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Improve native createTheme token normalization #489

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yaminyassin wants to merge 1 commit into from
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Improve native createTheme token normalization #489

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7 changes: 5 additions & 2 deletions packages/react-strict-dom/src/native/css/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -50,15 +50,18 @@ function _create<S extends { +[string]: { +[string]: unknown } }>(styles: S): {
}
export const create: IStyleX['create'] = _create as $FlowFixMe;

const RE_CAPTURE_VAR_NAME = /^var\(--(.*)\)$/;
const VAR_FUNCTION_PREFIX = 'var(--';
export const createTheme = (
baseTokens: Tokens,
overrides: CustomProperties
): CustomProperties => {
const result: MutableCustomProperties = { $$theme: 'theme' };
for (const key in baseTokens) {
const varName: string = baseTokens[key];
const normalizedKey = varName.replace(RE_CAPTURE_VAR_NAME, '$1');
const normalizedKey =
varName.startsWith(VAR_FUNCTION_PREFIX) && varName.endsWith(')')
? varName.slice(VAR_FUNCTION_PREFIX.length, -1)
: varName;
result[normalizedKey] = overrides[key];
}
return result;
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