“Saring tidak terdefinisi dari javascript objek” Kode Jawaban

Saring tidak terdefinisi dari javascript objek

const obj = {key1: undefined, key2: '', key3: 0, key4: null}

Object.keys(obj).forEach(key => obj[key] === undefined ? delete obj[key] : {});

// obj is now without key1 i.e. {key2: '', key3: 0, key4: null}