeyPolyfill = keyboardeventKeyPolyfill;\n  }\n\n})();\n","/**\n * lodash (Custom Build) <https://lodash.com/>\n * Build: `lodash modularize exports=\"npm\" -o ./`\n * Copyright jQuery Foundation and other contributors <https://jquery.org/>\n * Released under MIT license <https://lodash.com/license>\n * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>\n * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors\n */\n\n/** Used as the `TypeError` message for \"Functions\" methods. */\nvar FUNC_ERROR_TEXT = 'Expected a function';\n\n/** Used as references for various `Number` constants. */\nvar NAN = 0 / 0;\n\n/** `Object#toString` result references. */\nvar symbolTag = '[object Symbol]';\n\n/** Used to match leading and trailing whitespace. */\nvar reTrim = /^\\s+|\\s+$/g;\n\n/** Used to detect bad signed hexadecimal string values. */\nvar reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n/** Used to detect binary string values. */\nvar reIsBinary = /^0b[01]+$/i;\n\n/** Used to detect octal string values. */\nvar reIsOctal = /^0o[0-7]+$/i;\n\n/** Built-in method references without a dependency on `root`. */\nvar freeParseInt = parseInt;\n\n/** Detect free variable `global` from Node.js. */\nvar freeGlobal = typeof global == 'object' && global && global.Object === Object && global;\n\n/** Detect free variable `self`. */\nvar freeSelf = typeof self == 'object' && self && self.Object === Object && self;\n\n/** Used as a reference to the global object. */\nvar root = freeGlobal || freeSelf || Function('return this')();\n\n/** Used for built-in method references. */\nvar objectProto = Object.prototype;\n\n/**\n * Used to resolve the\n * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)\n * of values.\n */\nvar objectToString = objectProto.toString;\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeMax = Math.max,\n    nativeMin = Math.min;\n\n/**\n * Gets the timestamp of the number of milliseconds that have elapsed since\n * the Unix epoch (1 January 1970 00:00:00 UTC).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Date\n * @returns {number} Returns the timestamp.\n * @example\n *\n * _.defer(function(stamp) {\n *   console.log(_.now() - stamp);\n * }, _.now());\n * // => Logs the number of milliseconds it took for the deferred invocation.\n */\nvar now = function() {\n  return root.Date.now();\n};\n\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked. The debounced function comes with a `cancel` method to cancel\n * delayed `func` invocations and a `flush` method to immediately invoke them.\n * Provide `options` to indicate whether `func` should be invoked on the\n * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n * with the last arguments provided to the debounced function. Subsequent\n * calls to the debounced function return the result of the last `func`\n * invocation.\n *\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\n * invoked on the trailing edge of the timeout only if the debounced function\n * is invoked more than once during the `wait` timeout.\n *\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n *\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n * for details over the differences between `_.debounce` and `_.throttle`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to debounce.\n * @param {number} [wait=0] The number of milliseconds to delay.\n * @param {Object} [options={}] The options object.\n * @param {boolean} [options.leading=false]\n *  Specify invoking on the leading edge of the timeout.\n * @param {number} [options.maxWait]\n *  The maximum time `func` is allowed to be delayed before it's invoked.\n * @param {boolean} [options.trailing=true]\n *  Specify invoking on the trailing edge of the timeout.\n * @returns {Function} Returns the new debounced function.\n * @example\n *\n * // Avoid costly calculations while the window size is in flux.\n * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n *\n * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n * jQuery(element).on('click', _.debounce(sendMail, 300, {\n *   'leading': true,\n *   'trailing': false\n * }));\n *\n * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n * var source = new EventSource('/stream');\n * jQuery(source).on('message', debounced);\n *\n * // Cancel the trailing debounced invocation.\n * jQuery(window).on('popstate', debounced.cancel);\n */\nfunction debounce(func, wait, options) {\n  var lastArgs,\n      lastThis,\n      maxWait,\n      result,\n      timerId,\n      lastCallTime,\n      lastInvokeTime = 0,\n      leading = false,\n      maxing = false,\n      trailing = true;\n\n  if (typeof func != 'function') {\n    throw new TypeError(FUNC_ERROR_TEXT);\n  }\n  wait = toNumber(wait) || 0;\n  if (isObject(options)) {\n    leading = !!options.leading;\n    maxing = 'maxWait' in options;\n    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n    trailing = 'trailing' in options ? !!options.trailing : trailing;\n  }\n\n  function invokeFunc(time) {\n    var args = lastArgs,\n        thisArg = lastThis;\n\n    lastArgs = lastThis = undefined;\n    lastInvokeTime = time;\n    result = func.apply(thisArg, args);\n    return result;\n  }\n\n  function leadingEdge(time) {\n    // Reset any `maxWait` timer.