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Ilya Kantor 2019-07-06 11:52:58 +03:00
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2-ui/5-loading/01-onload-ondomcontentloaded/article.md
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@ -150,12 +150,12 @@ window.addEventListener("unload", function() {
```
- The request is sent as POST.
- We can send not only a string, but also forms and other formats, as described in the chapter <info:fetch-basics>, but usually it's a stringified object.
- We can send not only a string, but also forms and other formats, as described in the chapter <info:fetch>, but usually it's a stringified object.
- The data is limited by 64kb.
When the `sendBeacon` request is finished, the browser probably has already left the document, so there's no way to get server response (which is usually empty for analytics).
There's also a `keepalive` flag for doing such "after-page-left" requests in [fetch](info:fetch-basics) method for generic network requests. You can find more information in the chapter <info:fetch-api>.
There's also a `keepalive` flag for doing such "after-page-left" requests in [fetch](info:fetch) method for generic network requests. You can find more information in the chapter <info:fetch-api>.
If we want to cancel the transition to another page, we can't do it here. But we can use another event -- `onbeforeunload`.