If you're creating a résumé page for your personal website, it will most likely be sufficient to write it in vanilla JavaScript, HTML 5, and some creative CSS style sheets that make it look special and unique. And if you're creating the jobs page of your company's official website, doing it barehanded might work. But if you use a number of frameworks to style the page and to process logic and animations, you will find yourself in a much better position that you can still go home from work earlier than usual and enjoy a cup of coffee with friends at the weekend. And if you're building something likeMonster (https://www.monster.com/) I hope that you are not just carrying those favorite frameworks with you to the battlefield, and if you go barehanded, you wouldn't even make it there. With the level of complexity of such an application and the fact that you will need to keep improving or changing features because of the neverending stop-change requirements, you need to bring the tools for modern web application development with you.
Note
Sometimes, people use the term vanilla JavaScript to refer to using plain JavaScript without any additional libraries, such as jQuery, Lodash, and many more. That means that you write your code with only the APIs that the JavaScript language itself provides.
In this book, we will create a modern web application called TaskAgile, which is a Trello-like application for task management. Let's first get an overview of the technologies that we will use to build it.
For the frontend, we will use Vue.js 2 as our frontend application framework, Bootstrap 4 as the UI framework, and we will write our frontend in ES6, also known as ECMAScript 2015, or ES 2015, and then use Babel to compile it into ES5 code. We will use ESLint to check our JS code to make sure it follows all the rules we defined and use Flow (https://flow.org) for static type checking. We will use Jest to write our frontend unit testing's and use Nightwatch.js to run our end-to-end test cases. We will use webpack 4 to bundle all the dependencies and use npm to take care of the package management.
For the backend, we will use Spring Boot 2 to create a Spring 5 application. And we will use Hibernate 5 as our object-relational mapping (ORM) framework, and MySQL as our database. We will use Spring Security for authentication and authorization, and we will implement a real-time-update feature with Spring WebSocket. We will use Spring AMPQ for asynchronously processing background tasks and Spring Session for server-side session management.
Now, before we introduce Vue.js 2 and Spring 5, for readers who are not familiar with JavaScript, let's learn the basics of it, starting with the part that Java developers would easily get confused with.