\n    lastInvokeTime = time;\n    // Start the timer for the trailing edge.\n    timerId = setTimeout(timerExpired, wait);\n    // Invoke the leading edge.\n    return leading ? invokeFunc(time) : result;\n  }\n\n  function remainingWait(time) {\n    var timeSinceLastCall = time - lastCallTime,\n        timeSinceLastInvoke = time - lastInvokeTime,\n        result = wait - timeSinceLastCall;\n\n    return maxing ? nativeMin(result, maxWait - timeSinceLastInvoke) : result;\n  }\n\n  function shouldInvoke(time) {\n    var timeSinceLastCall = time - lastCallTime,\n        timeSinceLastInvoke = time - lastInvokeTime;\n\n    // Either this is the first call, activity has stopped and we're at the\n    // trailing edge, the system time has gone backwards and we're treating\n    // it as the trailing edge, or we've hit the `maxWait` limit.\n    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\n      (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\n  }\n\n  function timerExpired() {\n    var time = now();\n    if (shouldInvoke(time)) {\n      return trailingEdge(time);\n    }\n    // Restart the timer.\n    timerId = setTimeout(timerExpired, remainingWait(time));\n  }\n\n  function trailingEdge(time) {\n    timerId = undefined;\n\n    // Only invoke if we have `lastArgs` which means `func` has been\n    // debounced at least once.\n    if (trailing && lastArgs) {\n      return invokeFunc(time);\n    }\n    lastArgs = lastThis = undefined;\n    return result;\n  }\n\n  function cancel() {\n    if (timerId !== undefined) {\n      clearTimeout(timerId);\n    }\n    lastInvokeTime = 0;\n    lastArgs = lastCallTime = lastThis = timerId = undefined;\n  }\n\n  function flush() {\n    return timerId === undefined ? result : trailingEdge(now());\n  }\n\n  function debounced() {\n    var time = now(),\n        isInvoking = shouldInvoke(time);\n\n    lastArgs = arguments;\n    lastThis = this;\n    lastCallTime = time;\n\n    if (isInvoking) {\n      if (timerId === undefined) {\n        return leadingEdge(lastCallTime);\n      }\n      if (maxing) {\n        // Handle invocations in a tight loop.\n        timerId = setTimeout(timerExpired, wait);\n        return invokeFunc(lastCallTime);\n      }\n    }\n    if (timerId === undefined) {\n      timerId = setTimeout(timerExpired, wait);\n    }\n    return result;\n  }\n  debounced.cancel = cancel;\n  debounced.flush = flush;\n  return debounced;\n}\n\n/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n  var type = typeof value;\n  return !!value && (type == 'object' || type == 'function');\n}\n\n/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n  return !!value && typeof value == 'object';\n}\n\n/**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\nfunction isSymbol(value) {\n  return typeof value == 'symbol' ||\n    (isObjectLike(value) && objectToString.call(value) == symbolTag);\n}\n\n/**\n * Converts `value` to a number.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n * @example\n *\n * _.toNumber(3.2);\n * // => 3.2\n *\n * _.toNumber(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toNumber(Infinity);\n * // => Infinity\n *\n * _.toNumber('3.2');\n * // => 3.2\n */\nfunction toNumber(value) {\n  if (typeof value == 'number') {\n    return value;\n  }\n  if (isSymbol(value)) {\n    return NAN;\n  }\n  if (isObject(value)) {\n    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n    value = isObject(other) ? (other + '') : other;\n  }\n  if (typeof value != 'string') {\n    return value === 0 ? value : +value;\n  }\n  value = value.replace(reTrim, '');\n  var isBinary = reIsBinary.test(value);\n  return (isBinary || reIsOctal.test(value))\n    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n    : (reIsBadHex.test(value) ? NAN : +value);\n}\n\nmodule.exports = debounce;\n","/*\nobject-assign\n(c) Sindre Sorhus\n@license MIT\n*/\n\n'use strict';\n/* eslint-disable no-unused-vars */\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar propIsEnumerable = Object.prototype.propertyIsEnumerable;\n\nfunction toObject(val) {\n\tif (val === null || val === undefined) {\n\t\tthrow new TypeError('Object.assign cannot be called with null or undefined');\n\t}\n\n\treturn Object(val);\n}\n\nfunction shouldUseNative() {\n\ttry {\n\t\tif (!Object.assign) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Detect buggy property enumeration order in older V8 versions.\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=4118\n\t\tvar test1 = new String('abc');  // eslint-disable-line no-new-wrappers\n\t\ttest1[5] = 'de';\n\t\tif (Object.getOwnPropertyNames(test1)[0] === '5') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test2 = {};\n\t\tfor (var i = 0; i < 10; i++) {\n\t\t\ttest2['_' + String.fromCharCode(i)] = i;\n\t\t}\n\t\tvar order2 = Object.getOwnPropertyNames(test2).map(function (n) {\n\t\t\treturn test2[n];\n\t\t});\n\t\tif (order2.join('') !