Gutenberg: [ Latest Posts ] Max. number of words control doesn't react to keyboard input

[bph]

Describe the bug
The default value for excerpt display is 55 words. There are three methods available, it seems, to modify that number in the sidebar
1) Slider
2) up/down 1
3) Type in a new value.

The third method, typing in a new value, doesn't work.

To reproduce
Steps to reproduce the behavior:

1. Insert Latest Posts block
2. Open the Block settings sidebar
3. Enable Post Content
4. Check Excerpt
5. Try modify the number of words displayed with the keyboard

Expected behavior
I would have expected that I would be able to modify the number by typing in the right value.

Screenshots

Desktop (please complete the following information):

• OS: [e.g. iOS] 10.15.3
• Browser [e.g. chrome, safari] Chrome
• Version [e.g. 22] 80.0.3987.163

Additional context
Gutenberg 7.8.1
WordPress 5.4

[draganescu]

I tested this and can confirm this is a bug.

[kirilzh]

It’s happening because

<RangeControl
    min={ MIN_EXCERPT_LENGTH }
    max={ MAX_EXCERPT_LENGTH }
/>

has 10-100 set as lower and upper bounds. Whenever you try to go single digit it would prevent you from typing. Same goes when you exceed 100. I was thinking maybe to make it from 1-100 because it would make fixing ones easier and also maybe show a tooltip whenever an invalid number is typed. Also when should a fallback value be set? If there’s no lower bound, emptying the field is allowed, which currently automatically sets it to 50.

[aduth]

@kirilzh I seem to recall that the component previously had built-in logic which would allow for temporary "violations" of the validation. It was implemented in #12952, I believe (cc @jorgefilipecosta). It looks like the changes in the refactoring in #19916 removed some of the logic around this, perhaps inadvertently regressing this intended behavior:

https://github.com/WordPress/gutenberg/pull/19916/files#diff-d9d2996da619bb1351e858132191dbbeL51

cc @ItsJonQ

With a fix, it would be good to have some automated tests which verify this behavior, to avoid potential future regressions.

[ItsJonQ]

@aduth Thank you for the heads up! I wasn't aware of this use case. I'll look into it now!

[ItsJonQ]

Just submitted a PR for the fix 🙏
https://github.com/WordPress/gutenberg/pull/22084