32 lines
1.2 KiB
JavaScript
32 lines
1.2 KiB
JavaScript
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'use strict';
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var uncurryThis = require('../internals/function-uncurry-this');
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var requireObjectCoercible = require('../internals/require-object-coercible');
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var toString = require('../internals/to-string');
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var whitespaces = require('../internals/whitespaces');
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var replace = uncurryThis(''.replace);
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var ltrim = RegExp('^[' + whitespaces + ']+');
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var rtrim = RegExp('(^|[^' + whitespaces + '])[' + whitespaces + ']+$');
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// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
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var createMethod = function (TYPE) {
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return function ($this) {
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var string = toString(requireObjectCoercible($this));
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if (TYPE & 1) string = replace(string, ltrim, '');
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if (TYPE & 2) string = replace(string, rtrim, '$1');
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return string;
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};
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};
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module.exports = {
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// `String.prototype.{ trimLeft, trimStart }` methods
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// https://tc39.es/ecma262/#sec-string.prototype.trimstart
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start: createMethod(1),
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// `String.prototype.{ trimRight, trimEnd }` methods
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// https://tc39.es/ecma262/#sec-string.prototype.trimend
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end: createMethod(2),
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// `String.prototype.trim` method
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// https://tc39.es/ecma262/#sec-string.prototype.trim
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trim: createMethod(3)
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};
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