3 Aug 2020 A JavaScript object is like a real-world entity having state and behavior, for example, a car. We can take a car as an object. It will have a state like 

var phone = {merk:["Iphone", "Samsung", "Sony Ericson"], color:["Black", "White", "Red"]};. // console.log (phone.merk[0], phone.color[1]);. // var number = 12;.

In this example we create  14 Jun 2018 For example, how do JavaScript engines implement the JavaScript object model, and which tricks do they use to speed up accessing  18 Jun 2019 What is a JavaScript Object. Objects in JavaScript consist of key/value pairs of any type, and they are similar to a Dictionaries in Python,  20 Jun 2018 Once in a while, you may need to loop through Objects in JavaScript. The only way to do so before ES6 is with a `forin` loop. The problem with  2 Jul 2018 An object is a type of data in JavaScript.

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So we must understand them first before going in-depth anywhere else. An object can be created with figure brackets {…} with an optional list of properties. 2020-02-20 · Object.keys () Method The Object.keys () method was introduced in ES6. It takes the object that you want to iterate over as an argument and returns an array containing all properties names (or keys). You can then use any of the array looping methods, such as forEach (), to iterate through the array and retrieve the value of each property. Objects in JavaScript are collections of key / value pairs. The values can consist of properties and methods, and may contain all other JavaScript data types, such as strings, numbers, and Booleans.

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