Console warn()
Example
Write a warning to the console:
console.warn("This is a warning!");
Try it Yourself »
More examples below.
Description
The warn() method writes a warning to the console.
Note
When testing console methods, be sure to have the console view visible.
Press F12 to open the console veiw.
Syntax
console.warn(message)
Parameters
Parameter
Description
message
Required.
The message (warning) to write to the console.
The message (warning) to write to the console.
More Examples
Example
Use an object as the warning message:
const myObj = {firstname:"John", lastname:"Doe"};
console.warn(myObj);
Try it Yourself »
console.warn(myObj);
Example
Use an array as the warning message:
const myArr = ["Orange", "Banana", "Mango", "Kiwi"];
console.warn(myArr);
Try it Yourself »
console.warn(myArr);
Browser Support
console.warn() is supported in all browsers:
| Chrome | IE | Edge | Firefox | Safari | Opera |
| Yes | 8-11 | Yes | Yes | Yes | Yes |