Javascript test ( object && object !== “null” && object !== “undefined” )

Question

I seem to be using this test a lot

if( object && object !== \"null\" && object !== \"undefined\" ){
    doSomething();
}

on

Answer 1

The best way to check if an object is empty is by using a utility function like the one below.

create a function

function isEmpty(obj) {
    for(var key in obj) {
        if(obj.hasOwnProperty(key))
            return false;
    }
    return true;
}

Use above function following way:-

So if you have an empty object, you can check whether it is empty by using the above function.

var myObj = {}; // Empty Object
if(isEmpty(myObj)) {
    // Object is empty (Would return true in this example)
} else {
    // Object is NOT empty
}