The React community advocates certain design patterns. Developers are free to choose the design pattern of their choice. The React library is just a UI library, and it doesn't implement any special patterns for writing a complex application. The virtual DOM will be merged and rendered in the container. ReactDOM.render processes JSX or React Elements and emits virtual DOM. The React app calls the reactdom.render method, bypassing the user interface created using the React component ( coded in JSX or React Elementor format) and the container to render the user interface. ReactDOM.render(, document.getElementById('react-app') ) īy analyzing the application, we can visualize the workflow of the React application, as shown in the below diagram. Open a command prompt and go to your workspace. Let us understand the workflow of a React application in this chapter by creating and analyzing a simple React application. Let us learn more about components in the React Component chapter. React components can be able to do simple as well as advanced logic. React components have properties, state management, lifecycle and event handlers. React Component is a JavaScript class (extends the React Component class) or a pure JavaScript function. It uses React Elements and JSX to design its user interface. React components are the primary building block of React applications. JSX can be compiled for React Elements and used to build user interfaces. JSX is an XML based, extensible language that supports HTML syntax with slight modifications. JSXĪ JavaScript extension for designing user interfaces. React provides an API, React.createElement to create React Element. Instead of introducing a new template language, React introduces three simple concepts as below - React elements Typically, each user interface library introduces a new template language (which we need to learn) for designing user interfaces and provides the option to write logic inside the template or separately. The primary objective of React is to enable the developer to create user interfaces using pure JavaScript. As we learned earlier, React is a library for creating user interfaces in a web application. I think you’ll find it quite refreshing to use React A) with a JSX-like syntax, and B) without any kind of build tooling.The React library is built on a solid foundation. So pick your poison.Īnyway, this might be a long-winded way of stating something most folks already know. Plus it doesn’t give you the ability to start splitting out your components into individual JavaScript modules. render(īut this imports babel into the browser and transforms on the fly. At the time of this writing, that’s what the React docs show you how to do it for basic examples, i.e.: ReactDOM. Granted, you can author in JSX and ship it directly to the browser. (Once we get stuff like import maps you wouldn’t even have to do this.) I import the libraries in one place and export them for use in other files. For example, having a deps.js file makes it so I don’t have to write out those long CDN URLs all the time. Then my index.js file: import ` īut as I mentioned, I like splitting the JavaScript out into individual modules because it helps me expand and grow the functionality over time. If it becomes viable longer term, I then consider factoring in a build process, removing my dependence on React, etc.įirst, I have my root HTML file ( index.html): Title of Your Page This is a great place to start with an idea. The code I write is the code that ships to the browser. It allows me to leverage React and write JSX-like syntax without any dependence on a build tool. Ok, so, with that context in mind, I have this little boilerplate I’ve pieced together from a couple different sources (big thanks to the preact docs). computer-“can I get this working?”-and I find that I’ll move heaven and earth just to see something work only to realize that what I wanted to do was building something usable in a browser, not optimize and streamline my “DX”. It’s like I immediately forget that I was trying to build something useful and instead it becomes a fight of nerd vs. The moment configurations, build processes, and what not get involved, those become the focus of my attention. Using a framework like React can make doing that incredibly easy-as long as there is no build tooling involved. I find myself quite often needing to prototype something really quick, sometimes even build an “MVP” of something I can put out into the world for feedback. First off: this is mostly a reference for myself.
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