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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
// This file can be removed, when we stop supporting IE11.
// Polyfill for .before()
// from: https://github.com/jserz/js_piece/blob/master/DOM/ChildNode/before()/before().md
// Copyright (c) 2016-present, jszhou
// MIT License
(function (arr) {
arr.forEach(function (item) {
if (item.hasOwnProperty('before')) {
return;
}
Object.defineProperty(item, 'before', {
configurable: true,
enumerable: true,
writable: true,
value: function before() {
var argArr = Array.prototype.slice.call(arguments),
docFrag = document.createDocumentFragment();
argArr.forEach(function (argItem) {
var isNode = argItem instanceof Node;
docFrag.appendChild(isNode ? argItem : document.createTextNode(String(argItem)));
});
this.parentNode.insertBefore(docFrag, this);
}
});
});
})([Element.prototype, CharacterData.prototype, DocumentType.prototype]);
// Polyfill for .startsWith()
// from: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith#Polyfill
if (!String.prototype.startsWith) {
Object.defineProperty(String.prototype, 'startsWith', {
value: function(search, pos) {
pos = !pos || pos < 0 ? 0 : +pos;
return this.substring(pos, pos + search.length) === search;
}
});
}
// Polyfill for .matches()
// from: https://developer.mozilla.org/en-US/docs/Web/API/Element/matches#Polyfill
if (!Element.prototype.matches) {
Element.prototype.matches = Element.prototype.msMatchesSelector ||
Element.prototype.webkitMatchesSelector;
}
// Polyfill for iterable Set (IE11)
// from: https://stackoverflow.com/a/45686452/3057764
if (new Set([0]).size === 0) {
//constructor doesn't take an iterable as an argument - thanks IE
const BuiltinSet = Set;
Set = function Set(iterable) {
const set = new BuiltinSet();
if (iterable) {
iterable.forEach(set.add, set);
}
return set;
};
Set.prototype = BuiltinSet.prototype;
Set.prototype.constructor = Set;
}
// Polyfill for using :scope in querySelector/querySelectorAll
// from: https://github.com/lazd/scopedQuerySelectorShim
// Copyright (C) 2015 Larry Davis
// This software may be modified and distributed under the terms of the BSD license.
(function() {
if (!HTMLElement.prototype.querySelectorAll) {
throw new Error("rootedQuerySelectorAll: This polyfill can only be used with browsers that support querySelectorAll");
}
// A temporary element to query against for elements not currently in the DOM
// We'll also use this element to test for :scope support
var container = document.createElement("div");
// Check if the browser supports :scope
try {
// Browser supports :scope, do nothing
container.querySelectorAll(":scope *");
} catch (e) {
// Match usage of scope
var scopeRE = /^\s*:scope/gi;
// Overrides
function overrideNodeMethod(prototype, methodName) {
// Store the old method for use later
var oldMethod = prototype[methodName];
// Override the method
prototype[methodName] = function(query) {
var nodeList, gaveId = false, gaveContainer = false;
if (query.match(scopeRE)) {
// Remove :scope
query = query.replace(scopeRE, "");
if (!this.parentNode) {
// Add to temporary container
container.appendChild(this);
gaveContainer = true;
}
parentNode = this.parentNode;
if (!this.id) {
// Give temporary ID
this.id = "rootedQuerySelector_id_" + new Date().getTime();
gaveId = true;
}
// Find elements against parent node
nodeList = oldMethod.call(parentNode, "#" + this.id + " " + query);
// Reset the ID
if (gaveId) {
this.id = "";
}
// Remove from temporary container
if (gaveContainer) {
container.removeChild(this);
}
return nodeList;
} else {
// No immediate child selector used
return oldMethod.call(this, query);
}
};
}
// Browser doesn't support :scope, add polyfill
overrideNodeMethod(HTMLElement.prototype, "querySelector");
overrideNodeMethod(HTMLElement.prototype, "querySelectorAll");
}
})();
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */