You can use the class keyword to define a new class in JavaScript instead of a function constructor and then use the new keyword to create an instance. Let us look at the following example: class User { constru
So far, we have gone through how to define functions using thefunctionkeyword. However, there is a newer, more concise method of defining a function known asarrow function expressionsas ofECMAScript 6. Arrow functions, as they are commonly known, are represented by an equals sign followed by ...
We define a newUser object that we intend to assign and to add to the users array. The push() method is then called on the users array, passing newUser as the argument. This method adds the value newUser to the end of the users array. Finally, console.log() prints the updated arra...
Unlike other programming languages,JavaScript functions are objects. In other words, it is an instance of theFunctiontype. Consequently, it has properties and methods like other objects. Also, the name of a function is merely a pointer that points to the function object. Let's discuss in the ...
Add Items and Objects to an Array Using the Assignment Operator in JavaScript To add items and objects to an array, you can use the assignment operator in JavaScript. You have to use the index to define the position inside the array where you want to put the item or object. If an exist...
Iterate the properties using a loopHow to inspect in Node.jsLet’s say we have this object car, but we don’t know its content, and we want to inspect it:const car = { color: 'black', manufacturer: 'Ford', model: 'Fiesta' }The Console API...
But with Express.js (and Connect.js) came the idea of ‘middleware’. In my opinion, middleware is the best way to define components on the server. If you want to compare it to a known pattern, it’s pretty close to pipes and filters. The basic idea is that your component is part...
In the above examples, we do not control the property descriptor. That means it uses the default descriptor behaviour. Object property can be writable, re-configurable and enumerable. If we need control over all these, then we need to define the property using defineProperty() or definePropertie...
You are calling the Fetch API and passing in the URL to the JSONPlaceholder API. Then a response is received. However, the response you get is not JSON, but an object with a series of methods that can be used depending on what you want to do with the information. To convert the objec...
<<script src="https://unpkg.com/axios/dist/axios.min.js"></script> After installing Axios, you can begin making HTTP requests in your application. This is as simple as importing the axios function and passing a configuration (config) object to it: import axios from "axios" axios({ metho...