z-index/declaration-property-value-allowed-list

Disallows declaration of `z-index` values that are not Polaris z-index tokens.

Use Polaris tokens instead of custom styles so that z- is consistent across the Admin. This helps merchants have a coherent user experience and also ensures that z- is in sync with the design system.

Example
// Do
+ z-index: var(--p-z-index-1);
// Don't
- z-index: 1;

Contribute

Have you found that merchants benefit from styles or components that aren't in Polaris? We'd love to learn more. You can jumpstart a contribution to Polaris in GitHub by:

Ignore failure

If styles are intentionally designed to diverge from Polaris and it isn't viable to contribute back to the design system, you can ignore the failing rule. Make sure to provide context as to why you are writing custom styles with a disable description.

Example
// stylelint-disable-next-line -- why custom styles are being used instead of Polaris

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