33 lines
1.1 KiB
JavaScript
33 lines
1.1 KiB
JavaScript
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var baseToString = require('../internal/baseToString'),
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escapeRegExpChar = require('../internal/escapeRegExpChar');
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/**
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* Used to match `RegExp` [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns)
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* and those outlined by [`EscapeRegExpPattern`](http://ecma-international.org/ecma-262/6.0/#sec-escaperegexppattern).
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*/
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var reRegExpChars = /^[:!,]|[\\^$.*+?()[\]{}|\/]|(^[0-9a-fA-Fnrtuvx])|([\n\r\u2028\u2029])/g,
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reHasRegExpChars = RegExp(reRegExpChars.source);
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/**
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* Escapes the `RegExp` special characters "\", "/", "^", "$", ".", "|", "?",
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* "*", "+", "(", ")", "[", "]", "{" and "}" in `string`.
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*
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* @static
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* @memberOf _
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* @category String
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* @param {string} [string=''] The string to escape.
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* @returns {string} Returns the escaped string.
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* @example
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*
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* _.escapeRegExp('[lodash](https://lodash.com/)');
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* // => '\[lodash\]\(https:\/\/lodash\.com\/\)'
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*/
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function escapeRegExp(string) {
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string = baseToString(string);
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return (string && reHasRegExpChars.test(string))
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? string.replace(reRegExpChars, escapeRegExpChar)
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: (string || '(?:)');
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}
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module.exports = escapeRegExp;
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