web-atoms-amd-loader
Version:
AMD Module loader for Web Atoms
50 lines • 1.56 kB
JavaScript
/*! https://mths.be/includes v1.0.0 by @mathias */
if (!String.prototype.includes) {
(function() {
'use strict'; // needed to support `apply`/`call` with `undefined`/`null`
var toString = {}.toString;
var defineProperty = (function() {
// IE 8 only supports `Object.defineProperty` on DOM elements
try {
var object = {};
var $defineProperty = Object.defineProperty;
var result = $defineProperty(object, object, object) && $defineProperty;
} catch(error) {}
return result;
}());
var indexOf = ''.indexOf;
var includes = function(search) {
if (this == null) {
throw TypeError();
}
var string = String(this);
if (search && toString.call(search) == '[object RegExp]') {
throw TypeError();
}
var stringLength = string.length;
var searchString = String(search);
var searchLength = searchString.length;
var position = arguments.length > 1 ? arguments[1] : undefined;
// `ToInteger`
var pos = position ? Number(position) : 0;
if (pos != pos) { // better `isNaN`
pos = 0;
}
var start = Math.min(Math.max(pos, 0), stringLength);
// Avoid the `indexOf` call if no match is possible
if (searchLength + start > stringLength) {
return false;
}
return indexOf.call(string, searchString, pos) != -1;
};
if (defineProperty) {
defineProperty(String.prototype, 'includes', {
'value': includes,
'configurable': true,
'writable': true
});
} else {
String.prototype.includes = includes;
}
}());
}