Run results for: validate undefined 3

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.129 Safari/537.36

Browser: Chrome 81

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Script Preparation code:

var data = { parentNode: true }

Tests:

data.parentNode
if (data.parentNode) { data.parentNode = true; }
data.parentNode !== undefined
if (data.parentNode !== undefined) { data.parentNode = true; }
data.parentNode != undefined
if (data.parentNode != undefined) { data.parentNode = true; }