{"version":3,"sources":["jsdelivr-header.js","/npm/dialog-polyfill@0.4.10/dialog-polyfill.js"],"names":[],"mappings":"AAAA;AACA;AACA;AACA;AACA;AACA;AACA,CCNA,WAGE,IAAI,EAAqB,OAAO,YA2ChC,SAAS,EAAkB,GACzB,KAAO,GAAI,CACT,GAAqB,WAAjB,EAAG,UACL,OAAwC,EAE1C,EAAK,EAAG,aACV,CACA,OAAO,IACT,CASA,SAAS,EAAS,GACZ,GAAM,EAAG,MAAQ,IAAO,SAAS,MACnC,EAAG,MAEP,CAOA,SAAS,EAAW,EAAU,GAC5B,IAAK,IAAI,EAAI,EAAG,EAAI,EAAS,SAAU,EACrC,GAAI,EAAS,KAAO,EAClB,OAAO,EAGX,OAAO,CACT,CAMA,SAAS,EAAmB,GAC1B,SAAK,IAAO,EAAG,aAAa,YAGuB,WAA5C,EAAG,aAAa,UAAU,aACnC,CAMA,SAAS,EAAmB,GAkB1B,GAjBA,KAAK,QAAU,EACf,KAAK,mBAAoB,EACzB,KAAK,cAAe,EAGf,EAAO,aAAa,SACvB,EAAO,aAAa,OAAQ,UAG9B,EAAO,KAAO,KAAK,KAAK,KAAK,MAC7B,EAAO,UAAY,KAAK,UAAU,KAAK,MACvC,EAAO,MAAQ,KAAK,MAAM,KAAK,MAEzB,gBAAiB,IACrB,EAAO,YAAc,IAGnB,qBAAsB,OAAQ,CACvB,IAAI,iBAAiB,KAAK,eAAe,KAAK,OACpD,QAAQ,EAAQ,CAAC,YAAY,EAAM,gBAAiB,CAAC,SAC1D,KAAO,CAIL,IAKI,EALA,GAAU,EACV,EAAK,WACP,EAAU,KAAK,iBAAmB,KAAK,iBACvC,GAAU,CACZ,EAAE,KAAK,MAEH,EAAa,SAAS,GACxB,GAAI,EAAG,SAAW,EAAlB,CACA,IAAI,EAAO,iBACX,GAAY,EAAG,KAAK,OAAO,EAAG,MAAiB,EAC/C,OAAO,aAAa,GACpB,EAAU,OAAO,WAAW,EAAI,EAJI,CAKtC,EACA,CAAC,kBAAmB,iBAAkB,8BAA8B,SAAQ,SAAS,GACnF,EAAO,iBAAiB,EAAM,EAChC,GACF,CAIA,OAAO,eAAe,EAAQ,OAAQ,CACpC,IAAK,KAAK,QAAQ,KAAK,MACvB,IAAK,EAAO,aAAa,KAAK,EAAQ,UAGxC,KAAK,UAAY,SAAS,cAAc,OACxC,KAAK,UAAU,UAAY,WAC3B,KAAK,UAAU,iBAAiB,QAAS,KAAK,eAAe,KAAK,MACpE,CAnJK,GAAoD,iBAAvB,KAChC,EAAqB,SAAqB,EAAO,GAC/C,EAAI,GAAK,CAAC,EACV,IAAI,EAAK,SAAS,YAAY,eAE9B,OADA,EAAG,gBAAgB,IAAS,EAAE,UAAW,EAAE,WAAY,EAAE,QAAU,MAC5D,CACT,GACmB,UAAY,OAAO,MAAM,WA8I9C,EAAmB,UAAY,CAE7B,UAAI,GACF,OAAO,KAAK,OACd,EAOA,eAAgB,WACV,KAAK,QAAQ,aAAa,SAAW,SAAS,KAAK,SAAS,KAAK,UACrE,KAAK,gBACP,EAKA,eAAgB,WACT,KAAK,eACV,KAAK,cAAe,EACpB,KAAK,QAAQ,MAAM,OAAS,GAKxB,KAAK,oBACP,KAAK,QAAQ,MAAM,IAAM,GACzB,KAAK,mBAAoB,GAI3B,KAAK,UAAU,YAAc,KAAK,UAAU,WAAW,YAAY,KAAK,WACxE,EAAe,GAAG,aAAa,MACjC,EAKA,QAAS,SAAS,GACZ,EACF,KAAK,QAAQ,aAAa,SAAW,KAAK,QAAQ,aAAa,OAAQ,KAEvE,KAAK,QAAQ,gBAAgB,QAC7B,KAAK,iBAET,EAQA,eAAgB,SAAS,GACvB,GAAK,KAAK,QAAQ,aAAa,YAU7B,KAAK,QAAQ,YAV6B,CAI1C,IAAI,EAAO,SAAS,cAAc,OAClC,KAAK,QAAQ,aAAa,EAAM,KAAK,QAAQ,YAC7C,EAAK,UAAY,EACjB,EAAK,QACL,KAAK,QAAQ,YAAY,EAC3B,CAIA,IAAI,EAAkB,SAAS,YAAY,eAC3C,EAAgB,eAAe,EAAE,KAAM,EAAE,QAAS,EAAE,WAAY,OAC5D,EAAE,OAAQ,EAAE,QAAS,EAAE,QAAS,EAAE,QAAS,EAAE,QAAS,EAAE,QACxD,EAAE,OAAQ,EAAE,SAAU,EAAE,QAAS,EAAE,OAAQ,EAAE,eACjD,KAAK,QAAQ,cAAc,GAC3B,EAAE,iBACJ,EAMA,OAAQ,WAEN,IAAI,EAAS,KAAK,QAAQ,cAAc,+BAIxC,IAHK,GAAU,KAAK,QAAQ,UAAY,IACtC,EAAS,KAAK,UAEX,EAAQ,CAGX,IACI,EADO,CAAC,SAAU,QAAS,SAAU,SAAU,YAClC,KAAI,SAAS,GAC5B,OAAO,EAAK,kBACd,IAEA,EAAM,KAAK,iDACX,EAAS,KAAK,QAAQ,cAAc,EAAM,KAAK,MACjD,CACA,EAAS,SAAS,eAClB,GAAU,EAAO,OACnB,EAQA,aAAc,SAAS,EAAS,GAC9B,GAAI,EAAU,EACZ,MAAM,IAAI,MAAM,uCAElB,KAAK,QAAQ,MAAM,OAAS,EAC5B,KAAK,UAAU,MAAM,OAAS,CAChC,EAKA,KAAM,WACC,KAAK,QAAQ,OAChB,KAAK,SAAQ,GACb,KAAK,SAET,EAKA,UAAW,WACT,GAAI,KAAK,QAAQ,aAAa,QAC5B,MAAM,IAAI,MAAM,iHAElB,IAAK,SAAS,KAAK,SAAS,KAAK,SAC/B,MAAM,IAAI,MAAM,8EAElB,IAAK,EAAe,GAAG,WAAW,MAChC,MAAM,IAAI,MAAM,oFAhRtB,SAAgC,GAC9B,KAAO,GAAM,IAAO,SAAS,MAAM,CACjC,IAAI,EAAI,OAAO,iBAAiB,GAC5B,EAAU,SAAS,EAAG,GACxB,aAAkB,IAAT,EAAE,IAAoB,EAAE,KAAO,EAC1C,EACA,GAAI,EAAE,QAAU,GACZ,EAAQ,SAAU,SAClB,EAAQ,YAAa,SACrB,EAAQ,eAAgB,WACxB,EAAQ,SAAU,SAClB,EAAQ,cAAe,SACJ,YAAnB,EAAa,WACE,UAAf,EAAE,UAC4B,UAA9B,EAAE,wBACJ,OAAO,EAET,EAAK,EAAG,aACV,CACA,OAAO,CACT,EA+PQ,CAAuB,KAAK,QAAQ,gBACtC,QAAQ,KAAK,+LAKf,KAAK,SAAQ,GACb,KAAK,cAAe,EAGhB,EAAe,eAAe,KAAK,UACrC,EAAe,WAAW,KAAK,SAC/B,KAAK,mBAAoB,GAEzB,KAAK,mBAAoB,EAI3B,KAAK,QAAQ,WAAW,aAAa,KAAK,UAAW,KAAK,QAAQ,aAGlE,KAAK,QACP,EAQA,MAAO,SAAS,GACd,IAAK,KAAK,QAAQ,aAAa,QAC7B,MAAM,IAAI,MAAM,uHAElB,KAAK,SAAQ,QAGW,IAApB,IACF,KAAK,QAAQ,YAAc,GAI7B,IAAI,EAAa,IAAI,EAAmB,QAAS,CAC/C,SAAS,EACT,YAAY,IAEd,KAAK,QAAQ,cAAc,EAC7B,GAIF,IAAI,EAAiB,CAErB,WAA4B,SAAS,GACnC,IAAI,EAAY,SAAS,KAAK,WAAa,SAAS,gBAAgB,UAChE,EAAW,GAAa,OAAO,YAAc,EAAQ,cAAgB,EACzE,EAAQ,MAAM,IAAM,KAAK,IAAI,EAAW,GAAY,IACtD,EAEA,gCAAiD,SAAS,GACxD,IAAK,IAAI,EAAI,EAAG,EAAI,SAAS,YAAY,SAAU,EAAG,CACpD,IAAI,EAAa,SAAS,YAAY,GAClC,EAAW,KAEf,IACE,EAAW,EAAW,QACxB,CAAE,MAAO,GAAI,CACb,GAAK,EACL,IAAK,IAAI,EAAI,EAAG,EAAI,EAAS,SAAU,EAAG,CACxC,IAAI,EAAO,EAAS,GAChB,EAAgB,KAEpB,IACE,EAAgB,SAAS,iBAAiB,EAAK,aACjD,CAAE,MAAM,GAAI,CACZ,GAAK,GAAkB,EAAW,EAAe,GAAjD,CAGA,IAAI,EAAS,EAAK,MAAM,iBAAiB,OACrC,EAAY,EAAK,MAAM,iBAAiB,UAC5C,GAAK,GAAqB,SAAX,GAAuB,GAA2B,SAAd,EACjD,OAAO,CAJT,CAMF,CACF,CACA,OAAO,CACT,EAEA,eAAgC,SAAS,GAEvC,MAA+B,aADX,OAAO,iBAAiB,GAC1B,aAQQ,SAArB,EAAO,MAAM,KAAuC,KAArB,EAAO,MAAM,KACpB,SAAxB,EAAO,MAAM,QAA6C,KAAxB,EAAO,MAAM,UAG5C,EAAe,gCAAgC,GACzD,EAKA,oBAAqC,SAAS,GAK5C,IAJI,OAAO,mBAAqB,EAAQ,YACtC,QAAQ,KAAK,8EACiB,GAEN,WAAtB,EAAQ,UACV,MAAM,IAAI,MAAM,2DAElB,IAAI,EAAqD,EAC3D,EAKA,eAAgC,SAAS,GAClC,EAAQ,WACX,EAAe,oBAAoB,EAEvC,EAKA,cAA+B,WAE7B,KAAK,mBAAqB,GAE1B,IAAI,EAAW,KAAK,UAAU,KAAK,MAOnC,KAAK,QAAU,SAAS,cAAc,OACtC,KAAK,QAAQ,UAAY,kBACzB,KAAK,QAAQ,iBAAiB,QAAS,SAAS,GAC9C,KAAK,iBAAc,EACnB,EAAE,kBACF,EAAS,GACX,EAAE,KAAK,OAEP,KAAK,WAAa,KAAK,WAAW,KAAK,MACvC,KAAK,aAAe,KAAK,aAAa,KAAK,MAE3C,KAAK,WAAa,IAClB,KAAK,YAAc,OAEnB,KAAK,iBAAc,EAEf,qBAAsB,SACxB,KAAK,IAAM,IAAI,kBAAiB,SAAS,GACvC,IAAI,EAAU,GACd,EAAQ,SAAQ,SAAS,GACvB,IAAK,IAAW,EAAP,EAAI,EAAM,EAAI,EAAI,aAAa,KAAM,EACtC,aAAa,UAEQ,WAAhB,EAAE,WACX,EAAQ,KAAK,GAEf,EAAU,EAAQ,OAAO,EAAE,iBAAiB,WAEhD,IACA,EAAQ,QAAU,EAAS,EAC7B,IAEJ,GAkKA,GA5JA,EAAe,cAAc,UAAU,cAAgB,WACrD,SAAS,gBAAgB,iBAAiB,QAAS,KAAK,cAAc,GACtE,SAAS,iBAAiB,UAAW,KAAK,YAC1C,KAAK,KAAO,KAAK,IAAI,QAAQ,SAAU,CAAC,WAAW,EAAM,SAAS,GACpE,EAMA,EAAe,cAAc,UAAU,gBAAkB,WACvD,SAAS,gBAAgB,oBAAoB,QAAS,KAAK,cAAc,GACzE,SAAS,oBAAoB,UAAW,KAAK,YAC7C,KAAK,KAAO,KAAK,IAAI,YACvB,EAKA,EAAe,cAAc,UAAU,eAAiB,WAGtD,IAFA,IAEgB,EAFZ,EAAS,KAAK,YAET,EAAI,EAAQ,EAAM,KAAK,mBAAmB,KAAM,EACvD,EAAI,eAAe,IAAU,GACnB,IAAN,IACF,KAAK,QAAQ,MAAM,SAAW,GAKlC,IAAI,EAAO,KAAK,mBAAmB,GAC/B,GACM,EAAK,OAAO,YAAc,SAAS,MACzC,YAAY,KAAK,SACV,KAAK,QAAQ,YACtB,KAAK,QAAQ,WAAW,YAAY,KAAK,QAE7C,EAMA,EAAe,cAAc,UAAU,sBAAwB,SAAS,GACtE,KAAO,EAAY,EAAkB,IAAY,CAC/C,IAAK,IAAW,EAAP,EAAI,EAAQ,EAAM,KAAK,mBAAmB,KAAM,EACvD,GAAI,EAAI,SAAW,EACjB,OAAa,IAAN,EAGX,EAAY,EAAU,aACxB,CACA,OAAO,CACT,EAEA,EAAe,cAAc,UAAU,aAAe,SAAS,GAC7D,IAAI,KAAK,sBAAsB,EAAM,UAErC,EAAM,iBACN,EAAM,kBACN,EAAiC,EAAY,aAEpB,IAArB,KAAK,aAAT,CAEA,IAAI,EAAM,KAAK,mBAAmB,GAalC,OAZa,EAAI,OACK,wBAAwB,EAAM,QACrC,KAAK,8BACd,KAAK,YACP,EAAI,SAEJ,SAAS,gBAAgB,UAMtB,CAfuC,CAgBhD,EAEA,EAAe,cAAc,UAAU,WAAa,SAAS,GAE3D,GADA,KAAK,iBAAc,EACG,KAAlB,EAAM,QAAgB,CACxB,EAAM,iBACN,EAAM,kBACN,IAAI,EAAc,IAAI,EAAmB,SAAU,CACjD,SAAS,EACT,YAAY,IAEV,EAAM,KAAK,mBAAmB,GAC9B,GAAO,EAAI,OAAO,cAAc,IAClC,EAAI,OAAO,OAEf,MAA6B,IAAlB,EAAM,UACf,KAAK,aAAe,EAAM,SAE9B,EAQA,EAAe,cAAc,UAAU,UAAY,SAAS,GAI9C,KAAK,mBAAmB,QAC9B,SAAQ,SAAS,IACgB,IAAjC,EAAQ,QAAQ,EAAI,QACtB,EAAI,iBAEJ,EAAI,gBAER,GACF,EAMA,EAAe,cAAc,UAAU,WAAa,SAAS,GAC3D,IAAI,GAAW,KAAK,YAAc,KAAK,YAAc,EAAI,EACzD,QAAI,KAAK,mBAAmB,QAAU,KAGO,IAAzC,KAAK,mBAAmB,QAAQ,IAClC,KAAK,gBAEP,KAAK,kBACE,EACT,EAKA,EAAe,cAAc,UAAU,aAAe,SAAS,GAC7D,IAAI,EAAQ,KAAK,mBAAmB,QAAQ,IAC7B,IAAX,IAEJ,KAAK,mBAAmB,OAAO,EAAO,GACC,IAAnC,KAAK,mBAAmB,QAC1B,KAAK,kBAEP,KAAK,iBACP,EAEA,EAAe,GAAK,IAAI,EAAe,cACvC,EAAe,cAAgB,KAC/B,EAAe,SAAW,UAMO,IAA7B,OAAO,kBAAiC,CAM1C,IAAI,EAAW,SAAS,cAAc,QAEtC,GADA,EAAS,aAAa,SAAU,UACR,WAApB,EAAS,OAAqB,CAChC,IAAI,EAAmB,OAAO,yBAAyB,gBAAgB,UAAW,UAClF,GAAI,EAAkB,CAGpB,IAAI,EAAU,EAAiB,IAC/B,EAAiB,IAAM,WACrB,OAAI,EAAmB,MACd,SAEF,EAAQ,KAAK,KACtB,EACA,IAAI,EAAU,EAAiB,IAC/B,EAAiB,IAAM,SAAS,GAC9B,MAAiB,iBAAN,GAAsC,WAApB,EAAE,cACtB,KAAK,aAAa,SAAU,GAE9B,EAAQ,KAAK,KAAM,EAC5B,EACA,OAAO,eAAe,gBAAgB,UAAW,SAAU,EAC7D,CACF,CAOA,SAAS,iBAAiB,SAAS,SAAS,GAG1C,GAFA,EAAe,cAAgB,KAC/B,EAAe,SAAW,MACtB,EAAG,iBAAP,CAEA,IAAI,EAAiC,EAAS,OAC9C,GAAK,GAAW,EAAmB,EAAO,MAA1C,CAGA,KAD6B,WAAhB,EAAO,MAAqB,CAAC,SAAU,SAAS,QAAQ,EAAO,YAAc,GAC9E,CACV,GAA2B,UAArB,EAAO,WAAyC,UAAhB,EAAO,KAAqB,OAElE,EAAe,SAAW,EAAG,QAAU,IAAM,EAAG,OAClD,CAEa,EAAkB,KAG/B,EAAe,cAAgB,EAZ4B,CAHxB,CAgBrC,IAAG,GAMH,IAAI,EAAmB,gBAAgB,UAAU,OAQjD,gBAAgB,UAAU,OAPE,WAC1B,IAAK,EAAmB,MACtB,OAAO,EAAiB,KAAK,MAE/B,IAAI,EAAS,EAAkB,MAC/B,GAAU,EAAO,OACnB,EAOA,SAAS,iBAAiB,UAAU,SAAS,GAC3C,IAAI,EAAuC,EAAS,OACpD,GAAK,EAAmB,GAAxB,CACA,EAAG,iBAEH,IAAI,EAAS,EAAkB,GAC/B,GAAK,EAAL,CAIA,IAAI,EAAI,EAAe,cACnB,GAAK,EAAE,OAAS,EAClB,EAAO,MAAM,EAAe,UAAY,EAAE,OAE1C,EAAO,QAET,EAAe,cAAgB,IAVR,CAJkB,CAe3C,IAAG,EACL,CAEA,EAAoC,oBAAI,EAAe,oBACvD,EAA+B,eAAI,EAAe,eAE5B,mBAAX,QAAyB,QAAS,OAE3C,QAAO,WAAa,OAAO,CAAgB,IAChB,iBAAX,QAAoD,iBAAtB,OAAgB,QAE9D,OAAgB,QAAI,EAGpB,OAAuB,eAAI,CAE9B,CAjuBD","file":"/npm/dialog-polyfill@0.4.10/dialog-polyfill.js","sourceRoot":"","sourcesContent":["/**\n * Minified by jsDelivr using Terser v5.37.0.\n * Original file: /npm/dialog-polyfill@0.4.10/dialog-polyfill.js\n *\n * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files\n */\n","(function() {\n\n // nb. This is for IE10 and lower _only_.\n var supportCustomEvent = window.CustomEvent;\n if (!supportCustomEvent || typeof supportCustomEvent === 'object') {\n supportCustomEvent = function CustomEvent(event, x) {\n x = x || {};\n var ev = document.createEvent('CustomEvent');\n ev.initCustomEvent(event, !!x.bubbles, !!x.cancelable, x.detail || null);\n return ev;\n };\n supportCustomEvent.prototype = window.Event.prototype;\n }\n\n /**\n * @param {Element} el to check for stacking context\n * @return {boolean} whether this el or its parents creates a stacking context\n */\n function createsStackingContext(el) {\n while (el && el !== document.body) {\n var s = window.getComputedStyle(el);\n var invalid = function(k, ok) {\n return !(s[k] === undefined || s[k] === ok);\n }\n if (s.opacity < 1 ||\n invalid('zIndex', 'auto') ||\n invalid('transform', 'none') ||\n invalid('mixBlendMode', 'normal') ||\n invalid('filter', 'none') ||\n invalid('perspective', 'none') ||\n s['isolation'] === 'isolate' ||\n s.position === 'fixed' ||\n s.webkitOverflowScrolling === 'touch') {\n return true;\n }\n el = el.parentElement;\n }\n return false;\n }\n\n /**\n * Finds the nearest from the passed element.\n *\n * @param {Element} el to search from\n * @return {HTMLDialogElement} dialog found\n */\n function findNearestDialog(el) {\n while (el) {\n if (el.localName === 'dialog') {\n return /** @type {HTMLDialogElement} */ (el);\n }\n el = el.parentElement;\n }\n return null;\n }\n\n /**\n * Blur the specified element, as long as it's not the HTML body element.\n * This works around an IE9/10 bug - blurring the body causes Windows to\n * blur the whole application.\n *\n * @param {Element} el to blur\n */\n function safeBlur(el) {\n if (el && el.blur && el !== document.body) {\n el.blur();\n }\n }\n\n /**\n * @param {!NodeList} nodeList to search\n * @param {Node} node to find\n * @return {boolean} whether node is inside nodeList\n */\n function inNodeList(nodeList, node) {\n for (var i = 0; i < nodeList.length; ++i) {\n if (nodeList[i] === node) {\n return true;\n }\n }\n return false;\n }\n\n /**\n * @param {HTMLFormElement} el to check\n * @return {boolean} whether this form has method=\"dialog\"\n */\n function isFormMethodDialog(el) {\n if (!el || !el.hasAttribute('method')) {\n return false;\n }\n return el.getAttribute('method').toLowerCase() === 'dialog';\n }\n\n /**\n * @param {!HTMLDialogElement} dialog to upgrade\n * @constructor\n */\n function dialogPolyfillInfo(dialog) {\n this.dialog_ = dialog;\n this.replacedStyleTop_ = false;\n this.openAsModal_ = false;\n\n // Set a11y role. Browsers that support dialog implicitly know this already.