MadLittleMods / MadLittleMods/postcss-css-variables

Inherited calculation not using correctly scoped variable

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bug
Dominant language
JavaScript
Stars
551
Forks
63
PR merge metrics
No merged PRs in 30d

Description

## I enter following:

``` css
:root {
--aaa: 2;
--bbb: calc(var(--aaa) * 2);
}

.btn {
--aaa: 3;
width: var(--aaa);
height: var(--bbb);
}

.btn:hover {
--aaa: 4;
}
```

and receive:

``` css
.btn {
width: 3;
height: calc(4 * 2); /*here is the error, it should be 3*2*/
}

.btn:hover {
height: calc(4 * 2);
}

.btn:hover {
width: 4;
}
```

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the CSS example from the issue with the postcss-css-variables plugin and inspect the transformation path for inherited custom properties. Done means the generated .btn height uses calc(3 * 2), while .btn:hover keeps the expected scoped behavior, with a regression test covering the example.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
frontend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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