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Update Spacer block minimum width/height #49188

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@stokesman stokesman commented Mar 20, 2023

What?

Prevents Spacer blocks from being zero width or height and sets a practical minimum size that varies according the the unit. Secondarily, some changes propose to share more logic between web and RN and eliminate one inconsistency between the two.

Why?

  • It’s not a spacer unless it takes up space.
  • Will also close Spacer shows null in the dimension tooltip #47418.
  • There is funny margin collapsing that can happen on block-based themes when the size is zero. It's correct in that it acts the same way on the front end but it’s funky in the editor.

How?

The hook useCustomUnits was already in use for the Spacer block. Its return value includes a step value for each of the units and that has been coopted for use as the minimum size. The constant that was previously used for all the units was 0 is changed to 1 and only used as the fallback in case step does not exist for a unit (very edge case).

Testing Instructions

  1. Insert a Spacer block into the editor.
  2. Try sizing it to zero with either the draggable in-canvas size control or the inspector control.
  3. Verify that the block will not size below a minimum (that’s dependent on the unit).

Testing Instructions for Keyboard

  1. Tab to the “Height” control in the inspector controls.
  2. Enter “0” or use the arrow keys to try changing the value to 0.
  3. Verify that the block will not size below a minimum (that’s dependent on the unit).

Screenshots or screencast

Before

spacer-minimums-before.mp4

After

spacer-minimums-after.mp4
@stokesman stokesman added [Package] Block library /packages/block-library [Block] Spacer Affects the Spacer Block labels Mar 20, 2023
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github-actions bot commented Mar 20, 2023

Size Change: +73 B (0%)

Total Size: 1.34 MB

Filename Size Change
build/block-library/index.min.js 201 kB +73 B (0%)
ℹ️ View Unchanged
Filename Size
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compressed-size-action

@stokesman stokesman marked this pull request as ready for review March 20, 2023 06:41
@stokesman stokesman closed this Jun 12, 2024
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Labels
[Block] Spacer Affects the Spacer Block [Package] Block library /packages/block-library
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