Stylelint 16.13: Cannot read properties of undefined (reading 'toLowerCase')

[carlosjeurissen]

When using stylelint-a11y with Stylelint 16.13, the following error shows up:

__tests__/index.test.js > flags warnings with invalid css > correct rule flagged
TypeError: Cannot read properties of undefined (reading 'toLowerCase')
 ❯ <input css T8jugF>:1:1
 ❯ isStandardSyntaxAtRule node_modules/.pnpm/stylelint@16.13.1_typescript@5.6.3/node_modules/stylelint/lib/utils/isStandardSyntaxAtRule.mjs:9:18
 ❯ node_modules/.pnpm/@double-great+stylelint-a11y@3.0.2_stylelint@16.13.1_typescript@5.6.3_/node_modules/@double-great/stylelint-a11y/src/rules/no-spread-text/index.js:45:12
 ❯ node_modules/.pnpm/postcss@8.4.49/node_modules/postcss/lib/container.js:377:18
 ❯ node_modules/.pnpm/postcss@8.4.49/node_modules/postcss/lib/container.js:305:18
 ❯ Root.each node_modules/.pnpm/postcss@8.4.49/node_modules/postcss/lib/container.js:53:16
 ❯ Root.walk node_modules/.pnpm/postcss@8.4.49/node_modules/postcss/lib/container.js:302:17
 ❯ Root.walkRules node_modules/.pnpm/postcss@8.4.49/node_modules/postcss/lib/container.js:375:19
 ❯ node_modules/.pnpm/@double-great+stylelint-a11y@3.0.2_stylelint@16.13.1_typescript@5.6.3_/node_modules/@double-great/stylelint-a11y/src/rules/no-spread-text/index.js:42:10
 ❯ runRule node_modules/.pnpm/stylelint@16.13.1_typescript@5.6.3/node_modules/stylelint/lib/lintPostcssResult.mjs:120:11

[lee-chase]

Just hit this going through my regular updates. It became an issue in Stylelint 16.13.0 (16.12.0 still works).

[jsnmrs]

Confirming that with #69 and version 3.0.3, I'm no longer encountering TypeError: Cannot read properties of undefined (reading 'toLowerCase') in Stylelint 16.13.10.

Appreciate the fix @sushichan044

[lee-chase]

Thanks @jsnmrs @sushichan044 can confirm I am able to update to stylelint 16.13.2 without error using 3.0.3.

[carlosjeurissen]

Thanks for fixing this!