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es.string.ends-with.js
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es.string.ends-with.js
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'use strict';
var $ = require('../internals/export');
var toLength = require('../internals/to-length');
var notARegExp = require('../internals/not-a-regexp');
var requireObjectCoercible = require('../internals/require-object-coercible');
var correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');
var nativeEndsWith = ''.endsWith;
var min = Math.min;
// `String.prototype.endsWith` method
// https://tc39.github.io/ecma262/#sec-string.prototype.endswith
$({ target: 'String', proto: true, forced: !correctIsRegExpLogic('endsWith') }, {
endsWith: function endsWith(searchString /* , endPosition = @length */) {
var that = String(requireObjectCoercible(this));
notARegExp(searchString);
var endPosition = arguments.length > 1 ? arguments[1] : undefined;
var len = toLength(that.length);
var end = endPosition === undefined ? len : min(toLength(endPosition), len);
var search = String(searchString);
return nativeEndsWith
? nativeEndsWith.call(that, search, end)
: that.slice(end - search.length, end) === search;
}
});