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10 changes: 10 additions & 0 deletions packages/core/src/mergeClasses.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -227,6 +227,16 @@ describe('mergeClasses', () => {
expect(mergeClasses(classNameA, classNameC)).toMatchInlineSnapshot(`fe3e8s9`);
expect(mergeClasses(classNameA, classNameB, classNameC)).toMatchInlineSnapshot(`ftu9nv0`);
});

it('handles resets for shorthands', () => {
const computeClassesA = makeStyles({ root: { transitionDuration: '1s' } });
const computeClassesB = makeStyles({ root: { color: 'red', transition: RESET } });

const classNameA = computeClassesA(options).root;
const classNameB = computeClassesB(options).root;

expect(mergeClasses(classNameA, classNameB)).toMatchInlineSnapshot(`fe3e8s9`);
});
});
});

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4 changes: 4 additions & 0 deletions packages/core/src/runtime/resolveStyleRules.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -905,6 +905,10 @@ describe('resolveStyleRules', () => {
{ sj55zd: 'fe3e8s9', uwmqm3: 0 },
{ d: ['.fe3e8s9{color:red;}'] },
]);
expect(resolveStyleRules({ color: 'red', transition: RESET })).toEqual([
{ B3o57yi: 0, Bi2q7bf: 0, Bkqvd7p: 0, Bmy1vo4: 0, Bn62ygk: 0, Cwk7ip: 0, sj55zd: 'fe3e8s9' },
{ d: ['.fe3e8s9{color:red;}'] },
]);
});
});

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23 changes: 13 additions & 10 deletions packages/core/src/runtime/resolveStyleRules.ts
Original file line number Diff line number Diff line change
Expand Up @@ -113,18 +113,17 @@ export function resolveStyleRules(
continue;
}

if (isResetValue(value)) {
if (typeof value === 'string' || typeof value === 'number') {
const isReset = isResetValue(value);

const selector = trimSelector(selectors.join(''));
const shorthand = getShorthandDefinition(property);
// uniq key based on a hash of property & selector, used for merging later
const key = hashPropertyKey(selector, property, atRules);

pushToClassesMap(cssClassesMap, key, 0, undefined);
continue;
}

if (typeof value === 'string' || typeof value === 'number') {
const selector = trimSelector(selectors.join(''));
const shorthand = getShorthandDefinition(property);
if (isReset) {
pushToClassesMap(cssClassesMap, key, 0, undefined);
}

if (shorthand) {
const shorthandProperties = shorthand[1];
Expand All @@ -133,8 +132,12 @@ export function resolveStyleRules(
resolveStyleRules(shorthandResetStyles, classNameHashSalt, selectors, atRules, cssClassesMap, cssRulesByBucket);
}

// uniq key based on a hash of property & selector, used for merging later
const key = hashPropertyKey(selector, property, atRules);
// Heads up!
// We don't need to generate CSS rules for reset values as they are not used in the output
if (isReset) {
continue;
}

const className = hashClassName(
{
value: value.toString(),
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