在此页

• 概念和用法
• 接口
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

控制台 API 提供允许开发者履行调试任务的功能，譬如：在代码中设定点日志消息或变量值，或计时完成操作需要多长时间。

概念和用法

The Console API started as a largely proprietary API, with different browsers implementing it, albeit it in inconsistent ways. The Console API spec was created to define consistent behavior, and all modern browsers eventually settled on implementing this behavior — although some implementations still have their own additional proprietary functions. Find out about these at:

• Google Chrome DevTools implementation
• Safari DevTools implementation

Usage is very simple — the console object — available via window.console ，或 WorkerGlobalScope.console in workers; accessible using just console — contains many methods that you can call to perform rudimentary debugging tasks, generally focused around logging various values to the browser's Web 控制台 .

By far the most commonly-used method is console.log , which is used to log the current value contained inside a specific variable.

接口

console

Provides rudimentary debugging functionality, including logging, stack traces, timers, and counters.

范例

let myString = 'Hello world';
// Output "Hello world" to the console
console.log(myString)
					

见 控制台参考页 了解更多范例。

规范

规范	状态	注释
控制台 API	实时标准	初始定义。

浏览器兼容性

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. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
控制台	Chrome 1	Edge 12	Firefox 2	IE 8 8 In Internet Explorer 8 and 9, the console object is undefined when the developer tools are not open. This behavior was fixed in Internet Explorer 10.	Opera 10.5	Safari 3	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 11	Safari iOS 1	Samsung Internet Android 1.0
assert	Chrome 1	Edge 12	Firefox 28	IE 8	Opera 11	Safari 4	WebView Android 1	Chrome Android 18	Firefox Android 28	Opera Android 11	Safari iOS 3.2	Samsung Internet Android 1.0
clear	Chrome Yes	Edge 12	Firefox 48	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 48	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
count	Chrome Yes	Edge 12	Firefox 30	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 30	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
countReset	Chrome Yes	Edge ≤79	Firefox 62	IE No	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android 62	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
debug	Chrome Yes	Edge 12	Firefox 4	IE Yes	Opera ?	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
dir	Chrome 1	Edge 12	Firefox 8	IE 9	Opera 11	Safari 4	WebView Android 1	Chrome Android 18	Firefox Android 8	Opera Android 11	Safari iOS 3.2	Samsung Internet Android 1.0
dirxml	Chrome Yes	Edge 12	Firefox Yes	IE Yes	Opera Yes	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android No	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
error	Chrome 1	Edge 12	Firefox 4	IE 8	Opera 10.5	Safari 3	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 11	Safari iOS 1	Samsung Internet Android 1.0
exception (an alias for error ) 弃用 非标	Chrome No	Edge 13 — 79	Firefox 28	IE No	Opera No	Safari No	WebView Android No	Chrome Android No	Firefox Android 28	Opera Android ?	Safari iOS No	Samsung Internet Android No
group	Chrome 1	Edge 12	Firefox 4	IE 11	Opera Yes	Safari 4	WebView Android 37	Chrome Android 18	Firefox Android 4	Opera Android ?	Safari iOS ?	Samsung Internet Android 1.0
groupCollapsed	Chrome 6	Edge 12	Firefox 52	IE 11	Opera ?	Safari 5.1	WebView Android 37	Chrome Android 18	Firefox Android 52	Opera Android ?	Safari iOS ?	Samsung Internet Android 1.0
groupEnd	Chrome 1	Edge 12	Firefox 9	IE 11	Opera Yes	Safari 4	WebView Android 37	Chrome Android 18	Firefox Android 9	Opera Android ?	Safari iOS ?	Samsung Internet Android 1.0
info	Chrome Yes	Edge 12	Firefox 4	IE 8	Opera Yes	Safari Yes Yes No information icon	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
log	Chrome 1	Edge 12	Firefox 4	IE 8	Opera 10.5	Safari 3	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 11	Safari iOS 1	Samsung Internet Android 1.0
profile 非标	Chrome 53	Edge 12	Firefox Yes	IE Yes	Opera ?	Safari ?	WebView Android 53	Chrome Android 53	Firefox Android 10	Opera Android ?	Safari iOS ?	Samsung Internet Android 6.0
profileEnd 非标	Chrome Yes	Edge 12	Firefox Yes	IE Yes	Opera ?	Safari ?	WebView Android Yes	Chrome Android Yes	Firefox Android 10	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
table	Chrome 27	Edge 13	Firefox 34	IE No	Opera 11	Safari 6.1	WebView Android ≤37	Chrome Android 27	Firefox Android 34	Opera Android 11	Safari iOS 7	Samsung Internet Android 1.5
time	Chrome 1	Edge 12	Firefox 10	IE 11	Opera 11	Safari 4	WebView Android 1	Chrome Android 18	Firefox Android 10	Opera Android 11	Safari iOS 3.2	Samsung Internet Android 1.0
timeEnd	Chrome 1	Edge 12	Firefox 10	IE 11	Opera Yes	Safari 4	WebView Android 1	Chrome Android 18	Firefox Android 10	Opera Android ?	Safari iOS ?	Samsung Internet Android 1.0
timeLog	Chrome 72	Edge 79	Firefox 62	IE No	Opera 60	Safari No 不支持 No 见 bug 186833 .	WebView Android 72	Chrome Android 72	Firefox Android 62	Opera Android ?	Safari iOS No	Samsung Internet Android 11.0
timestamp 非标	Chrome Yes	Edge 12	Firefox Yes	IE 11	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 10	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
trace	Chrome 1	Edge 12	Firefox 10	IE 11	Opera 11	Safari 4	WebView Android 1	Chrome Android 18	Firefox Android 10	Opera Android 11	Safari iOS 3.2	Samsung Internet Android 1.0
warn	Chrome Yes	Edge 12	Firefox 4	IE 8	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes
Available in workers	Chrome Yes	Edge 12	Firefox 38	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 38	Opera Android ?	Safari iOS ?	Samsung Internet Android Yes

图例

完整支持

完整支持

不支持

不支持

兼容性未知 ?

兼容性未知

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

非标。预期跨浏览器支持较差。

非标。预期跨浏览器支持较差。

弃用。不要用于新网站。

弃用。不要用于新网站。

见实现注意事项。

另请参阅

• 工具
• Web 控制台 — Firefox 中的 Web 控制台如何处理控制台 API 调用
• 远程调试 — 如何查看控制台输出当调试目标是移动设备时

元数据

• 最后修改： Jul 29, 2019

相关话题

1. 控制台 API
2. 接口

   1. 控制台
3. 特性

   1. Window.console
   2. WorkerGlobalScope.console