Run results for: undefined vs. typeof vs. in vs. hasOwnProperty (Object.create(null))

Run details:

User agent: Mozilla/5.0 (iPhone; CPU OS 14_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/33.0 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 14

Operating system: iOS 14.2

Device Platform: Mobile

Date tested: 3 years ago

Script Preparation code:

var obj = Object.assign(Object.create(null), {
    a: 1,
    b: 2,
    c: 3,
    d: 4,
    e: 5
});

Tests: