The console.debug() method 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. In most cases, the log level is configured within the console UI. This log level might correspond to the `Debug` or `Verbose` log level.

Note: This feature is available in Web Workers


debug(obj1, /* ..., */ objN)
debug(msg, subst1, /* ..., */ substN])


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.


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.

Return value

None (undefined).


Console Standard
# debug

Browser compatibility

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