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Reactjs Data Binding Working Example

by therichpost
Reactjs Data Binding Working Example

Hello friends, welcome back to my blog. Today in this blog post, I am going to show you, Reactjs Data Binding Working Example.

Guys in this working post, I am binding two select inputs. for proper understanding please check this video first.

React Data Binding
Reactjs Data Binding Working Example
Reactjs Data Binding Working Example

For reactjs new comers, please check the below link:

Reactjs Basic Tutorials

Bootstrap 5 Tutorials

Friends now I proceed onwards and here is the working code snippet and please use this carefully to avoid the mistakes:

1. Firstly, we need fresh reactjs setup and for that, we need to run below commands into out terminal and also we should have latest node version installed on our system:

npx create-react-app reacttricks

cd reacttricks

2. Now we need to run below commands into our project terminal to get bootstrap(optional, I am using to make application looks good) and related modules into our reactjs application:

npm install bootstrap --save

npm start //For start project

3. Finally for the main output, we need to add below code into our reacttricks/src/App.js file or if you have fresh setup then you can replace reacttricks/src/App.js file code with below code:

import React from 'react';

import "./App.css";
class App extends React.Component {
  constructor() {
    this.state = { value: 10 };

  //select onchange event to get and set value
  handleChange = (e) => {
    this.setState({ value: e.target.value });
  render() {
    return (
      <div className="container p-5">
       <h1 className="mb-4">therichpost.com</h1>
       <div class="mb-3">
         <label class="form-label">Grade</label>
           <select id="grade" value={this.state.value}
             onChange={this.handleChange} class="form-select mb-5">
                <option value="select Grade">  Select Grade  </option>
                <option value="10">O</option>
                <option value="9">A+</option>
                <option value="8">A</option>
                <option value="7">B+</option>
                <option value="6">B</option>
                <option value="0">RA</option>

      <div class="mb-3">
         <label class="form-label">Credit</label>
          <select id="credit" value={this.state.value} class="form-select">
                    <option disabled={this.state.value != "select Grade" ? true : false} value="select Credit">  Select Credit  </option>
                    <option disabled={this.state.value != 10 ? true : false} value="10">10</option>
                    <option disabled={this.state.value != 9 ? true : false} value="9">9</option>
                    <option disabled={this.state.value != 8 ? true : false} value="8">8</option>
                    <option disabled={this.state.value != 7 ? true : false} value="7">7</option>
                    <option disabled={this.state.value != 6 ? true : false} value="6">6</option>
                    <option disabled={this.state.value != 0 ? true : false} value="0">0</option>

export default App;

4. Guys now we need to add below code into our reacttricks/src/App.css file to set custom styles:

#credit option:disabled{
    display: none;

Now we are done friends. If you have any kind of query or suggestion or any requirement then feel free to comment below.

Note: Friends, I just tell the basic setup and things, you can change the code according to your requirements.

I will appreciate that if you will tell your views for this post. Nothing matters if your views will be good or bad.



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Mohamed Mansoor B May 22, 2021 - 12:20 pm

Hey, the code really helped me, thanks budd!

Ajay Malhotra May 22, 2021 - 12:23 pm



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