Render Methods in React JS

Render Methods in React JS: Chances are that to some degree, you’ve already split up your app into compartments when you were building regular HTML JavaScript applications. Then, you used Ajax events to populate each view separately, based on what type of data changed in each HTML element cell. But React takes this approach one step further by requiring render() method.

Render Methods in React JS

The render method must be attached to each React component you create. There is no way around it. It’s part of the pattern that React components demand that is being used. Even though React is so much more than the view layer – making the render method explicit to programming with React, is the reason why React is often considered to be primarily a view-based library.

React is a programming pattern that follows a fundamental philosophy that actually doesn’t require a view. You can render results of a react component either to a browser or to a string of text (using a method made just for that, called React.renderToString.) JSON (JavaScript Object Notation) object or anywhere else you wish.

In this case, rendering isn’t rendering at all. Because the word render implies the visualization of data. So React is more like a set of principles, rather than “a way to make User Interfaces” as many beginners tend to believe after brief familiarity with the library. While you can use any third-party library in addition to React, for example, database IO libraries, React still offers a lot in the way of custom programming that goes behind the view elements. In fact, it demands that you understand how this programming principles work.



The method render() which is usually attached to the React’s own “virtual” DOM is the method that will be executed when your application is loaded into the browser for the first time. And consequently, only when the data in the element it represents should be updated.

How ever, this is where it gets interesting. Until the render method is called, the react’s component isn’t even “mounted” to the actually JavaScript DOM, nor will it be displayed. And it’s possible to create React components without mounting them.

We know that the render() method triggers an update of the data set (or state of the component). But when should the data be updated? This will depend on the type of data shown in your components but also a few generic functions that are responsible for updating while it’s being used.