== '0123456789') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test3 = {};\n\t\t'abcdefghijklmnopqrst'.split('').forEach(function (letter) {\n\t\t\ttest3[letter] = letter;\n\t\t});\n\t\tif (Object.keys(Object.assign({}, test3)).join('') !==\n\t\t\t\t'abcdefghijklmnopqrst') {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t} catch (err) {\n\t\t// We don't expect any of the above to throw, but better to be safe.\n\t\treturn false;\n\t}\n}\n\nmodule.exports = shouldUseNative() ? Object.assign : function (target, source) {\n\tvar from;\n\tvar to = toObject(target);\n\tvar symbols;\n\n\tfor (var s = 1; s < arguments.length; s++) {\n\t\tfrom = Object(arguments[s]);\n\n\t\tfor (var key in from) {\n\t\t\tif (hasOwnProperty.call(from, key)) {\n\t\t\t\tto[key] = from[key];\n\t\t\t}\n\t\t}\n\n\t\tif (getOwnPropertySymbols) {\n\t\t\tsymbols = getOwnPropertySymbols(from);\n\t\t\tfor (var i = 0; i < symbols.length; i++) {\n\t\t\t\tif (propIsEnumerable.call(from, symbols[i])) {\n\t\t\t\t\tto[symbols[i]] = from[symbols[i]];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn to;\n};\n","const assign = require('object-assign');\nconst delegate = require('../delegate');\nconst delegateAll = require('../delegateAll');\n\nconst DELEGATE_PATTERN = /^(.+):delegate\\((.+)\\)$/;\nconst SPACE = ' ';\n\nconst getListeners = function(type, handler) {\n  var match = type.match(DELEGATE_PATTERN);\n  var selector;\n  if (match) {\n    type = match[1];\n    selector = match[2];\n  }\n\n  var options;\n  if (typeof handler === 'object') {\n    options = {\n      capture: popKey(handler, 'capture'),\n      passive: popKey(handler, 'passive')\n    };\n  }\n\n  var listener = {\n    selector: selector,\n    delegate: (typeof handler === 'object')\n      ? delegateAll(handler)\n      : selector\n        ? delegate(selector, handler)\n        : handler,\n    options: options\n  };\n\n  if (type.indexOf(SPACE) > -1) {\n    return type.split(SPACE).map(function(_type) {\n      return assign({type: _type}, listener);\n    });\n  } else {\n    listener.type = type;\n    return [listener];\n  }\n};\n\nvar popKey = function(obj, key) {\n  var value = obj[key];\n  delete obj[key];\n  return value;\n};\n\nmodule.exports = function behavior(events, props) {\n  const listeners = Object.keys(events)\n    .reduce(function(memo, type) {\n      var listeners = getListeners(type, events[type]);\n      return memo.concat(listeners);\n    }, []);\n\n  return assign({\n    add: function addBehavior(element) {\n      listeners.forEach(function(listener) {\n        element.addEventListener(\n          listener.type,\n          listener.delegate,\n          listener.options\n        );\n      });\n    },\n    remove: function removeBehavior(element) {\n      listeners.forEach(function(listener) {\n        element.removeEventListener(\n          listener.type,\n          listener.delegate,\n          listener.options\n        );\n      });\n    }\n  }, props);\n};\n","module.exports = function compose(functions) {\n  return function(e) {\n    return functions.some(function(fn) {\n      return fn.call(this, e) === false;\n    }, this);\n  };\n};\n","// polyfill Element.prototype.closest\nrequire('element-closest');\n\nmodule.exports = function delegate(selector, fn) {\n  return function delegation(event) {\n    var target = event.target.closest(selector);\n    if (target) {\n      return fn.call(target, event);\n    }\n  }\n};\n","const delegate = require('../delegate');\nconst compose = require('../compose');\n\nconst SPLAT = '*';\n\nmodule.exports = function delegateAll(selectors) {\n  const keys = Object.keys(selectors)\n\n  // XXX optimization: if there is only one handler and it applies to\n  // all elements (the \"*\" CSS selector), then just return that\n  // handler\n  if (keys.length === 1 && keys[0] === SPLAT) {\n    return selectors[SPLAT];\n  }\n\n  const delegates = keys.reduce(function(memo, selector) {\n    memo.push(delegate(selector, selectors[selector]));\n    return memo;\n  }, []);\n  return compose(delegates);\n};\n","module.exports = function ignore(element, fn) {\n  return function ignorance(e) {\n    if (element !== e.target && !element.contains(e.target)) {\n      return fn.call(this, e);\n    }\n  };\n};\n","module.exports = {\n  behavior:     require('./behavior'),\n  delegate:     require('./delegate'),\n  delegateAll:  require('./delegateAll'),\n  ignore:       require('./ignore'),\n  keymap:       require('./keymap'),\n};\n","require('keyboardevent-key-polyfill');\n\n// these are the only relevant modifiers supported on all platforms,\n// according to MDN:\n// <https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/getModifierState>\nconst MODIFIERS = {\n  'Alt':      'altKey',\n  'Control':  'ctrlKey',\n  'Ctrl':     'ctrlKey',\n  'Shift':    'shiftKey'\n};\n\nconst MODIFIER_SEPARATOR = '+';\n\nconst getEventKey = function(event, hasModifiers) {\n  var key = event.key;\n  if (hasModifiers) {\n    for (var modifier in MODIFIERS) {\n      if (event[MODIFIERS[modifier]] === true) {\n        key = [modifier, key].join(MODIFIER_SEPARATOR);\n      }\n    }\n  }\n  return key;\n};\n\nmodule.exports = function keymap(keys) {\n  const hasModifiers = Object.keys(keys).some(function(key) {\n    return key.indexOf(MODIFIER_SEPARATOR) > -1;\n  });\n  return function(event) {\n    var key = getEventKey(event, hasModifiers);\n    return [key, key.toLowerCase()]\n      .reduce(function(result, _key) {\n        if (_key in keys) {\n          result = keys[key].call(this, event);\n        }\n        return result;\n      }, undefined);\n  };\n};\n\nmodule.exports.MODIFIERS = MODIFIERS;\n","module.exports = function once(listener, options) {\n  var wrapped = function wrappedOnce(e) {\n    e.currentTarget.removeEventListener(e.type, wrapped, options);\n    return listener.call(this, e);\n  };\n  return wrapped;\n};\n\n","'use strict';\n\nvar RE_TRIM = /(^\\s+)|(\\s+$)/g;\nvar RE_SPLIT = /\\s+/;\n\nvar trim = String.prototype.trim\n  ? function(str) { return str.trim(); }\n  : function(str) { return str.replace(RE_TRIM, ''); };\n\nvar queryById = function(id) {\n  return this.querySelector('[id=\"' + id.replace(/\"/g, '\\\\\"') + '\"]');\n};\n\nmodule.exports = function resolveIds(ids, doc) {\n  if (typeof ids !== 'string') {\n    throw new Error('Expected a string but got ' + (typeof ids));\n  }\n\n  if (!doc) {\n    doc = window.document;\n  }\n\n  var getElementById = doc.getElementById\n    ? doc.getElementById.bind(doc)\n    : queryById.bind(doc);\n\n  ids = trim(ids).split(RE_SPLIT);\n\n  // XXX we can short-circuit here because trimming and splitting a\n  // string of just whitespace produces an array containing a single,\n  // empty string\n  if (ids.length === 1 && ids[0] === '') {\n    return [];\n  }\n\n  return ids\n    .map(function(id) {\n      var el = getElementById(id);\n      if (!el) {\n        throw new Error('no element with id: \"' + id + '\"');\n      }\n      return el;\n    });\n};\n","const select = require('../utils/select');\nconst behavior = require('../utils/behavior');\nconst toggle = require('../utils/toggle');\nconst isElementInViewport = require('../utils/is-in-viewport');\nconst { CLICK } = require('../events');\nconst { prefix: PREFIX } = require('../config');\n\nconst ACCORDION = `.${PREFIX}-accordion, .${PREFIX}-accordion--bordered`;\nconst BUTTON = `.${PREFIX}-accordion__button[aria-controls]`;\nconst EXPANDED = 'aria-expanded';\nconst MULTISELECTABLE = 'aria-multiselectable';\n\n/**\n * Get an Array of button elements belonging directly to the given\n * accordion element.\n * @param {HTMLElement} accordion\n * @return {array<HTMLButtonElement>}\n */\nconst getAccordionButtons = (accordion) => {\n  const buttons = select(BUTTON, accordion);\n\n  return buttons.filter(button => button.closest(ACCORDION) === accordion);\n};\n\n/**\n * Toggle a button's \"pressed\" state, optionally providing a target\n * state.\n *\n * @param {HTMLButtonElement} button\n * @param {boolean?} expanded If no state is provided, the current\n * state will be toggled (from false to true, and vice-versa).\n * @return {boolean} the resulting state\n */\nconst toggleButton = (button, expanded) => {\n  const accordion = button.closest(ACCORDION);\n  let safeExpanded = expanded;\n\n  if (!accordion) {\n    throw new Error(`${BUTTON} is missing outer ${ACCORDION}`);\n  }\n\n  safeExpanded = toggle(button, expanded);\n\n  // XXX multiselectable is opt-in, to preserve legacy behavior\n  const multiselectable = accordion.getAttribute(MULTISELECTABLE) === 'true';\n\n  if (safeExpanded && !multiselectable) {\n    getAccordionButtons(accordion).forEach((other) => {\n      if (other !== button) {\n        toggle(other, false);\n      }\n    });\n  }\n};\n\n/**\n * @param {HTMLButtonElement} button\n * @return {boolean} true\n */\nconst showButton = button => toggleButton(button, true);\n\n/**\n * @param {HTMLButtonElement} button\n * @return {boolean} false\n */\nconst hideButton = button => toggleButton(button, false);\n\nconst accordion = behavior({\n  [CLICK]: {\n    [BUTTON](event) {\n      event.preventDefault();\n\n      toggleButton(this);\n\n      if (this.getAttribute(EXPANDED) === 'true') {\n        // We were just expanded, but if another accordion was also just\n        // collapsed, we may no longer be in the viewport. This ensures\n        // that we are still visible, so the user isn't confused.\n        if (!isElementInViewport(this)) this.scrollIntoView();\n      }\n    },\n  },\n}, {\n  init(root) {\n    select(BUTTON, root).forEach((button) => {\n      const expanded = button.getAttribute(EXPANDED) === 'true';\n      toggleButton(button, expanded);\n    });\n  },\n  ACCORDION,\n  BUTTON,\n  show: showButton,\n  hide: hideButton,\n  toggle: toggleButton,\n  getButtons: getAccordionButtons,\n});\n\nmodule.exports = accordion;\n","const behavior = require('../utils/behavior');\nconst { CLICK } = require('../events');\nconst { prefix: PREFIX } = require('../config');\n\nconst HEADER = `.${PREFIX}-banner__header`;\nconst EXPANDED_CLASS = `${PREFIX}-banner__header--expanded`;\n\nconst toggleBanner = function toggleEl(event) {\n  event.preventDefault();\n  this.closest(HEADER).classList.toggle(EXPANDED_CLASS);\n};\n\nmodule.exports = behavior({\n  [CLICK]: {\n    [`${HEADER} [aria-controls]`]: toggleBanner,\n  },\n});\n","const debounce = require('lodash.debounce');\nconst behavior = require('../utils/behavior');\nconst select = require('../utils/select');\nconst { CLICK } = require('../events');\nconst { prefix: PREFIX } = require('../config');\n\nconst HIDDEN = 'hidden';\nconst SCOPE = `.