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fix: 🐛 BUG: class:list directive adding class attribute when undefined (#4867)

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* Update hydration.ts

* Create lucky-comics-bow.md
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Rishi Raj Jain 2022-09-26 22:23:07 +05:30 committed by GitHub
parent 5fc73ba02c
commit 03e8b750ad
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2 changed files with 9 additions and 2 deletions
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5
.changeset/lucky-comics-bow.md Normal file
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@ -0,0 +1,5 @@
---
'astro': patch
---
check if class:list's value is defined before converting

6
packages/astro/src/runtime/server/hydration.ts
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@ -92,8 +92,10 @@ export function extractDirectives(inputProps: Record<string | number, any>): Ext
}
}
} else if (key === 'class:list') {
// support "class" from an expression passed into a component (#782)
extracted.props[key.slice(0, -5)] = serializeListValue(value);
if (value) {
// support "class" from an expression passed into a component (#782)
extracted.props[key.slice(0, -5)] = serializeListValue(value);
}
} else {
extracted.props[key] = value;
}