1 files changed, 59 insertions, 0 deletions
diff --git a/bootstrap/comments/frontend/classes.js b/bootstrap/comments/frontend/classes.js
new file mode 100644
index 0000000..831c924
--- /dev/null
+++ b/bootstrap/comments/frontend/classes.js
@@ -0,0 +1,59 @@
+// Collection of element class related functions (classes.js)
+HashOverConstructor.prototype.classes = new (function () {
+	// Check whether browser has classList support
+	if (document.documentElement.classList) {
+		// If so, wrap relevant functions
+		// classList.contains () method
+		this.contains = function (element, className)
+		{
+			return element.classList.contains (className);
+		};
+
+		// classList.add () method
+		this.add = function (element, className)
+		{
+			element.classList.add (className);
+		};
+
+		// classList.remove () method
+		this.remove = function (element, className)
+		{
+			element.classList.remove (className);
+		};
+	} else {
+		// If not, define fallback functions
+		// classList.contains () method
+		this.contains = function (element, className)
+		{
+			if (!element || !element.className) {
+				return false;
+			}
+
+			var regex = new RegExp ('(^|\\s)' + className + '(\\s|$)');
+			return regex.test (element.className);
+		};
+
+		// classList.add () method
+		this.add = function (element, className)
+		{
+			if (!element) {
+				return false;
+			}
+
+			if (!this.contains (element, className)) {
+				element.className += (element.className ? ' ' : '') + className;
+			}
+		};
+
+		// classList.remove () method
+		this.remove = function (element, className)
+		{
+			if (!element || !element.className) {
+				return false;
+			}
+
+			var regex = new RegExp ('(^|\\s)' + className + '(\\s|$)', 'g');
+			element.className = element.className.replace (regex, '$2');
+		};
+	}
+}) ();