How to judge whether a value is Object Literal in JavaScript? [duplicate]

Question

In my limited experience about object type judgment,I don't know how to judge whether a value is Object Literal in JavaScript? I am searching for a long time on net.But no use.Please help or try to give some ideas how to achieve this.Thanks in advance!

The solution is: As we know,we can use 'typeof' or 'instanceof' to judge the type of value. For example,to judge an Array,we can use:

var array=[0,1,2,3,4];
if(Object.prototype.toString.call(array)==='[object Array]'){
    alert('This is an Array!');
}

But now I want to check whether a value is Object Literal like this:

var obj={
    a:2
};

How to judge it? My way is:

if(obj["__proto__"]["constructor"]===Object){
    alert("This is Object Literal");
}

I am afraid this way is wrong.

Answer 1

You can check by matching the constructor property with Object like the following:

var obj={
    a:2
};
console.log(obj.constructor == Object); // true

var arr = [1,2,3];
console.log(arr.constructor == Object); // false