sextend

Adds static variables to JS inheritance.

sextend

sextend ("super extend") allows you to to do inheritance in JavaScript and in much the same manner as util.inherits in Node.js, except now you also inherit class variables too! Isn't that cool?

For further awesome, you can also add mixins at the same time!

For extending, just use it like you would use util.inherits in node.js.

In node:

var sextend = require('sextend');
 
function A(){}
A.coolStaticVar = "fun";
function B(){}
sextend(B, A);
 
console.log(A.coolStaticVar); // fun 

In browser:

<script src="sextend.js"></script>
<script>
function A(){}
A.coolStaticVar = "fun";
function B(){}
sextend(B, A);
 
console.log(A.coolStaticVar); // fun
</script> 

For mixins, you can add extra arguments that are mixin functions. A mixin function is just a function that refers to the destination object as this and adds properties accordingly.

Example:

function A(){}
function MyMixin(){
  this.prototype.instanceVar = 1;
  this.staticVar = 2;
}
sextend(A, null, MyMixin); // superclass is optional 
 
console.log(A.staticVar); // 2 
console.log((new A()).instanceVar); // 1 

WTFPL