- Test your JavaScript skills and knowledge with our extensive base of programming tests and questions
- Learn and improve your JavaScript skills and knowledge by reading explanations assigned to each programming question to help you understand the concept
- extend your programming knowledge by reading our articles about JavaScript topics
- save your favorite JavaScript tests to your favorite list
- Create your own JavaScript quizzes with technical questions that are in our database
- become an author and add your own JavaScript questions and tests and help other to improve their coding skills

Quizes and questions are divided by the level: beginner, intermediate and advanced.

This application does not contain official JavaScript tests, but it will definitely help you prepare for technical interview and get your dream position of a JavaScript developer.

Whether you are an experienced or beginner software programmer, this application is for everyone who wants to learn and expand their knowledge of the JavaScript programming language.

This application can be useful to:
- prepare for the JavaScript programming exam
- fill knowledge gaps about JavaScript language
- prepare for the JavaScript technical job interview
- practice your JavaScript coding skills

Join 13,000 users who are already learning the JavaScript programming language with us.

You can find programming questions related to:

- JavaScript
- ECMAScript 6 (ECMAScript 2015)
- CSS
- HTML
- React
- Angular
- AngularJS
- TypeScript
- Node
- MongoDB
- Git
- Java
- PHP

Example subjects:
- JavaScript - variables and data types, operator, conditions and loops, arrays, functions, objects, scope, this, hoisting, arguments, NaN, regular expressions, null, undefined, closure, apply/call/bind, new and prototype, iife, strict and non-strict mode, delete operator, type of operator, WebSockets, Fetch API, cookies, XHR and Ajax, session and local storage, async and await

- ES6 - promises, let/const, template strings, arrow function, rest and spread, classes and inheritance, modules, default parameter values, symbol, generators, array/object destructuring, Set, Map

- CSS - selectors, specificity, pseudo classes and pseudo elements, box model, shorthand properties, stacking context, margin collapsing, floating, positioning, units, gradients, block vs inline elements, font styling, inheritance

- HTML - links, lists, elements, tables, forms, images, audio and video tag, iframes, global attributes, doctype and DTD

- TypeScript - enums, types, interfaces, classes, generics, union, tuple

- Angular - binding, components, directives, pipes, modules, template-driven forms and reactive forms, Angular CLI, services, routing, @Input/@Output, guards, lifecycle hooks

- React - components and props, JSX, handling events, state, Refs

- Node - modules, fs, http, npm