\n if (!dialog.hasAttribute('role')) {\n dialog.setAttribute('role', 'dialog');\n }\n\n dialog.show = this.show.bind(this);\n dialog.showModal = this.showModal.bind(this);\n dialog.close = this.close.bind(this);\n\n if (!('returnValue' in dialog)) {\n dialog.returnValue = '';\n }\n\n if ('MutationObserver' in window) {\n var mo = new MutationObserver(this.maybeHideModal.bind(this));\n mo.observe(dialog, {attributes: true, attributeFilter: ['open']});\n } else {\n // IE10 and below support. Note that DOMNodeRemoved etc fire _before_ removal. They also\n // seem to fire even if the element was removed as part of a parent removal. Use the removed\n // events to force downgrade (useful if removed/immediately added).\n var removed = false;\n var cb = function() {\n removed ? this.downgradeModal() : this.maybeHideModal();\n removed = false;\n }.bind(this);\n var timeout;\n var delayModel = function(ev) {\n if (ev.target !== dialog) { return; } // not for a child element\n var cand = 'DOMNodeRemoved';\n removed |= (ev.type.substr(0, cand.length) === cand);\n window.clearTimeout(timeout);\n timeout = window.setTimeout(cb, 0);\n };\n ['DOMAttrModified', 'DOMNodeRemoved', 'DOMNodeRemovedFromDocument'].forEach(function(name) {\n dialog.addEventListener(name, delayModel);\n });\n }\n // Note that the DOM is observed inside DialogManager while any dialog\n // is being displayed as a modal, to catch modal removal from the DOM.\n\n Object.defineProperty(dialog, 'open', {\n set: this.setOpen.bind(this),\n get: dialog.hasAttribute.bind(dialog, 'open')\n });\n\n this.backdrop_ = document.createElement('div');\n this.backdrop_.className = 'backdrop';\n this.backdrop_.addEventListener('click', this.backdropClick_.bind(this));\n }\n\n dialogPolyfillInfo.prototype = {\n\n get dialog() {\n return this.dialog_;\n },\n\n /**\n * Maybe remove this dialog from the modal top layer. This is called when\n * a modal dialog may no longer be tenable, e.g., when the dialog is no\n * longer open or is no longer part of the DOM.\n */\n maybeHideModal: function() {\n if (this.dialog_.hasAttribute('open') && document.body.contains(this.dialog_)) { return; }\n this.downgradeModal();\n },\n\n /**\n * Remove this dialog from the modal top layer, leaving it as a non-modal.\n */\n downgradeModal: function() {\n if (!this.openAsModal_) { return; }\n this.openAsModal_ = false;\n this.dialog_.style.zIndex = '';\n\n // This won't match the native exactly because if the user set top on a centered\n // polyfill dialog, that top gets thrown away when the dialog is closed. Not sure it's\n // possible to polyfill this perfectly.\n if (this.replacedStyleTop_) {\n this.dialog_.style.top = '';\n this.replacedStyleTop_ = false;\n }\n\n // Clear the backdrop and remove from the manager.\n this.backdrop_.parentNode && this.backdrop_.parentNode.removeChild(this.backdrop_);\n dialogPolyfill.dm.removeDialog(this);\n },\n\n /**\n * @param {boolean} value whether to open or close this dialog\n */\n setOpen: function(value) {\n if (value) {\n this.dialog_.hasAttribute('open') || this.dialog_.setAttribute('open', '');\n } else {\n this.dialog_.removeAttribute('open');\n this.maybeHideModal(); // nb. redundant with MutationObserver\n }\n },\n\n /**\n * Handles clicks on the fake .backdrop element, redirecting them as if\n * they were on the dialog itself.