25 lines
736 B
Markdown
25 lines
736 B
Markdown
### cleanObj
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Removes any properties except the ones specified from a JSON object.
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Use `Object.keys()` method to loop over given JSON object and deleting keys that are not included in given array.
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If you pass a special key,`childIndicator`, it will search deeply apply the function to inner objects, too.
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```js
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const cleanObj = (obj, keysToKeep = [], childIndicator) => {
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Object.keys(obj).forEach(key => {
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if (key === childIndicator) {
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cleanObj(obj[key], keysToKeep, childIndicator);
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} else if (!keysToKeep.includes(key)) {
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delete obj[key];
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}
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});
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return obj;
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};
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```
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```js
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const testObj = { a: 1, b: 2, children: { a: 1, b: 2 } };
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cleanObj(testObj, ['a'], 'children'); // { a: 1, children : { a: 1}}
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```
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