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How to Check If a Value is an Object in JavaScript

mhmadesk
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2022-05-18
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How to Check If a Value is an Object in JavaScript

JavaScript programming,
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mhmadesk
2022-05-18
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Use the typeof Operator

You can use the typeof operator to check whether a value is an object or not in JavaScript. But, the typeof operator also returns "object" for null and arrays, so we need to consider that too.

Here's an example which offer a simple solution to this problem:

// Defining a function
function isObject(val) {
    if(typeof val === 'object' && val !== null && Array.isArray(val) === false){
        return true;
    } else {
        return false;
    }
}

// Testing few values    
console.log(isObject({}));  // Prints: true
console.log(isObject({name: "Alice", age: 24}));  // Prints: true
console.log(isObject(new Date()));  // Prints: true
console.log(isObject([1, 2, 3]));  // Prints: false
console.log(isObject(null));  // Prints: false
console.log(isObject("John"));  // Prints: false
console.log(isObject(function(){}));  // Prints: false
console.log(isObject(8));  // Prints: false

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