JSFiddle - React, Tailwind, and code Playground

by shravan

JavaScript

var person1 = {
    name: "Nicholas",
    sayName: function() {
        console.log(this.name);
    }
};

console.log("sayName" in person1); // true

console.log("name" in person1); // true
console.log(person1.hasOwnProperty("name")); // true

console.log("toString" in person1); // true
console.log(person1.hasOwnProperty("toString")); // false

var property;
for (property in person1) {
    console.log("Name: " + property);
    console.log("Value: " + person1[property]);
}