Run results for: Object.assign vs spread operator

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.1.0; SM-G610F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.105 Mobile Safari/537.36

Browser: Chrome Mobile 72

Operating system: Android 8.1.0

Device Platform: Mobile

Date tested: 5 years ago

Tests:

Object.assign
var params = { b:"hello", c: true, d:7 }; var other = Object.assign({ a: 2 }, params);
spread operator
var params = { b:"hello", c: true, d:7 }; var other = { a: 2, ...params };
jQuery extend
var params = { b:"hello", c: true, d:7 }; var other = $.extend({ a: 2 }, params);
Manual Update
var params = { b:"hello", c: true, d:7 }; params.a = 2; params.b = "NEW TEXT";