Add escape/unescape string

snippets/escapeString.md

@@ -0,0 +1,14 @@
+### escapeString
+
+Escapes a string for use in HTML.
+
+Use a chain of `String.replace()` calls combined with regular expressions to replace special characters with the proper symbols.
+
+```js
+const escapeString = str =>
+  str.replace(/&/g, '&amp;').replace(/"/g, '&quot;').replace(/'/g, '&#39;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
+```
+
+```js
+escapeString('<a href="#">Me & you</a>'); // '&lt;a href=&quot;#&quot;&gt;Me &amp; you&lt;/a&gt;'
+```