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44 lines
1.4 KiB
JavaScript
44 lines
1.4 KiB
JavaScript
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var escapeHtmlChar = require('./_escapeHtmlChar'),
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toString = require('./toString');
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/** Used to match HTML entities and HTML characters. */
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var reUnescapedHtml = /[&<>"']/g,
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reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
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/**
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* Converts the characters "&", "<", ">", '"', and "'" in `string` to their
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* corresponding HTML entities.
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*
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* **Note:** No other characters are escaped. To escape additional
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* characters use a third-party library like [_he_](https://mths.be/he).
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*
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* Though the ">" character is escaped for symmetry, characters like
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* ">" and "/" don't need escaping in HTML and have no special meaning
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* unless they're part of a tag or unquoted attribute value. See
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* [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
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* (under "semi-related fun fact") for more details.
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*
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* When working with HTML you should always
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* [quote attribute values](http://wonko.com/post/html-escaping) to reduce
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* XSS vectors.
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*
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* @static
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* @since 0.1.0
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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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* _.escape('fred, barney, & pebbles');
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* // => 'fred, barney, & pebbles'
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*/
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function escape(string) {
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string = toString(string);
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return (string && reHasUnescapedHtml.test(string))
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? string.replace(reUnescapedHtml, escapeHtmlChar)
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: string;
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}
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module.exports = escape;
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