${PREFIX}-footer--big`;\nconst NAV = `${SCOPE} nav`;\nconst BUTTON = `${NAV} .${PREFIX}-footer__primary-link`;\nconst COLLAPSIBLE = `.${PREFIX}-footer__primary-content--collapsible`;\n\nconst HIDE_MAX_WIDTH = 480;\nconst DEBOUNCE_RATE = 180;\n\nfunction showPanel() {\n  if (window.innerWidth < HIDE_MAX_WIDTH) {\n    const collapseEl = this.closest(COLLAPSIBLE);\n    collapseEl.classList.toggle(HIDDEN);\n\n    // NB: this *should* always succeed because the button\n    // selector is scoped to \".{prefix}-footer-big nav\"\n    const collapsibleEls = select(COLLAPSIBLE, collapseEl.closest(NAV));\n\n    collapsibleEls.forEach((el) => {\n      if (el !== collapseEl) {\n        el.classList.add(HIDDEN);\n      }\n    });\n  }\n}\n\nlet lastInnerWidth;\n\nconst resize = debounce(() => {\n  if (lastInnerWidth === window.innerWidth) return;\n  lastInnerWidth = window.innerWidth;\n  const hidden = window.innerWidth < HIDE_MAX_WIDTH;\n  select(COLLAPSIBLE).forEach(list => list.classList.toggle(HIDDEN, hidden));\n}, DEBOUNCE_RATE);\n\nmodule.exports = behavior({\n  [CLICK]: {\n    [BUTTON]: showPanel,\n  },\n}, {\n  // export for use elsewhere\n  HIDE_MAX_WIDTH,\n  DEBOUNCE_RATE,\n\n  init() {\n    resize();\n    window.addEventListener('resize', resize);\n  },\n\n  teardown() {\n    window.removeEventListener('resize', resize);\n  },\n});\n","const accordion = require('./accordion');\nconst banner = require('./banner');\nconst footer = require('./footer');\nconst navigation = require('./navigation');\nconst password = require('./password');\nconst search = require('./search');\nconst skipnav = require('./skipnav');\nconst validator = require('./validator');\n\nmodule.exports = {\n  accordion,\n  banner,\n  footer,\n  navigation,\n  password,\n  search,\n  skipnav,\n  validator,\n};\n","const behavior = require('../utils/behavior');\nconst select = require('../utils/select');\nconst toggle = require('../utils/toggle');\nconst FocusTrap = require('../utils/focus-trap');\nconst accordion = require('./accordion');\n\nconst { CLICK } = require('../events');\nconst { prefix: PREFIX } = require('../config');\n\nconst BODY = 'body';\nconst NAV = `.${PREFIX}-nav`;\nconst NAV_LINKS = `${NAV} a`;\nconst NAV_CONTROL = `button.${PREFIX}-nav__link`;\nconst OPENERS = `.${PREFIX}-menu-btn`;\nconst CLOSE_BUTTON = `.${PREFIX}-nav__close`;\nconst OVERLAY = `.${PREFIX}-overlay`;\nconst CLOSERS = `${CLOSE_BUTTON}, .${PREFIX}-overlay`;\nconst TOGGLES = [NAV, OVERLAY].join(', ');\n\nconst ACTIVE_CLASS = 'usa-js-mobile-nav--active';\nconst VISIBLE_CLASS = 'is-visible';\n\nlet navigation;\nlet navActive;\n\nconst isActive = () => document.body.classList.contains(ACTIVE_CLASS);\n\nconst toggleNav = (active) => {\n  const { body } = document;\n  const safeActive = typeof active === 'boolean' ? active : !isActive();\n\n  body.classList.toggle(ACTIVE_CLASS, safeActive);\n\n  select(TOGGLES).forEach(el => el.classList.toggle(VISIBLE_CLASS, safeActive));\n\n  navigation.focusTrap.update(safeActive);\n\n  const closeButton = body.querySelector(CLOSE_BUTTON);\n  const menuButton = body.querySelector(OPENERS);\n\n  if (safeActive && closeButton) {\n    // The mobile nav was just activated, so focus on the close button,\n    // which is just before all the nav elements in the tab order.\n    closeButton.focus();\n  } else if (!safeActive && document.activeElement === closeButton && menuButton) {\n    // The mobile nav was just deactivated, and focus was on the close\n    // button, which is no longer visible. We don't want the focus to\n    // disappear into the void, so focus on the menu button if it's\n    // visible (this may have been what the user was just focused on,\n    // if they triggered the mobile nav by mistake).\n    menuButton.focus();\n  }\n\n  return safeActive;\n};\n\nconst resize = () => {\n  const closer = document.body.querySelector(CLOSE_BUTTON);\n\n  if (isActive() && closer && closer.getBoundingClientRect().width === 0) {\n    // When the mobile nav is active, and the close box isn't visible,\n    // we know the user's viewport has been resized to be larger.\n    // Let's make the page state consistent by deactivating the mobile nav.\n    navigation.toggleNav.call(closer, false);\n  }\n};\n\nconst onMenuClose = () => navigation.toggleNav.call(navigation, false);\nconst hideActiveNavDropdown = () => {\n  toggle(navActive, false);\n  navActive = null;\n};\n\n\nnavigation = behavior({\n  [CLICK]: {\n    [NAV_CONTROL]() {\n      // If another nav is open, close it\n      if (navActive && navActive !