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fix: preserve source when removing nested values #807

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fix: preserve source when removing nested values #807

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5 changes: 4 additions & 1 deletion src/utils/set.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,10 @@ function internalSet<Entity = any, Output = Entity, Value = any>(

// Delete prop if `removeIfUndefined` and value is undefined
if (removeIfUndefined && value === undefined && restPath.length === 1) {
delete clone[path][restPath[0]];
const origin = clone[path];
const child = Array.isArray(origin) ? [...origin] : { ...origin };
delete child[restPath[0]];
clone[path] = child;
} else {
clone[path] = internalSet(clone[path], restPath, value, removeIfUndefined);
}
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12 changes: 5 additions & 7 deletions tests/utils.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -59,14 +59,12 @@ describe('utils', () => {
expect(set({}, ['notExist'], undefined, true)).toEqual({});

// Delete value
const target = set(
{ keep: { light: 2333 } },
['keep', 'light'],
undefined,
true,
);
expect(target).toEqual({ keep: {} });
const source = { keep: { light: 2333, bamboo: 1 } };
const target = set(source, ['keep', 'light'], undefined, true);
expect(target).toEqual({ keep: { bamboo: 1 } });
expect('light' in target.keep).toBeFalsy();
expect(source).toEqual({ keep: { light: 2333, bamboo: 1 } });
expect(target.keep).not.toBe(source.keep);

// Mid path not exist
const midTgt = set(
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