React: Bug: Dropped update when render phase update happens before suspending
Sandbox: https://codesandbox.io/s/cranky-kapitsa-op3jh
Repro: type "a" and then after a second "b"
Expected: Eventually you'll see "ab" in all fields. Pending "..." indicator goes away.
Actual: You'll keep seeing "a" in low pri field. Pending "..." indicator is stuck.
gaearon
All 2 comments
Sandbox: https://codesandbox.io/s/nostalgic-gauss-xrn4o (If I understand problem correctly)
Why didn't you update mirror text with useEffect?
VakoNonikashvili
on 4 Apr 2020
Generally saying, render phase updates are better for derived state because you don鈥檛 need an extra rendering pass for the whole subtree.
In either case, it doesn鈥檛 matter how else I could write it. The problem is that this uncovers a bug in React, and bugs need to be fixed.
gaearon
on 4 Apr 2020
👍3
Was this page helpful?
0 / 5 - 0 ratings
Related issues
framerate
路
3Comments
tleunen
路
3Comments
jimfb
路
3Comments
jvorcak
路
3Comments
trusktr
路
3Comments
Most helpful comment
Generally saying, render phase updates are better for derived state because you don鈥檛 need an extra rendering pass for the whole subtree.
In either case, it doesn鈥檛 matter how else I could write it. The problem is that this uncovers a bug in React, and bugs need to be fixed.