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UnitControl: forward onBlur prop as expected #39589

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merged 5 commits into from Mar 23, 2022

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ciampo
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@ciampo ciampo commented Mar 18, 2022

What?

Make the UnitControl component call the onBlur prop when either the quantity or unit inputs fire the blur event.

Why?

While working on #39522, I realised that UnitControl doesn't forward the onBlur prop, despite declaring it in its types.

How?

The current approach is to call the onBlur prop when either the underlying quantity input or the unit select lose focus.

Alternative approaches would be:

  • remove the onBlur prop from UnitControl's types
  • add 2 separate blur-related callbacks, something like onQuantityBlur and onUnitBlur

Testing Instructions

1. Apply this patch
index 87dfd3a84c..2459da2993 100644
--- a/packages/components/src/unit-control/stories/index.tsx
+++ b/packages/components/src/unit-control/stories/index.tsx
@@ -62,6 +62,9 @@ const DefaultTemplate: ComponentStory< typeof UnitControl > = ( {
 					setValue( v );
 					onChange?.( v, extra );
 				} }
+				onBlur={ ( event ) => {
+					console.log( 'Hello', event );
+				} }
 			/>
 		</div>
 	);
  1. Open UnitControls Storybook example
  2. Move the keyboard focus around, paying particular attention to how the onBlur callback gets fired when iteracting with the quantity input and the unit select

@ciampo ciampo added [Type] Enhancement A suggestion for improvement. [Package] Components /packages/components [Feature] Component System WordPress component system labels Mar 18, 2022
@ciampo ciampo requested a review from ajitbohra as a code owner March 18, 2022 17:46
@ciampo ciampo self-assigned this Mar 18, 2022
@ciampo ciampo added this to In progress (owned) ⏳ in WordPress Components via automation Mar 18, 2022
@ciampo ciampo requested review from mirka, stokesman, andrewserong and aaronrobertshaw and removed request for ajitbohra March 18, 2022 17:47
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@aaronrobertshaw aaronrobertshaw left a comment

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Thanks for this fix @ciampo 👍

The onBlur prop gets called when I would expect it to. Personally, I prefer this PR's option over the alternatives listed in the description.

I had one question regarding the calling of mayUpdateUnit within handleOnBlur and left that as an inline comment.

Should we also document the onBlur prop in the README.md?

@ciampo ciampo changed the title UnitControl: actually call onBlur prop UnitControl: forward onBlur prop as expected Mar 21, 2022
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@stokesman stokesman left a comment

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This looks good and tests well for me. I agree the chosen approach is better than the alternatives listed in the description. I think it'd be good to move forward with this approach for now.

I also think it warrants a follow up about consistency with our other composite components. For instance, one of the first things I thought to check when reviewing this was how it's handled in RangeControl. There, focus and blur are only forwarded from the range input and not the number input. So that one feels a bit lacking as well.

@ciampo ciampo force-pushed the fix/unit-control-call-onblur-before-onmounting branch from fc61272 to 76d95c8 Compare March 21, 2022 16:36
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ciampo commented Mar 21, 2022

Thank you both for validating the current approach for when to fire the onBlur callback.

I went ahead and:

  • rebased to solve a conflict
  • listed the onBlur prop in the README
  • added unit tests

I had one question regarding the calling of mayUpdateUnit within handleOnBlur and left that as an inline comment.

I replied to that comment, but I'll wait for @aaronrobertshaw's reply to make sure that we're on the same page.

I also think it warrants a follow up about consistency with our other composite components.

That's a great point. I've opened #39615 to start keeping track of it

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github-actions bot commented Mar 21, 2022

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The added unit tests are great and I verified they fail without the changes from fe212af.

packages/components/src/unit-control/test/index.js Outdated Show resolved Hide resolved
@ciampo ciampo merged commit 943cec9 into trunk Mar 23, 2022
WordPress Components automation moved this from In progress (owned) ⏳ to Done 🎉 Mar 23, 2022
@ciampo ciampo deleted the fix/unit-control-call-onblur-before-onmounting branch March 23, 2022 18:51
@github-actions github-actions bot added this to the Gutenberg 13.0 milestone Mar 23, 2022
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