Determining if a value is an Object Literal in JavaScript: Tips for judging

As someone with limited experience in object type judgment, I find myself unsure of how to determine if a value is an Object Literal in JavaScript. Despite my efforts to search online for answers, I have not been successful. Any guidance or ideas on how to accomplish this task would be greatly appreciated. Thank you in advance!

A possible solution could involve using the 'typeof' or 'instanceof' operators to ascertain the type of a given value. For example, when determining if something is an Array:

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

However, I am now faced with the challenge of checking if a value is an Object Literal, such as:

var obj={
    a:2
};

How can I accurately make this determination?

My current approach involves:

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

I worry that this method may be incorrect.

Answer №1

To determine if an object is of type Object in JavaScript, you can simply compare its constructor property with the value Object as shown below:

var car={
    make:"Toyota"
};
console.log(car.constructor == Object); // true

var colors = ["red", "green", "blue"];
console.log(colors.constructor == Object); // false

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