== this) {\n        hideActiveNavDropdown();\n      }\n      // store a reference to the last clicked nav link element, so we\n      // can hide the dropdown if another element on the page is clicked\n      if (navActive) {\n        hideActiveNavDropdown();\n      } else {\n        navActive = this;\n        toggle(navActive, true);\n      }\n\n      // Do this so the event handler on the body doesn't fire\n      return false;\n    },\n    [BODY]() {\n      if (navActive) {\n        hideActiveNavDropdown();\n      }\n    },\n    [OPENERS]: toggleNav,\n    [CLOSERS]: toggleNav,\n    [NAV_LINKS]() {\n      // A navigation link has been clicked! We want to collapse any\n      // hierarchical navigation UI it's a part of, so that the user\n      // can focus on whatever they've just selected.\n\n      // Some navigation links are inside accordions; when they're\n      // clicked, we want to collapse those accordions.\n      const acc = this.closest(accordion.ACCORDION);\n\n      if (acc) {\n        accordion.getButtons(acc).forEach(btn => accordion.hide(btn));\n      }\n\n      // If the mobile navigation menu is active, we want to hide it.\n      if (isActive()) {\n        navigation.toggleNav.call(navigation, false);\n      }\n    },\n  },\n}, {\n  init(root) {\n    const trapContainer = root.querySelector(NAV);\n\n    if (trapContainer) {\n      navigation.focusTrap = FocusTrap(trapContainer, {\n        Escape: onMenuClose,\n      });\n    }\n\n    resize();\n    window.addEventListener('resize', resize, false);\n  },\n  teardown() {\n    window.removeEventListener('resize', resize, false);\n    navActive = false;\n  },\n  focusTrap: null,\n  toggleNav,\n});\n\nmodule.exports = navigation;\n","const behavior = require('../utils/behavior');\nconst toggleFormInput = require('../utils/toggle-form-input');\n\nconst { CLICK } = require('../events');\nconst { prefix: PREFIX } = require('../config');\n\nconst LINK = `.${PREFIX}-show-password, .${PREFIX}-show-multipassword`;\n\nfunction toggle(event) {\n  event.preventDefault();\n  toggleFormInput(this);\n}\n\nmodule.exports = behavior({\n  [CLICK]: {\n    [LINK]: toggle,\n  },\n});\n","const ignore = require('receptor/ignore');\nconst behavior = require('../utils/behavior');\nconst select = require('../utils/select');\n\nconst { CLICK } = require('../events');\n\nconst BUTTON = '.js-search-button';\nconst FORM = '.js-search-form';\nconst INPUT = '[type=search]';\nconst CONTEXT = 'header'; // XXX\n\nlet lastButton;\n\nconst getForm = (button) => {\n  const context = button.closest(CONTEXT);\n  return context\n    ? context.querySelector(FORM)\n    : document.querySelector(FORM);\n};\n\nconst toggleSearch = (button, active) => {\n  const form = getForm(button);\n\n  if (!form) {\n    throw new Error(`No ${FORM} found for search toggle in ${CONTEXT}!`);\n  }\n\n  /* eslint-disable no-param-reassign */\n  button.hidden = active;\n  form.hidden = !active;\n  /* eslint-enable */\n\n  if (!active) {\n    return;\n  }\n\n  const input = form.querySelector(INPUT);\n\n  if (input) {\n    input.focus();\n  }\n  // when the user clicks _outside_ of the form w/ignore(): hide the\n  // search, then remove the listener\n  const listener = ignore(form, () => {\n    if (lastButton) {\n      hideSearch.call(lastButton); // eslint-disable-line no-use-before-define\n    }\n\n    document.body.removeEventListener(CLICK, listener);\n  });\n\n  // Normally we would just run this code without a timeout, but\n  // IE11 and Edge will actually call the listener *immediately* because\n  // they are currently handling this exact type of event, so we'll\n  // make sure the browser is done handling the current click event,\n  // if any, before we attach the listener.\n  setTimeout(() => {\n    document.body.addEventListener(CLICK, listener);\n  }, 0);\n};\n\nfunction showSearch() {\n  toggleSearch(this, true);\n  lastButton = this;\n}\n\nfunction hideSearch() {\n  toggleSearch(this, false);\n  lastButton = undefined;\n}\n\nconst search = behavior({\n  [CLICK]: {\n    [BUTTON]: showSearch,\n  },\n}, {\n  init(target) {\n    select(BUTTON, target).forEach((button) => {\n      toggleSearch(button, false);\n    });\n  },\n  teardown() {\n    // forget the last button clicked\n    lastButton = undefined;\n  },\n});\n\nmodule.exports = search;\n","const once = require('receptor/once');\nconst behavior = require('../utils/behavior');\nconst { CLICK } = require('../events');\nconst { prefix: PREFIX } = require('../config');\n\nconst LINK = `.${PREFIX}-skipnav[href^=\"#\"], .${PREFIX}-footer__return-to-top [href^=\"#\"]`;\nconst MAINCONTENT = 'main-content';\n\nfunction setTabindex() {\n  // NB: we know because of the selector we're delegating to below that the\n  // href already begins with '#'\n  const id = this.getAttribute('href');\n  const target = document.getElementById((id === '#') ? MAINCONTENT : id.slice(1));\n\n  if (target) {\n    target.style.outline = '0';\n    target.setAttribute('tabindex', 0);\n    target.focus();\n    target.addEventListener('blur', once(() => {\n      target.setAttribute('tabindex', -1);\n    }));\n  } else {\n    // throw an error?