javascript is array empty
Whether an array is empty or not depends on its contents. An empty array is one that has no elements – it is represented in JavaScript as [ ]
. An array can be initialized with elements but still be considered empty if all the elements are empty themselves. For example, [ null, undefined, "" ]
is considered an empty array, even though it has three elements.
If you want to check if an array is empty or not, one simple way is to check its length:
let arr = [1, 2, 3];
if (arr.length > 0) {
console.log("Array is not empty");
} else {
console.log("Array is empty");
}
Here, we check the array's length attribute. If it is greater than 0, we know the array is not empty. Otherwise, it must be empty.