Console warn()

Write a warning to the console:

console.warn("This is a warning!");

More examples below.

Description

The warn() method writes a warning to the console.

When testing console methods, be sure to have the console view visible.

Press F12 to open the console veiw.

console.warn( message)

Parameter	Description
message	Required. The message (warning) to write to the console.

Use an object as the warning message:

const myObj = {firstname:"John", lastname:"Doe"};
console.warn(myObj);

Use an array as the warning message:

const myArr = ["Orange", "Banana", "Mango", "Kiwi"];
console.warn(myArr);

console.warn() is supported in all browsers:


Chrome	IE	Edge	Firefox	Safari	Opera
Yes	8-11	Yes	Yes	Yes	Yes