README.md

Dynamic Render In React Application

This repo will teach how to to load your react application from a JSON configuration.

First you need to understand, why we need to go for the dynamic rendering.

1. Code Reusability: You can make reusable components using dynamic rendering
2. Just update the configuration after the base setup is done, so that, it will dynamically render.

How we are doing this?

This can be achieve using React.createElement

Step 1: Create two components first:

1. Card
2. Button

Card.jsx

import React from "react";

function Card({ children }) {
  return (
    <React.Fragment>
      <div>Main</div>
      <div>{children}</div>
    </React.Fragment>
  );
}

export default Card;

Then Button.jsx

import React from "react";

function Button() {
  return <div>MyButton</div>;
}

export default Button;

Step 2: Create a json configuration for your app

AppConfig.js

export const APP_CONFIG = [
  {
    component: "card",
    children: [
      {
        component: "button",
        children: "hello",
      },
    ],
  },
];

Step 3: Map your component to a key

KeysToComponentMap.jsx

import Button from "../components/Button";
import Card from "../components/Card";

export const KeysToComponentMap = {
  card: Card,
  button: Button,
};

Step 4: Add a dynamic render component

DynamicRender.jsx

import React from "react";
import { KeysToComponentMap } from "../app_config/KeysToComponentMap";

function DynamicRender(config) {
  if (typeof KeysToComponentMap[config.component] !== "undefined") {
    return React.createElement(
      KeysToComponentMap[config.component],
      {},
      config.children &&
        (typeof config.children === "string"
          ? config.children
          : config.children.map((c) => DynamicRender(c)))
    );
  }
  return null;
}

export default DynamicRender;

Step 5: Call this in your App.js file using React.createElement

import { APP_CONFIG } from "./app_config/AppConfig";
import DynamicRender from "./dynamic/DynamicRender";

function App() {
  return (
    <div className="App">
      <div className="card-container">
        {APP_CONFIG.map((config) => DynamicRender(config))}
      </div>
    </div>
  );
}

export default App;