How to check if an object is an array in JavaScript

In this tutorial, we are going to see how to check if an object is an array using the Array.isArray() method which returns a boolean determining whether the current value is an array or not. It will return true if it is an array, otherwise false.
 

How to check if an object is an array in JavaScript

var arr = ['a', 'b', 'c', 'd'];

Array.isArray(arr);  //true

Array.isArray({key: 'value'});  ///false

Array.isArray('string');  //false

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