"beforeload" should be "beforeunload"
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winiex 2017-06-10 16:52:41 +08:00 committed by GitHub
parent 3f9fecf51b
commit a1757f9555

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@ -238,7 +238,7 @@ Page lifecycle events:
- All scripts are executed except those that are external with `async` or `defer`
- Images and other resources may still continue loading.
- `load` event on `window` triggers when the page and all resources are loaded. We rarely use it, because there's usually no need to wait for so long.
- `beforeload` event on `window` triggers when the user wants to leave the page. If it returns a string, the browser shows a question whether the user really wants to leave or not.
- `beforeunload` event on `window` triggers when the user wants to leave the page. If it returns a string, the browser shows a question whether the user really wants to leave or not.
- `unload` event on `window` triggers when the user is finally leaving, in the handler we can only do simple things that do not involve delays or asking a user. Because of that limitation, it's rarely used.
- `document.readyState` is the current state of the document, changes can be tracked in the `readystatechange` event:
- `loading` -- the document is loading.