console:timeLog() 静态方法
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Please help us by answering a few questions.
语法
js
timeLog()
timeLog(label)
timeLog(label, val1)
timeLog(label, val1, /* …, */ valN)
参数
label
-
计时器索引。
返回值
如果没有传入 label 参数,则以 default: 作为引导返回数据:
default: 1042ms
如果传入了一个已经存在的 label
,则会以 label:
作为引导返回数据:
label: 1242ms
异常
如果计时器未启动, timeLog()
会返回一个警告:
Timer "default" doesn't exist.
如果传入的 label 索引没有与之对应的计时器,则返回如下警告:
Timer "timer name" doesn't exist.
示例
js
console.time("answer time");
alert("Click to continue");
console.timeLog("answer time");
alert("Do a bunch of other stuff...");
console.timeEnd("answer time");
上例中的输出分别显示了用户从打开页面到关闭第一个 alert 和第二个 alert 框的时间间隔:
注意:使用 timelog()
输出计时器的值会显示计时器名称。使用 timeEnd()
停止也会显示计时器名称和输出计时器的值,并且,最后的 " - timer ended" 可以清楚的显示计时器不再计时的信息。
规范
Specification |
---|
Console # timelog |
浏览器兼容性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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timeLog() static method |
Legend
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- Full support
- Full support
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.