Bump to v3.0.0.

string/escape.js

@@ -0,0 +1,48 @@
+import baseToString from '../internal/baseToString';
+import escapeHtmlChar from '../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 require 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 [#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 to reduce
+ * XSS vectors. See [Ryan Grove's article](http://wonko.com/post/html-escaping)
+ * for more details.
+ *
+ * @static
+ * @memberOf _
+ * @category String
+ * @param {string} [string=''] The string to escape.
+ * @returns {string} Returns the escaped string.
+ * @example
+ *
+ * _.escape('fred, barney, & pebbles');
+ * // => 'fred, barney, &amp; 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;
+}
+
+export default escape;