Run results for: Test 03

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Tests:

One
const obj = { key1: 'value1', key2: 'value2' }; if ('key1' in obj) { console.log('key1 exists in obj'); } else { console.log('key1 does not exist in obj'); }
Two
const obj = { key1: 'value1', key2: 'value2' }; if (obj.hasOwnProperty('key1')) { console.log('key1 exists in obj'); } else { console.log('key1 does not exist in obj'); }
Three
const obj = { key1: 'value1', key2: 'value2' }; if (typeof obj.key1 !== 'undefined') { console.log('key1 exists in obj'); } else { console.log('key1 does not exist in obj'); }