JavaScript/ Typescript object null check?

For null check, you can use ! condition.

Example

Following is the code −

var value=null;
if(!value) {
   console.log("This is null.");
} else {
   console.log("This is not null.");
}

To run the above program, you need to use the following command −

node fileName.js.

Here, my file name is demo305.js.

Output

This will produce the following output −

PS C:\Users\Amit\javascript-code> node demo305.js
This is null.

AmitDiwan

Published on 24-Oct-2020 12:20:14

• Related Questions & Answers
• Difference between TypeScript and JavaScript
• Set JavaScript object values to null?
• Filter away object in array with null values JavaScript
• The Null Object in Python
• How do I check for null values in JavaScript?
• What is the relationship between JavaScript, CoffeeScript, TypeScript, ES5, and ES6?
• Check for null in MongoDB?
• Is there any way to check if there is a null value in an object or array in JavaScript?
• How to check for null, undefined, or blank variables in JavaScript?
• Check if object contains all keys in JavaScript array
• Check for NULL or NOT NULL values in a column in MySQL
• Performing Null check using HANA SQL Script
• How to implement Null object Pattern in C#?
• How to check for 'undefined' or 'null' in a JavaScript array and display only non-null values?
• JavaScript ArrayBuffer Object