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The Console method debug() outputs a message to the web console at the "debug" log level. The message is only displayed to the user if the console is configured to display debug output.

Note: This feature is available in Web Workers.

Syntax

console.debug(obj1 [, obj2, ..., objN]);
console.debug(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 to the console.
msg
A JavaScript string containing zero or more substitution strings, which are replaced with subst1 through substN in consecutive order.
subst1 ... substN
JavaScript objects with which to replace substitution strings within msg. This gives you additional control over the format of the output. See Using string substitutions in Console for a description of how substitutions work.

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

Specifications

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
debugChrome Full support YesEdge ? Firefox Full support 4IE ? Opera ? Safari Full support YesWebView Android ? Chrome Android ? Edge Mobile ? Firefox Android Full support 4Opera Android ? Safari iOS ? Samsung Internet Android ?
Substitution stringsChrome Full support Yes
Notes
Full support Yes
Notes
Notes In version 28, if a negative value is passed to %d, it will be rounded down to the closest negative integer. For example, -0.1 becomes -1.
Edge Full support YesFirefox Full support 9IE Full support 10
Notes
Full support 10
Notes
Notes %c is not supported.
Notes %d outputs a 0 if the specified value isn't a number.
Opera ? Safari ? WebView Android ? Chrome Android ? Edge Mobile Full support YesFirefox Android Full support 9Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.

See also

Метки документа и участники

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