diff --git a/collections/DOM/class-manipulation-prototype.md b/collections/DOM/class-manipulation-prototype.md
new file mode 100644
index 00000000..8d71c6aa
--- /dev/null
+++ b/collections/DOM/class-manipulation-prototype.md
@@ -0,0 +1,13 @@
+~~~ javascript
+// el.addClass('the-class');
+Element.prototype.addClass = function(newClass) { this.classList.add(newClass); return this; }
+
+// el.removeClass('the-class');
+Element.prototype.removeClass = function(oldClass) { this.classList.remove(oldClass); return this; }
+
+// el.toggleClass('the-class');
+Element.prototype.toggleClass = function(thisClass) { this.classList.toggle(thisClass); return this; }
+
+// if(el.hasClass('the-class'))
+Element.prototype.hasClass = function(thisClass) { return this.classList.contains(thisClass); }
+~~~
diff --git a/collections/DOM/get-set-element-value-prototype.md b/collections/DOM/get-set-element-value-prototype.md
new file mode 100644
index 00000000..011d0078
--- /dev/null
+++ b/collections/DOM/get-set-element-value-prototype.md
@@ -0,0 +1,5 @@
+~~~ javascript
+// set value --> el.val('Hello World');
+// get value --> el.val();
+Element.prototype.val = function(newValue) { if(newValue === undefined) return this.value; this.value = newValue; return this; }
+~~~
diff --git a/collections/DOM/hide-show-an-element-prototype.md b/collections/DOM/hide-show-an-element-prototype.md
new file mode 100644
index 00000000..9a237358
--- /dev/null
+++ b/collections/DOM/hide-show-an-element-prototype.md
@@ -0,0 +1,10 @@
+~~~ javascript
+// el.hide();
+Element.prototype.hide = function() { this.style.display = 'none'; return this; }
+
+// el.hide();
+Element.prototype.show = function() { this.style.display = ''; return this; }
+
+// el.toggle();
+Element.prototype.toggle = function() { this.style.display = (this.style.display !== 'none') ? 'none' : ''; return this; }
+~~~