Run results for: conditionally insert properties

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; SM-G950U1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.66 Mobile Safari/537.36

Browser: Chrome Mobile 90

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Tests:

boring
const obj = { hello: "world" }; if (Math.random()>.5) { obj.foo = "bar"; }
spread
const obj = { hello: "world", ...Math.random()>.5 && { foo: "bar" } };
Object.assign
const obj = Object.assign({ hello: "world" }, Math.random()>.5 && { foo: "bar" });