bug: thumbnail not being properly sized when slotted inside item

[Yohandah]

Bug Report

Ionic version:
[x] 5.x

Current behavior:

The ionic docs says :

Thumbnails can be used by themselves or inside of any element. If placed inside of an ion-item, the thumbnail will resize to fit the parent component

But when a ion-thumbnail is inside a ion-item and slotted, it doesn't fit the ion-item, instead it forces its size to 56px which makes the ion-item height 56px.

If we want to make the thumbnail smaller we can use the --size attribute, but it is overridden by the code above when slotted.

I add the size attribute :

The ion-thumbnail size attribute is overridden by the slotted css :

Expected behavior:

The size attribute shouldn't be overridden ?
Why force the height/width to 56px when slotted ?

Steps to reproduce:

Go to : https://ionicframework.com/docs/api/thumbnail

• With your browser, inspect a thumbnail in the example in the top right corner
• Set a --size attribute to a value, for example 20px
• The thumbnail doesn't change its size

[dotNetkow]

To expand on this with a code example for reproduction, I also tried ion-item's min-height property to make the parent (ion item) larger. It didn't work though.

ion-item {
  --min-height: 200px; // or any large size
}

ion-thumbnail {
  --size: 108px;  // this should take effect but doesn't
  --border-radius: 12px;
}

<ion-item>
  <ion-thumbnail slot="start">
     <img src="path"/>
   </ion-thumbnail>
</ion-item>

[dotNetkow]

As a workaround, I directly set the height and width of the ion-thumbnail:

.thumbnail {
  height: 108px;
  width: 108px;
}

[idesignpixels]

Still an issue in Ionic 6.19.0

[ionitron-bot]

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