The console.count()
method logs the number of times that this particular call to count()
has been called.
Note: This feature is available in Web Workers.
Syntax
console.count([label]);
Parameters
label
Optional- A
String
. If supplied,count()
outputs the number of times it has been called with that label. If omitted,count()
behaves as though it was called with the "default" label.
Examples
For example, given code like this:
let user = ""; function greet() { console.count(); return "hi " + user; } user = "bob"; greet(); user = "alice"; greet(); greet(); console.count();
Console output will look something like this:
"default: 1" "default: 2" "default: 3" "default: 4"
The label is displayed as default
because no explicit label was supplied.
If we pass the user
variable as the label
argument to the first invocation of count()
, and the string "alice" to the second:
let user = ""; function greet() { console.count(user); return "hi " + user; } user = "bob"; greet(); user = "alice"; greet(); greet(); console.count("alice");
We will see output like this:
"bob: 1" "alice: 1" "alice: 2" "alice: 3"
We're now maintaining separate counts based only on the value of label
.
Specifications
Specification | Status | Comment |
---|---|---|
Console API The definition of 'console.count()' in that specification. |
Living Standard | Initial definition |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
count | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 30 | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 30 | Opera Android ? | Safari iOS ? | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown