| var baseToString = require('../internal/baseToString'), |
| escapeHtmlChar = require('../internal/escapeHtmlChar'); |
| |
| /** Used to match HTML entities and HTML characters. */ |
| var reUnescapedHtml = /[&<>"'`]/g, |
| reHasUnescapedHtml = RegExp(reUnescapedHtml.source); |
| |
| /** |
| * Converts the characters "&", "<", ">", '"', "'", and "\`", in `string` to |
| * their corresponding HTML entities. |
| * |
| * **Note:** No other characters are escaped. To escape additional characters |
| * use a third-party library like [_he_](https://mths.be/he). |
| * |
| * Though the ">" character is escaped for symmetry, characters like |
| * ">" and "/" don't need escaping in HTML and have no special meaning |
| * unless they're part of a tag or unquoted attribute value. |
| * See [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands) |
| * (under "semi-related fun fact") for more details. |
| * |
| * Backticks are escaped because in Internet Explorer < 9, they can break out |
| * of attribute values or HTML comments. See [#59](https://html5sec.org/#59), |
| * [#102](https://html5sec.org/#102), [#108](https://html5sec.org/#108), and |
| * [#133](https://html5sec.org/#133) of the [HTML5 Security Cheatsheet](https://html5sec.org/) |
| * for more details. |
| * |
| * When working with HTML you should always [quote attribute values](http://wonko.com/post/html-escaping) |
| * to reduce XSS vectors. |
| * |
| * @static |
| * @memberOf _ |
| * @category String |
| * @param {string} [string=''] The string to escape. |
| * @returns {string} Returns the escaped string. |
| * @example |
| * |
| * _.escape('fred, barney, & pebbles'); |
| * // => 'fred, barney, & pebbles' |
| */ |
| function escape(string) { |
| // Reset `lastIndex` because in IE < 9 `String#replace` does not. |
| string = baseToString(string); |
| return (string && reHasUnescapedHtml.test(string)) |
| ? string.replace(reUnescapedHtml, escapeHtmlChar) |
| : string; |
| } |
| |
| module.exports = escape; |
