How to check if array is empty or null or undefined in javascript?

How to check if array is empty or null or undefined in javascript?

In this post we will give you information about How to check if array is empty or null or undefined in javascript?. Hear we will give you detail about How to check if array is empty or null or undefined in javascript?And how to use it also give you demo for it if it is necessary.

If need for jquery check if array is empty or undefined then i will help you. you can easily check if array is empty or not in javascript. we will use simple if condition and length of array with checking. so we can easily check if array is empty null undefined in javascript.

See also  Multi select autocomplete jquery example with code

Here i will give you simple example with multiple cases so you can use any one from there. i will suggest you that you can use this one as bellow simple code:

if (myArray && myArray.length > 0) {

console.log('myArray is not empty.');

}else{

console.log('myArray is empty.');

}

You can also see bellow full example for checking jquery array if empty. So let’s bellow code and also check output as i attached bellow:

Example:

<!DOCTYPE html>

<html>

<head>

<title>How to check if array is empty or null or undefined in javascript? - ItSolutionStuff.com</title>

</head>

<body>

<script type="text/javascript">

/*

Basic Checking for Jquery Array

*/

var myArray = [1, 2, 3];

if (myArray && myArray.length > 0) {

console.log('myArray is not empty.');

}else{

console.log('myArray is empty.');

}

/*

Basic Checking with empty array for Jquery Array

*/

var myArray2 = [];

if (myArray2 && myArray2.length > 0) {

console.log('myArray2 is not empty.');

}else{

console.log('myArray2 is empty.');

}

/*

Basic Checking with undefined array for Jquery Array

*/

if (typeof myArray3 !== 'undefined' && myArray3.length > 0) {

console.log('myArray3 is not empty.');

}else{

console.log('myArray3 is empty.');

}

/*

Basic Checking with null array for Jquery Array

*/

var myArray4 = null;

if (myArray4 && myArray4.length > 0) {

console.log('myArray4 is not empty.');

}else{

console.log('myArray4 is empty.');

}

</script>

</body>

</html>

Output:

Also see:How to check if key exists in json object in jquery?

myArray is not empty.

myArray2 is empty.

myArray3 is empty.

myArray4 is empty.

I hope it can help you…

Hope this code and post will helped you for implement How to check if array is empty or null or undefined in javascript?. if you need any help or any feedback give it in comment section or you have good idea about this post you can give it comment section. Your comment will help us for help you more and improve us. we will give you this type of more interesting post in featured also so, For more interesting post and code Keep reading our blogs

For More Info See :: laravel And github

Leave a Comment

Your email address will not be published. Required fields are marked *

  +  77  =  85

We're accepting well-written guest posts and this is a great opportunity to collaborate : Contact US