\n *\n * @param {!Event} e to redirect\n */\n backdropClick_: function(e) {\n if (!this.dialog_.hasAttribute('tabindex')) {\n // Clicking on the backdrop should move the implicit cursor, even if dialog cannot be\n // focused. Create a fake thing to focus on. If the backdrop was _before_ the dialog, this\n // would not be needed - clicks would move the implicit cursor there.\n var fake = document.createElement('div');\n this.dialog_.insertBefore(fake, this.dialog_.firstChild);\n fake.tabIndex = -1;\n fake.focus();\n this.dialog_.removeChild(fake);\n } else {\n this.dialog_.focus();\n }\n\n var redirectedEvent = document.createEvent('MouseEvents');\n redirectedEvent.initMouseEvent(e.type, e.bubbles, e.cancelable, window,\n e.detail, e.screenX, e.screenY, e.clientX, e.clientY, e.ctrlKey,\n e.altKey, e.shiftKey, e.metaKey, e.button, e.relatedTarget);\n this.dialog_.dispatchEvent(redirectedEvent);\n e.stopPropagation();\n },\n\n /**\n * Focuses on the first focusable element within the dialog. This will always blur the current\n * focus, even if nothing within the dialog is found.\n */\n focus_: function() {\n // Find element with `autofocus` attribute, or fall back to the first form/tabindex control.\n var target = this.dialog_.querySelector('[autofocus]:not([disabled])');\n if (!target && this.dialog_.tabIndex >= 0) {\n target = this.dialog_;\n }\n if (!target) {\n // Note that this is 'any focusable area'. This list is probably not exhaustive, but the\n // alternative involves stepping through and trying to focus everything.\n var opts = ['button', 'input', 'keygen', 'select', 'textarea'];\n var query = opts.map(function(el) {\n return el + ':not([disabled])';\n });\n // TODO(samthor): tabindex values that are not numeric are not focusable.\n query.push('[tabindex]:not([disabled]):not([tabindex=\"\"])'); // tabindex != \"\", not disabled\n target = this.dialog_.querySelector(query.join(', '));\n }\n safeBlur(document.activeElement);\n target && target.focus();\n },\n\n /**\n * Sets the zIndex for the backdrop and dialog.\n *\n * @param {number} dialogZ\n * @param {number} backdropZ\n */\n updateZIndex: function(dialogZ, backdropZ) {\n if (dialogZ < backdropZ) {\n throw new Error('dialogZ should never be < backdropZ');\n }\n this.dialog_.style.zIndex = dialogZ;\n this.backdrop_.style.zIndex = backdropZ;\n },\n\n /**\n * Shows the dialog. If the dialog is already open, this does nothing.\n */\n show: function() {\n if (!this.dialog_.open) {\n this.setOpen(true);\n this.focus_();\n }\n },\n\n /**\n * Show this dialog modally.\n */\n showModal: function() {\n if (this.dialog_.hasAttribute('open')) {\n throw new Error('Failed to execute \\'showModal\\' on dialog: The element is already open, and therefore cannot be opened modally.');\n }\n if (!document.body.contains(this.dialog_)) {\n throw new Error('Failed to execute \\'showModal\\' on dialog: The element is not in a Document.');\n }\n if (!dialogPolyfill.dm.pushDialog(this)) {\n throw new Error('Failed to execute \\'showModal\\' on dialog: There are too many open modal dialogs.');\n }\n\n if (createsStackingContext(this.dialog_.parentElement)) {\n console.warn('A dialog is being shown inside a stacking context. ' +\n 'This may cause it to be unusable. For more information, see this link: ' +\n 'https://github.com/GoogleChrome/dialog-polyfill/#stacking-context');\n }\n\n this.setOpen(true);\n this.openAsModal_ = true;\n\n // Optionally center vertically, relative to the current viewport.\n if (dialogPolyfill.needsCentering(this.dialog_)) {\n dialogPolyfill.reposition(this.dialog_);\n this.replacedStyleTop_ = true;\n } else {\n this.replacedStyleTop_ = false;\n }\n\n // Insert backdrop.