Run results for: if(number) vs if(number == 1) vs if(number != 0) vs if(number === 0) vs if(number !== 0)

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36

Browser: Chrome 89

Operating system: Windows 7

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

const ns = window.ns = []
for (let i = 1000; i; --i) ns.push(i % 2)

Tests:

if(number)
for (const x of ns) { if (x) { console.log('odd') } else { console.log('even') } }
if(number == 1)
for (const x of ns) { if (x == 1) { console.log('odd') } else { console.log('even') } }
if(number != 0)
for (const x of ns) { if (x != 0) { console.log('odd') } else { console.log('even') } }
if(number === 1)
for (const x of ns) { if (x === 1) { console.log('odd') } else { console.log('even') } }
if(number !== 0)
for (const x of ns) { if (x !== 0) { console.log('odd') } else { console.log('even') } }