Run results for: Javascript iterate object keys

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser: Chrome 69

Operating system: Windows

Device Platform: Desktop

Date tested: 5 years ago

Script Preparation code:

var testObj = {};
for (let i = 0; i < 20; ++i) {
  testObj[`k${i}`] = i;
}

Tests:

Object keys foreach
Object.keys(testObj).forEach(key => console.log(key));
for in
for (let key in testObj) { console.log(key) }
for in hasOwnProperty
for (let key in testObj) { if (testObj.hasOwnProperty(key)) { console.log(key); } }