\n  }\n}\n\nmodule.exports = behavior({\n  [CLICK]: {\n    [LINK]: setTabindex,\n  },\n});\n","const behavior = require('../utils/behavior');\nconst validate = require('../utils/validate-input');\n\nfunction change() {\n  validate(this);\n}\n\nconst validator = behavior({\n  'keyup change': {\n    'input[data-validation-element]': change,\n  },\n});\n\nmodule.exports = validator;\n","module.exports = {\n  prefix: 'usa',\n};\n","module.exports = {\n  // This used to be conditionally dependent on whether the\n  // browser supported touch events; if it did, `CLICK` was set to\n  // `touchstart`.  However, this had downsides:\n  //\n  // * It pre-empted mobile browsers' default behavior of detecting\n  //   whether a touch turned into a scroll, thereby preventing\n  //   users from using some of our components as scroll surfaces.\n  //\n  // * Some devices, such as the Microsoft Surface Pro, support *both*\n  //   touch and clicks. This meant the conditional effectively dropped\n  //   support for the user's mouse, frustrating users who preferred\n  //   it on those systems.\n  CLICK: 'click',\n};\n","\nconst elproto = window.HTMLElement.prototype;\nconst HIDDEN = 'hidden';\n\nif (!(HIDDEN in elproto)) {\n  Object.defineProperty(elproto, HIDDEN, {\n    get() {\n      return this.hasAttribute(HIDDEN);\n    },\n    set(value) {\n      if (value) {\n        this.setAttribute(HIDDEN, '');\n      } else {\n        this.removeAttribute(HIDDEN);\n      }\n    },\n  });\n}\n","\n// polyfills HTMLElement.prototype.classList and DOMTokenList\nrequire('classlist-polyfill');\n// polyfills HTMLElement.prototype.hidden\nrequire('./element-hidden');\n","\nconst domready = require('domready');\n\n/**\n * The 'polyfills' define key ECMAScript 5 methods that may be missing from\n * older browsers, so must be loaded first.\n */\nrequire('./polyfills');\n\nconst uswds = require('./config');\n\nconst components = require('./components');\n\nuswds.components = components;\n\ndomready(() => {\n  const target = document.body;\n  Object.keys(components)\n    .forEach((key) => {\n      const behavior = components[key];\n      behavior.on(target);\n    });\n});\n\nmodule.exports = uswds;\n","module.exports = (htmlDocument = document) => htmlDocument.activeElement;\n","const assign = require('object-assign');\nconst Behavior = require('receptor/behavior');\n\n/**\n * @name sequence\n * @param {...Function} seq an array of functions\n * @return { closure } callHooks\n */\n// We use a named function here because we want it to inherit its lexical scope\n// from the behavior props object, not from the module\nconst sequence = (...seq) => function callHooks(target = document.body) {\n  seq.forEach((method) => {\n    if (typeof this[method] === 'function') {\n      this[method].call(this, target);\n    }\n  });\n};\n\n/**\n * @name behavior\n * @param {object} events\n * @param {object?} props\n * @return {receptor.behavior}\n */\nmodule.exports = (events, props) => Behavior(events, assign({\n  on: sequence('init', 'add'),\n  off: sequence('teardown', 'remove'),\n}, props));\n","const assign = require('object-assign');\nconst { keymap } = require('receptor');\nconst behavior = require('./behavior');\nconst select = require('./select');\nconst activeElement = require('./active-element');\n\nconst FOCUSABLE = 'a[href], area[href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), button:not([disabled]), iframe, object, embed, [tabindex=\"0\"], [contenteditable]';\n\nconst tabHandler = (context) => {\n  const focusableElements = select(FOCUSABLE, context);\n  const firstTabStop = focusableElements[0];\n  const lastTabStop = focusableElements[focusableElements.length - 1];\n\n  // Special rules for when the user is tabbing forward from the last focusable element,\n  // or when tabbing backwards from the first focusable element\n  function tabAhead(event) {\n    if (activeElement() === lastTabStop) {\n      event.preventDefault();\n      firstTabStop.focus();\n    }\n  }\n\n  function tabBack(event) {\n    if (activeElement() === firstTabStop) {\n      event.preventDefault();\n      lastTabStop.focus();\n    }\n  }\n\n  return {\n    firstTabStop,\n    lastTabStop,\n    tabAhead,\n    tabBack,\n  };\n};\n\nmodule.exports = (context, additionalKeyBindings = {}) => {\n  const tabEventHandler = tabHandler(context);\n\n  //  TODO: In the future, loop over additional keybindings and pass an array\n  // of functions, if necessary, to the map keys. Then people implementing\n  // the focus trap could pass callbacks to fire when tabbing\n  const keyMappings = keymap(assign({\n    Tab: tabEventHandler.tabAhead,\n    'Shift+Tab': tabEventHandler.tabBack,\n  }, additionalKeyBindings));\n\n  const focusTrap = behavior({\n    keydown: keyMappings,\n  }, {\n    init() {\n      // TODO: is this desireable behavior? Should the trap always do this by default or should\n      // the component getting decorated handle this?\n      tabEventHandler.firstTabStop.focus();\n    },\n    update(isActive) {\n      if (isActive) {\n        this.on();\n      } else {\n        this.off();\n      }\n    },\n  });\n\n  return focusTrap;\n};\n","// https://stackoverflow.com/a/7557433\nfunction isElementInViewport(el, win = window,\n  docEl = document.documentElement) {\n  const rect = el.getBoundingClientRect();\n\n  return (\n    rect.top >= 0\n    && rect.left >= 0\n    && rect.bottom <= (win.innerHeight || docEl.clientHeight)\n    && rect.right <= (win.innerWidth || docEl.clientWidth)\n  );\n}\n\nmodule.exports = isElementInViewport;\n","\n\n/**\n * @name isElement\n * @desc returns whether or not the given argument is a DOM element.