Merge pull request #14 from der-On/patch-1

added string.stripTags()

lib/string.js

@@ -784,6 +784,25 @@ string = new (function () {
 
     return uuid.join('');
   };
+
+  /**
+    @name string#stripTags
+    @public
+    @function
+    @return {String} A String with HTML tags removed.
+    @description Strips HTML tags from a string.
+    @param {String} The string to strip HTML tags from
+    @param {String|Array} A String or Array containing allowed tags. e.g. "<br><p>"
+  */
+  this.stripTags = function(string, allowed) {
+    // taken from http://phpjs.org/functions/strip_tags/
+    var allowed = (((allowed || "") + "").toLowerCase().match(/<[a-z][a-z0-9]*>/g) || []).join(''); // making sure the allowed arg is a string containing only tags in lowercase (<a><b><c>)
+    var tags = /<\/?([a-z][a-z0-9]*)\b[^>]*>/gi,
+    comments = /<!--[\s\S]*?-->/gi;
+    return string.replace(comments, '').replace(tags, function ($0, $1) {
+      return allowed.indexOf('<' + $1.toLowerCase() + '>') > -1 ? $0 : '';
+    });
+  }
 
 })();
 

test/string.js

@@ -404,6 +404,16 @@ tests = {
     assert.equal(expected, data);
   }
 
+, 'test stripTags': function () {
+    var html = '<div>foo</div><p>bar<br/>wooby</p>'
+      , expected = 'foobarwooby';
+    assert.equal(string.stripTags(html), expected);
+  }
+, 'test stripTags with allowed <br>': function () {
+    var html = '<div>foo</div><p>bar<br/>wooby</p>'
+      , expected = 'foobar<br/>wooby';
+    assert.equal(string.stripTags(html, '<br>'), expected);
+  }
 };
 
 module.exports = tests;