How to implement a "Read More" link in React

React.js has a component-based architecture that offers a flexible environment for manipulating components to improve user interactivity. This provides a separation of concerns and allows to display data dynamically according to the requirements.

The basic concept behind "Read More"

The "Read More" link is basically used to keep the user interface less overwhelming for the user. The convention is to display the important information on the main page and give a "Read More" link with it for users who wish to know more about the corresponding topic.

We can implement the "Read More" link in React through two different approaches.

  1. Through state management

  2. Through React Routing

Let's use the "Read More" link on the following webpage using both approaches one by one.

Default display on the webpage.
Default display on the webpage.

Through state management

We use React useState hook to render the "Read More" component to the parent component, Info.js.

In this example, the readMore state variable is used to set the state to true when the "Read More" button is clicked. Once the state is set to true, the ReadMore.js component is rendered in the main file.

"Read More" component is rendered in the parent component.
"Read More" component is rendered in the parent component.

Let's code the "Read More" link using the state management approach to achieve the output shown above.

const ReadMore = () => {
    return (
        <div>
           <br/>
            <label>Educative.io is an online learning platform that offers interactive and practical information on technical topics.
                  It improves user productivity by providing various courses and answers for the commonly encountered queries, and 
                  provides an efficient learning experience. View Educative Answers at  <href> https://www.educative.io/answers</href>
            </label>
        </div>
    )
}

export default ReadMore;
Read More link implemented using useState.

Code explanation

  • Lines 2–3: Import useState and "Read More" components.

  • Line 7: Declare a useState hook with readMore state variable and setReadMore function to change the state.

  • Line 14: Create a "Read More" link using href tag and set the state to true when the link is clicked.

  • Line 15: If the readMore state is set to true then render the ReadMore component.

Through React-Router

We use React-Routing to dynamically change the route and open the webpage corresponding to the path defined in Link.

In this example, A Link for "Read More" is created that dynamically changes the URL to /ReadMore which displays the ReadMore component on the webpage.

Redirects to /ReadMore URL that displays ReadMore component.
Redirects to /ReadMore URL that displays ReadMore component.

Let's code the "Read More" link using the React-Router approach to achieve the output shown above.

import { BrowserRouter as Router, Routes, Route } from "react-router-dom";

import Info from './Info';
import ReadMore from './ReadMore';

const App = () => {

return(
    <Router>
      <Routes>
        <Route path = "/" element = {<Info/>}/>
        <Route path = "/ReadMore" element = {<ReadMore/>}  />

      </Routes>
    </Router>
)
}

export default App;
Read More link implemented using React Router.

Code explanation

App.js:

  • Line 1: Import BrowserRouter components from the react-router-dom library.

  • Lines 2–3: Import Info and ReadMore components to the parent component.

  • Line 11: Create a route with a default path for Info components. '/' is a default path that displays the Info.js component as the default interface for the application.

  • Line 12: Create a route with a defined path for ReadMore components. '/ReadMore' is the route that displays the ReadMore.js component when the link in Info.js is clicked.

Info.js:

  • Line 2: Import Link component from the react-router-dom library.

  • Line 11: Create a link that takes the user to /ReadMore URL where the ReadMore.js component is displayed.

Common query

Question

Which approach should be used to prevent component rendering or overriding?

Show Answer

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