console: warn() static method
The console.warn()
static method outputs a warning message to the 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 console log.
Syntax
js
warn(obj1)
warn(obj1, /* …, */ objN)
warn(msg)
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 to the console.
msg
-
A JavaScript string containing zero or more substitution strings, which are replaced with
subst1
throughsubstN
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 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
).
Specifications
Specification |
---|
Console Standard # warn |
Browser compatibility
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