JSFiddle - React, Tailwind, and code Playground

HTML

<h1> 
    <p id="demo"> paragraph </p>
</h1>

JavaScript

var obj1 = {name : "總裁實字",
            height : 170,
            say: function(){
                return "I am " + obj1.name;
            }
           },
    result = obj1.say();

document.getElementById("demo").innerHTML = result;

function Person(name){
    //var this = {};
    this.name = name;
    this.say = function(){
        return "I am " + this.name;
    };
    //return this;
};

var adam = new Person("海綿寶寶");
console.log(adam.say());