| 1 | var toString = require('./toString');
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| 2 |
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| 3 | /**
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| 4 | * Used to match `RegExp`
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| 5 | * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
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| 6 | */
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| 7 | var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
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| 8 | reHasRegExpChar = RegExp(reRegExpChar.source);
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| 9 |
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| 10 | /**
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| 11 | * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
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| 12 | * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
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| 13 | *
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| 14 | * @static
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| 15 | * @memberOf _
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| 16 | * @since 3.0.0
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| 17 | * @category String
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| 18 | * @param {string} [string=''] The string to escape.
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| 19 | * @returns {string} Returns the escaped string.
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| 20 | * @example
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| 21 | *
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| 22 | * _.escapeRegExp('[lodash](https://lodash.com/)');
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| 23 | * // => '\[lodash\]\(https://lodash\.com/\)'
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| 24 | */
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| 25 | function escapeRegExp(string) {
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| 26 | string = toString(string);
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| 27 | return (string && reHasRegExpChar.test(string))
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| 28 | ? string.replace(reRegExpChar, '\\$&')
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| 29 | : string;
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| 30 | }
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| 31 |
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| 32 | module.exports = escapeRegExp;
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