HTML DOM console.warn() Method

console.warn()Method writes a warning message to the console.

Typically, warnings are in a yellow background in the Web console log and are accompanied by a small exclamation mark icon.

This console can be used for testing or debugging purposes.

Syntax:

console.warn(message)

Example

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

All browsers fully support the console.warn() method:

Method
console.warn()	Yes	Yes	Yes	Yes	Yes

Parameter	Description
Message	String or object to be written to the console

This example writes an object to the console:

Example

var myObj = { str: "Some text", id:　12　};
console.warn(myObj);

This example writes an array to the console:

Example

var arr = ["Item1", "Item2", "Item3", "Item4"];
console.warn(arr);