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preactjs / preact

⚛️ Fast 3kB React alternative with the same modern API. Components & Virtual DOM.
https://preactjs.com
MIT License
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preact@10.20.2 application is broken on old user agents #4415

Closed adrian-wozniak closed 3 months ago

adrian-wozniak commented 3 months ago

Describe the bug Change https://github.com/preactjs/preact/pull/4318 caused that application is not rendered correctly on old user agents. Some of the components blink until they are finally rendered some of them are not rendered at all.

It turned out that isConnected API is not widely available and old user agents are no longer capable of rendering preact app properly.

To Reproduce

One of the user agents I faced that problem is Opera/9.80 (Linux mips; ce-html/1.0) Presto/2.12.407 Version/12.50 HbbTV/1.3.1 (; Humax; fvp4000t; UKTFAE 1.03.54; 1.0.0; wired) ce-html/1.0 FVC/1.0 (Humax; fvp4000t;). isConnected property is undefined.

Expected behavior Application should be rendered properly.

JoviDeCroock commented 3 months ago

It's available in 95% - however Preact X has to support IE11 so we have to find a solution for that. Thank you for reporting

adrian-wozniak commented 3 months ago

@JoviDeCroock you are right, 95% definitely means "widely" 😅. I meant that it is not supported by all actively used user agents :). Anyway, thanks for handling that!