非标准
该特性是非标准的，请尽量不要在生产环境中使用它！
此事件是早期版本的规范中的一个提案。不要依赖它。
beforescriptexecute 事件在一个脚本被执行前触发，取消此事件可以阻止该脚本的执行。
这是一个 Gecko（Firefox）特有的私有事件。
| 是否冒泡 | 是 |
|---|---|
| 是否可取消 | 是 |
| 接口 | Event |
| 事件处理器属性 | 无 |
规范
不属于任何规范。
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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
beforescriptexecute event | Chrome No support No | Edge ? | Firefox Full support 2 | IE ? | Opera No support No | Safari No support No | WebView Android No support No | Chrome Android No support No | Firefox Android Full support 4 | Opera Android No support No | Safari iOS No support No | Samsung Internet Android No support No |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.