The console.warn()
method 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.
The console.warn()
method 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.
js
warn(obj1) warn(obj1, /* …, */ objN) warn(msg) warn(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.
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.
None (undefined
).
Specification |
---|
Console Standard # warn |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
warn |
1 | 12 | 4 | 8 | 10.5 | 3 | 4.4 | 18 | 4 | 11 | 1 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/console/warn