\n this.dialog_.parentNode.insertBefore(this.backdrop_, this.dialog_.nextSibling);\n\n // Focus on whatever inside the dialog.\n this.focus_();\n },\n\n /**\n * Closes this HTMLDialogElement. This is optional vs clearing the open\n * attribute, however this fires a 'close' event.\n *\n * @param {string=} opt_returnValue to use as the returnValue\n */\n close: function(opt_returnValue) {\n if (!this.dialog_.hasAttribute('open')) {\n throw new Error('Failed to execute \\'close\\' on dialog: The element does not have an \\'open\\' attribute, and therefore cannot be closed.');\n }\n this.setOpen(false);\n\n // Leave returnValue untouched in case it was set directly on the element\n if (opt_returnValue !== undefined) {\n this.dialog_.returnValue = opt_returnValue;\n }\n\n // Triggering \"close\" event for any attached listeners on the .\n var closeEvent = new supportCustomEvent('close', {\n bubbles: false,\n cancelable: false\n });\n this.dialog_.dispatchEvent(closeEvent);\n }\n\n };\n\n var dialogPolyfill = {};\n\n dialogPolyfill.reposition = function(element) {\n var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;\n var topValue = scrollTop + (window.innerHeight - element.offsetHeight) / 2;\n element.style.top = Math.max(scrollTop, topValue) + 'px';\n };\n\n dialogPolyfill.isInlinePositionSetByStylesheet = function(element) {\n for (var i = 0; i < document.styleSheets.length; ++i) {\n var styleSheet = document.styleSheets[i];\n var cssRules = null;\n // Some browsers throw on cssRules.\n try {\n cssRules = styleSheet.cssRules;\n } catch (e) {}\n if (!cssRules) { continue; }\n for (var j = 0; j < cssRules.length; ++j) {\n var rule = cssRules[j];\n var selectedNodes = null;\n // Ignore errors on invalid selector texts.\n try {\n selectedNodes = document.querySelectorAll(rule.selectorText);\n } catch(e) {}\n if (!selectedNodes || !inNodeList(selectedNodes, element)) {\n continue;\n }\n var cssTop = rule.style.getPropertyValue('top');\n var cssBottom = rule.style.getPropertyValue('bottom');\n if ((cssTop && cssTop !== 'auto') || (cssBottom && cssBottom !== 'auto')) {\n return true;\n }\n }\n }\n return false;\n };\n\n dialogPolyfill.needsCentering = function(dialog) {\n var computedStyle = window.getComputedStyle(dialog);\n if (computedStyle.position !== 'absolute') {\n return false;\n }\n\n // We must determine whether the top/bottom specified value is non-auto. In\n // WebKit/Blink, checking computedStyle.top == 'auto' is sufficient, but\n // Firefox returns the used value. So we do this crazy thing instead: check\n // the inline style and then go through CSS rules.\n if ((dialog.style.top !== 'auto' && dialog.style.top !== '') ||\n (dialog.style.bottom !== 'auto' && dialog.style.bottom !== '')) {\n return false;\n }\n return !dialogPolyfill.isInlinePositionSetByStylesheet(dialog);\n };\n\n /**\n * @param {!Element} element to force upgrade\n */\n dialogPolyfill.forceRegisterDialog = function(element) {\n if (window.HTMLDialogElement || element.showModal) {\n console.warn('This browser already supports , the polyfill ' +\n 'may not work correctly', element);\n }\n if (element.localName !== 'dialog') {\n throw new Error('Failed to register dialog: The element is not a dialog.');\n }\n new dialogPolyfillInfo(/** @type {!HTMLDialogElement} */ (element));\n };\n\n /**\n * @param {!Element} element to upgrade, if necessary\n */\n dialogPolyfill.registerDialog = function(element) {\n if (!element.showModal) {\n dialogPolyfill.forceRegisterDialog(element);\n }\n };\n\n /**\n * @constructor\n */\n dialogPolyfill.DialogManager = function() {\n /** @type {!Array} */\n this.pendingDialogStack = [];\n\n var checkDOM = this.checkDOM_.bind(this);\n\n // The overlay is used to simulate how a modal dialog blocks the document.