\n * @param {any} value\n * @return {boolean}\n */\nconst isElement = value => value && typeof value === 'object' && value.nodeType === 1;\n\n/**\n * @name select\n * @desc selects elements from the DOM by class selector or ID selector.\n * @param {string} selector - The selector to traverse the DOM with.\n * @param {Document|HTMLElement?} context - The context to traverse the DOM\n *   in. If not provided, it defaults to the document.\n * @return {HTMLElement[]} - An array of DOM nodes or an empty array.\n */\nmodule.exports = (selector, context) => {\n  if (typeof selector !== 'string') {\n    return [];\n  }\n\n  if (!context || !isElement(context)) {\n    context = window.document; // eslint-disable-line no-param-reassign\n  }\n\n  const selection = context.querySelectorAll(selector);\n  return Array.prototype.slice.call(selection);\n};\n","/**\n * Flips given INPUT elements between masked (hiding the field value) and unmasked\n * @param {Array.HTMLElement} fields - An array of INPUT elements\n * @param {Boolean} mask - Whether the mask should be applied, hiding the field value\n */\nmodule.exports = (field, mask) => {\n  field.setAttribute('autocapitalize', 'off');\n  field.setAttribute('autocorrect', 'off');\n  field.setAttribute('type', mask ? 'password' : 'text');\n};\n","const resolveIdRefs = require('resolve-id-refs');\nconst toggleFieldMask = require('./toggle-field-mask');\n\nconst CONTROLS = 'aria-controls';\nconst PRESSED = 'aria-pressed';\nconst SHOW_ATTR = 'data-show-text';\nconst HIDE_ATTR = 'data-hide-text';\n\n/**\n * Replace the word \"Show\" (or \"show\") with \"Hide\" (or \"hide\") in a string.\n * @param {string} showText\n * @return {strong} hideText\n */\nconst getHideText = showText => showText.replace(/\\bShow\\b/i, show => `${show[0] === 'S' ? 'H' : 'h'}ide`);\n\n/**\n * Component that decorates an HTML element with the ability to toggle the\n * masked state of an input field (like a password) when clicked.\n * The ids of the fields to be masked will be pulled directly from the button's\n * `aria-controls` attribute.\n *\n * @param  {HTMLElement} el    Parent element containing the fields to be masked\n * @return {boolean}\n */\nmodule.exports = (el) => {\n  // this is the *target* state:\n  // * if the element has the attr and it's !== \"true\", pressed is true\n  // * otherwise, pressed is false\n  const pressed = el.hasAttribute(PRESSED)\n    && el.getAttribute(PRESSED) !== 'true';\n\n  const fields = resolveIdRefs(el.getAttribute(CONTROLS));\n  fields.forEach(field => toggleFieldMask(field, pressed));\n\n  if (!el.hasAttribute(SHOW_ATTR)) {\n    el.setAttribute(SHOW_ATTR, el.textContent);\n  }\n\n  const showText = el.getAttribute(SHOW_ATTR);\n  const hideText = el.getAttribute(HIDE_ATTR) || getHideText(showText);\n\n  el.textContent = pressed ? showText : hideText; // eslint-disable-line no-param-reassign\n  el.setAttribute(PRESSED, pressed);\n  return pressed;\n};\n","const EXPANDED = 'aria-expanded';\nconst CONTROLS = 'aria-controls';\nconst HIDDEN = 'hidden';\n\nmodule.exports = (button, expanded) => {\n  let safeExpanded = expanded;\n\n  if (typeof safeExpanded !== 'boolean') {\n    safeExpanded = button.getAttribute(EXPANDED) === 'false';\n  }\n\n  button.setAttribute(EXPANDED, safeExpanded);\n\n  const id = button.getAttribute(CONTROLS);\n  const controls = document.getElementById(id);\n  if (!controls) {\n    throw new Error(`No toggle target found with id: \"${id}\"`);\n  }\n\n  if (safeExpanded) {\n    controls.removeAttribute(HIDDEN);\n  } else {\n    controls.setAttribute(HIDDEN, '');\n  }\n\n  return safeExpanded;\n};\n","\nconst dataset = require('elem-dataset');\n\nconst { prefix: PREFIX } = require('../config');\n\nconst CHECKED = 'aria-checked';\nconst CHECKED_CLASS = `${PREFIX}-checklist__item--checked`;\n\nmodule.exports = function validate(el) {\n  const data = dataset(el);\n  const id = data.validationElement;\n  const checkList = id.charAt(0) === '#'\n    ? document.querySelector(id)\n    : document.getElementById(id);\n\n  if (!checkList) {\n    throw new Error(`No validation element found with id: \"${id}\"`);\n  }\n\n  Object.entries(data).forEach(([key, value]) => {\n    if (key.startsWith('validate')) {\n      const validatorName = key.substr('validate'.length).toLowerCase();\n      const validatorPattern = new RegExp(value);\n      const validatorSelector = `[data-validator=\"${validatorName}\"]`;\n      const validatorCheckbox = checkList.querySelector(validatorSelector);\n\n      if (!validatorCheckbox) {\n        throw new Error(`No validator checkbox found for: \"${validatorName}\"`);\n      }\n\n      const checked = validatorPattern.test(el.value);\n      validatorCheckbox.classList.toggle(CHECKED_CLASS, checked);\n      validatorCheckbox.setAttribute(CHECKED, checked);\n    }\n  });\n};\n"]}