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WebSocket.close() 方法关闭 WebSocket 连接或连接尝试（如果有的话）。 如果连接已经关闭,则此方法不执行任何操作。
语法
WebSocket.close();
参数
code可选- 一个数字状态码，它解释了连接关闭的原因。如果没有传这个参数，默认使用1005。
CloseEvent的允许的状态码见状态码列表 。 reason可选- 一个人类可读的字符串，它解释了连接关闭的原因。这个UTF-8编码的字符串不能超过123个字节。
抛出的异常
INVALID_ACCESS_ERR- 一个无效的
code SYNTAX_ERRreason字符串太长（超过123字节）
注意: 在Gecko 8.0 (Firefox 8.0 / Thunderbird 8.0 / SeaMonkey 2.5)之前版本的Gecko里，这个方法不支持传参数。
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'WebSocket.close()' 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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
close | Chrome Full support 4 | Edge Full support 12 | Firefox
Full support
8
| IE Full support 10 | Opera Full support 12.1 | Safari Full support 5 | WebView Android Full support ≤37 | Chrome Android Full support 18 | Firefox Android
Full support
8
| Opera Android Full support 12.1 | Safari iOS Full support 4.2 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support
- See implementation notes.
- See implementation notes.