Run results for: Object.assign vs spread operator

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:67.0) Gecko/20100101 Firefox/67.0

Browser: Firefox 67

Operating system: Mac OS X 10.14

Device Platform: Desktop

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";