Run results for: undefined vs. typeof vs. in vs. hasOwnProperty

Run details:

User agent: Mozilla/5.0 (Android 11; Mobile; rv:90.0) Gecko/90.0 Firefox/90.0

Browser: Firefox Mobile 90

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Script Preparation code:

var obj = { a: 1, b: 2, c: 3, d: 4, e: 5 };

Tests: