CollapsiblePanel: panel's content doesn't grow over the full container's width

[ahmehri]

Describe the bug
CollapsiblePanel's content doesn't grow over the full container's width.

To Reproduce
Steps to reproduce the behavior:

Check the following code:

import {
  Card,
  CollapsiblePanel, Spacings, TextField
} from "@commercetools-frontend/ui-kit";

<CollapsiblePanel
  header={
    <CollapsiblePanel.Header>Collapsible Panel Header</CollapsiblePanel.Header>
  }
>
  <Spacings.Inline>
    <Card type="flat">
      <TextField name="variant-sku" title="SKU" horizontalConstraint={11} />
    </Card>
    <Card type="flat">
      <TextField name="variant-key" title="Key" horizontalConstraint={11} />
    </Card>
  </Spacings.Inline>
</CollapsiblePanel>;

Expected behavior
CollapsiblePanel's content should grow over the full container's width.

Screenshots

[ahmehri]

The panel's content is a Flex container:

ui-kit/packages/components/collapsible-panel/src/collapsible-panel.styles.tsx

Lines 86 to 92 in c2e53b7

	const SectionContent = styled.div`
	width: 100%;
	display: flex;
	flex-wrap: wrap;
	align-items: flex-start;
	`;

The content's items (Flex items) are not growing over the container's width because the default value for flex-grow is being used, which is 0.

I think it's reasonable to expect that the panel's content should grow over the full panel's width, which means that a potential fix for the bug is to start using the value 1 for flex-grow.

[emmenko]

Thanks for reporting. We'll take a look at this and see what we can do.

[mmaltsev-ct]

In order to decide regarding the implementation, we'll check the usage of this component in the MC (both in the code and in the UI)

[kark]

Thank you again for reporting this issue.
I am wondering if a wrapper component used with your proposed solution might be an acceptable solution:

import styled from "@emotion/styled";

const Wrapper = styled.span`
  flex-grow: 1;
`;

<CollapsiblePanel
      header={
        <CollapsiblePanel.Header>
          Collapsible Panel Header
        </CollapsiblePanel.Header>
      }
    >
      <Wrapper>
        <Spacings.Inline>
          ...
        </Spacings.Inline>
      </Wrapper>
</CollapsiblePanel>

without changes to the CollapsiblePanel component imposing flex-grow e.g. in case of vertically stacked layouts that perhaps might not be preferable:

It would be great to hear your opinion about it.

[ahmehri]

Sorry for the late reply.

That's already the workaround that we use (although by using the ui-kit Constraints.Horizontal component instead).

As I expressed in #2048 (comment). I think it makes sense to expect that the panel's content should grow over the full panel's width. This will still work even for vertically stacked layouts.

[kark]

Thank you for your reply and sharing another solution.
Let me share our train of thought on that.
From the UX point of view CollapsiblePanel is a wrapper component rendering any node passed as a children prop as they are. It seems we should not impose how children are presented.

Again, please consider:

• there might be cases where it might not be preferable (e.g. vertically stacked layouts mentioned before)
  The end effect would always be like:

while we might want:

• we now have multiple ways of doing that in the client code 🎉

However, we will look upon adding an optional prop to CollapsiblePanel as an enhancement if we collect more requests like this.

[ahmehri]

Thanks, I think the issue is more about providing better defaults. I think the panel's content growing over its full width is a better default. With this default, having vertically stacked layouts is still possible as shown in https://codesandbox.io/s/commercetools-ui-kit-2048-5w86f6?file=/src/App.js.

[kark]

Many thanks again for your reply and providing the code sample. We will need more time for researching how the defaults would influence all the use cases