\n // The blocking dialog is positioned on top of the overlay, and the rest of\n // the dialogs on the pending dialog stack are positioned below it. In the\n // actual implementation, the modal dialog stacking is controlled by the\n // top layer, where z-index has no effect.\n this.overlay = document.createElement('div');\n this.overlay.className = '_dialog_overlay';\n this.overlay.addEventListener('click', function(e) {\n this.forwardTab_ = undefined;\n e.stopPropagation();\n checkDOM([]); // sanity-check DOM\n }.bind(this));\n\n this.handleKey_ = this.handleKey_.bind(this);\n this.handleFocus_ = this.handleFocus_.bind(this);\n\n this.zIndexLow_ = 100000;\n this.zIndexHigh_ = 100000 + 150;\n\n this.forwardTab_ = undefined;\n\n if ('MutationObserver' in window) {\n this.mo_ = new MutationObserver(function(records) {\n var removed = [];\n records.forEach(function(rec) {\n for (var i = 0, c; c = rec.removedNodes[i]; ++i) {\n if (!(c instanceof Element)) {\n continue;\n } else if (c.localName === 'dialog') {\n removed.push(c);\n }\n removed = removed.concat(c.querySelectorAll('dialog'));\n }\n });\n removed.length && checkDOM(removed);\n });\n }\n };\n\n /**\n * Called on the first modal dialog being shown. Adds the overlay and related\n * handlers.\n */\n dialogPolyfill.DialogManager.prototype.blockDocument = function() {\n document.documentElement.addEventListener('focus', this.handleFocus_, true);\n document.addEventListener('keydown', this.handleKey_);\n this.mo_ && this.mo_.observe(document, {childList: true, subtree: true});\n };\n\n /**\n * Called on the first modal dialog being removed, i.e., when no more modal\n * dialogs are visible.\n */\n dialogPolyfill.DialogManager.prototype.unblockDocument = function() {\n document.documentElement.removeEventListener('focus', this.handleFocus_, true);\n document.removeEventListener('keydown', this.handleKey_);\n this.mo_ && this.mo_.disconnect();\n };\n\n /**\n * Updates the stacking of all known dialogs.\n */\n dialogPolyfill.DialogManager.prototype.updateStacking = function() {\n var zIndex = this.zIndexHigh_;\n\n for (var i = 0, dpi; dpi = this.pendingDialogStack[i]; ++i) {\n dpi.updateZIndex(--zIndex, --zIndex);\n if (i === 0) {\n this.overlay.style.zIndex = --zIndex;\n }\n }\n\n // Make the overlay a sibling of the dialog itself.\n var last = this.pendingDialogStack[0];\n if (last) {\n var p = last.dialog.parentNode || document.body;\n p.appendChild(this.overlay);\n } else if (this.overlay.parentNode) {\n this.overlay.parentNode.removeChild(this.overlay);\n }\n };\n\n /**\n * @param {Element} candidate to check if contained or is the top-most modal dialog\n * @return {boolean} whether candidate is contained in top dialog\n */\n dialogPolyfill.DialogManager.prototype.containedByTopDialog_ = function(candidate) {\n while (candidate = findNearestDialog(candidate)) {\n for (var i = 0, dpi; dpi = this.pendingDialogStack[i]; ++i) {\n if (dpi.dialog === candidate) {\n return i === 0; // only valid if top-most\n }\n }\n candidate = candidate.parentElement;\n }\n return false;\n };\n\n dialogPolyfill.DialogManager.prototype.handleFocus_ = function(event) {\n if (this.containedByTopDialog_(event.target)) { return; }\n\n event.preventDefault();\n event.stopPropagation();\n safeBlur(/** @type {Element} */ (event.target));\n\n if (this.forwardTab_ === undefined) { return; } // move focus only from a tab key\n\n var dpi = this.pendingDialogStack[0];\n var dialog = dpi.dialog;\n var position = dialog.compareDocumentPosition(event.target);\n if (position & Node.DOCUMENT_POSITION_PRECEDING) {\n if (this.forwardTab_) { // forward\n dpi.focus_();\n } else { // backwards\n document.documentElement.focus();\n }\n } else {\n // TODO: Focus after the dialog, is ignored.