JSFiddle - React, Tailwind, and code Playground

JavaScript

function SomeBaseClass(){ this.publicProperty='SomeValue'; }
SomeBaseClass.prototype = {
    doThis : function(){},
    doThat : function(){}
}
    
function MyClass(){}
MyClass.prototype = new SomeBaseClass();
var obj=new MyClass();
console.log(obj.publicProperty);
console.log(obj);