bind in js

bind.js

var a=2;
var obj={a: 3};
function getA() { return this.a; }

console.log(getA()); // 2
var tmp=getA.bind(obj);
console.log(tmp()); // 3



// https://stackoverflow.com/questions/5490448/how-do-i-pass-the-this-context-into-an-event-handler