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mirror of https://github.com/gorhill/uBlock.git synced 2024-11-07 03:12:33 +01:00
uBlock/platform/chromium/polyfill.js
2017-05-16 08:12:44 -04:00

75 lines
2.7 KiB
JavaScript

/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2014-2017 The uBlock Origin authors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
// For background page or non-background pages
/* exported objectAssign */
'use strict';
/******************************************************************************/
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/1067
// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
// Firefox 17/Chromium 41 supports `startsWith`.
if ( String.prototype.startsWith instanceof Function === false ) {
String.prototype.startsWith = function(needle, pos) {
if ( typeof pos !== 'number' ) {
pos = 0;
}
return this.lastIndexOf(needle, pos) === pos;
};
}
/******************************************************************************/
// https://github.com/gorhill/uBlock/issues/1067
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
// Firefox 17/Chromium 41 supports `endsWith`.
if ( String.prototype.endsWith instanceof Function === false ) {
String.prototype.endsWith = function(needle, pos) {
if ( typeof pos !== 'number' ) {
pos = this.length;
}
pos -= needle.length;
return this.indexOf(needle, pos) === pos;
};
}
/******************************************************************************/
// As per MDN, Object.assign appeared first in Chromium 45.
// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign#Browser_compatibility
var objectAssign = Object.assign || function(target, source) {
var keys = Object.keys(source);
for ( var i = 0, n = keys.length, key; i < n; i++ ) {
key = keys[i];
target[key] = source[key];
}
return target;
};
/******************************************************************************/