How to Print a Message to the Error Console Using JavaScript ?
This article will show you how to print a message using JavaScript on the error console. There are three methods to display the error console, these are:
Table of Content
- Using console.error() Method
- Using console.warn() Method
- Using console.info() Method
Approach 1: Using console.error() Method
The console.error() method is used to display an error message on the console. This method is used for testing purposes. The error message is sent as a parameter to the console.error() method.
Syntax:
console.error( message );
Example:
Javascript
const x = 20; if (x != 30) { console.error( '%d is not equal to 30' , x); } else { console.error( '%d is equal to 30' , x); } |
Output:
20 is not equal to 30
Approach 2: Using console.warn() Method
The console.warn() method is used to write a warning message in the console. To check the warning message, open the console panel to display the output (warning message).
Syntax:
console.warn( message )
Example:
Javascript
let str = [ "Welcome to w3wiki" ]; console.warn(str); |
Output:
Welcome to w3wiki
Approach 3: Using console.info() Method
The console.info() method is used to write a message in the console. It indicates an important message about any element or object. The message is sent as a parameter to the console.info() method.
Syntax:
console.info( message )
Example:
Javascript
let str = [ "Welcome to w3wiki" ]; console.info(str); |
[ 'Welcome to w3wiki' ]