In this article, you will learn about the javascript Array built-in method Array.prototype.isArray(). How does this method work in javascript?
The Array.prototype.isArray() method checks whether the passed value is an array or not. It returns true if the value is an Array; otherwise, it returns false. It returns always false if the value is a TypedArray instance.
array.isArray(value);This method takes 1 parameter as given below:
Here are some examples of Array.prototype.isArray() method:
//Here some examples of Array.isArray() Method
console.log(Array.isArray([]));
// Output => true
console.log(Array.isArray([1]));
// Output => true
console.log(Array.isArray(new Array()));
// Output => true
console.log(Array.isArray(new Array("a", "b", "c", "d")));
// Output => true
console.log(Array.isArray(new Array(3)));
// Output => true
// Little known fact: Array.prototype itself is an array:
console.log(Array.isArray(Array.prototype));
// Output => true
console.log(Array.isArray());
// Output => false
console.log(Array.isArray({}));
// Output => false
console.log(Array.isArray(null));
// Output => false
console.log(Array.isArray(undefined));
// Output => false
console.log(Array.isArray(17));
// Output => false
console.log(Array.isArray("Array"));
// Output => false
console.log(Array.isArray(true));
// Output => false
console.log(Array.isArray(false));
// Output => false
console.log(Array.isArray(new Uint8Array(32)));
// Output => false
// This is not an array, because it was not created using the
// array literal syntax or the Array constructor
console.log(Array.isArray({ __proto__: Array.prototype }));
// Output => false
I hope this article will help you to understand the javascript Array built-in method Array.prototype.isArray().
Share your valuable feedback, please post your comment at the bottom of this article. Thank you!
Comments