JSFiddle - React, Tailwind, and code Playground

JavaScript

function myMethod(options) {
    var myObj = {
        prop1: 'data1',
        prop2: 'data3',
        prop3: 'data4',
    };

    if (options) {
        $.extend(myObj, options);
    }
    
    console.log(myObj);
}

myMethod({prop1:"newData1", prop2:"newData2"});