Console.warn() - Web APIs 编辑

Outputs a warning message to the Web Console.

Note:

This feature is available in Web Workers.

Note:

In Chrome and Firefox, warnings have a small exclamation point icon next to them in the Web Console log.

Syntax

console.warn(obj1 [, obj2, ..., objN]);
console.warn(msg [, subst1, ..., substN]);

Parameters

obj1 ... objN

A list of JavaScript objects to output. The string representations of each of these objects are appended together in the order listed and output.

msg

A JavaScript string containing zero or more substitution strings.

subst1 ... substN

JavaScript objects with which to replace substitution strings within msg. This gives you additional control over the format of the output.

See Outputting text to the console in the documentation of console for details.

Specifications

Specification	Status	Comment
Console API The definition of 'console.warn()' in that specification.	Living Standard	Initial definition

Browser compatibility

BCD tables only load in the browser

See also

• Opera Dragonfly documentation: Console
• MSDN: Using the F12 Tools Console to View Errors and Status