\n }\n\n return false;\n };\n\n dialogPolyfill.DialogManager.prototype.handleKey_ = function(event) {\n this.forwardTab_ = undefined;\n if (event.keyCode === 27) {\n event.preventDefault();\n event.stopPropagation();\n var cancelEvent = new supportCustomEvent('cancel', {\n bubbles: false,\n cancelable: true\n });\n var dpi = this.pendingDialogStack[0];\n if (dpi && dpi.dialog.dispatchEvent(cancelEvent)) {\n dpi.dialog.close();\n }\n } else if (event.keyCode === 9) {\n this.forwardTab_ = !event.shiftKey;\n }\n };\n\n /**\n * Finds and downgrades any known modal dialogs that are no longer displayed. Dialogs that are\n * removed and immediately readded don't stay modal, they become normal.\n *\n * @param {!Array} removed that have definitely been removed\n */\n dialogPolyfill.DialogManager.prototype.checkDOM_ = function(removed) {\n // This operates on a clone because it may cause it to change. Each change also calls\n // updateStacking, which only actually needs to happen once. But who removes many modal dialogs\n // at a time?!\n var clone = this.pendingDialogStack.slice();\n clone.forEach(function(dpi) {\n if (removed.indexOf(dpi.dialog) !== -1) {\n dpi.downgradeModal();\n } else {\n dpi.maybeHideModal();\n }\n });\n };\n\n /**\n * @param {!dialogPolyfillInfo} dpi\n * @return {boolean} whether the dialog was allowed\n */\n dialogPolyfill.DialogManager.prototype.pushDialog = function(dpi) {\n var allowed = (this.zIndexHigh_ - this.zIndexLow_) / 2 - 1;\n if (this.pendingDialogStack.length >= allowed) {\n return false;\n }\n if (this.pendingDialogStack.unshift(dpi) === 1) {\n this.blockDocument();\n }\n this.updateStacking();\n return true;\n };\n\n /**\n * @param {!dialogPolyfillInfo} dpi\n */\n dialogPolyfill.DialogManager.prototype.removeDialog = function(dpi) {\n var index = this.pendingDialogStack.indexOf(dpi);\n if (index === -1) { return; }\n\n this.pendingDialogStack.splice(index, 1);\n if (this.pendingDialogStack.length === 0) {\n this.unblockDocument();\n }\n this.updateStacking();\n };\n\n dialogPolyfill.dm = new dialogPolyfill.DialogManager();\n dialogPolyfill.formSubmitter = null;\n dialogPolyfill.useValue = null;\n\n /**\n * Installs global handlers, such as click listers and native method overrides. These are needed\n * even if a no dialog is registered, as they deal with
.\n */\n if (window.HTMLDialogElement === undefined) {\n\n /**\n * If HTMLFormElement translates method=\"DIALOG\" into 'get', then replace the descriptor with\n * one that returns the correct value.\n */\n var testForm = document.createElement('form');\n testForm.setAttribute('method', 'dialog');\n if (testForm.method !== 'dialog') {\n var methodDescriptor = Object.getOwnPropertyDescriptor(HTMLFormElement.prototype, 'method');\n if (methodDescriptor) {\n // nb. Some older iOS and older PhantomJS fail to return the descriptor. Don't do anything\n // and don't bother to update the element.\n var realGet = methodDescriptor.get;\n methodDescriptor.get = function() {\n if (isFormMethodDialog(this)) {\n return 'dialog';\n }\n return realGet.call(this);\n };\n var realSet = methodDescriptor.set;\n methodDescriptor.set = function(v) {\n if (typeof v === 'string' && v.toLowerCase() === 'dialog') {\n return this.setAttribute('method', v);\n }\n return realSet.call(this, v);\n };\n Object.defineProperty(HTMLFormElement.prototype, 'method', methodDescriptor);\n }\n }\n\n /**\n * Global 'click' handler, to capture the or