“FORJS Periksa apakah kunci di JSON” Kode Jawaban

FORJS Periksa apakah kunci di JSON

var json = {key1: 'value1', key2: 'value2'}

"key1" in json ? console.log('key exists') : console.log('unknown key')

"key3" in json ? console.log('key exists') : console.log('unknown key')