Reactjs

How to get input field value on button click in reactjs?

Get input field value on button click in reactjs

reactjs
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Hello, welcome to therichpost.com. In this post, I will tell you, How to get input field value on button click in reactjs? Reactjs is a Javascript Library to build user interface.

In this post, I made simple form and input field and input button. On button click, I am getting the input box value and this is tricky and in future post, I will do more this form.

Here is the working code and you need to add this into your index.js file:
import React from 'react';
import ReactDOM from 'react-dom';

class Hello extends React.Component{
    constructor(props)
    {
      super(props);
      this.state = {value: ''};
      this.addValue = this.addValue.bind(this);
      this.updateInput = this.updateInput.bind(this);
    }
    
    addValue(evt)
    {
      evt.preventDefault();
      if(this.state.value !=undefined)
      {
        alert('Your input value is: ' + this.state.value)
      }
    }
    updateInput(evt){
      this.state={value: evt.target.value};   
        }
    
    render()
    {
      return (
      <form onSubmit={this.addValue}>
      <input type="text" onChange={this.updateInput} /><br/><br/>
      <input type="submit" value="Click Me :)"/>
      </form>
      )
    }
  }

  ReactDOM.render(<Hello />, document.getElementById('root'));

 I will do this post in parts and I can say this is the first part and In future posts, I will do more with reactjs. If you have any query related to this post then please comment below.

Ajay Malhotra
the authorAjay Malhotra
Hello to all. Welcome to therichpost.com. Myself Ajay Malhotra and I am full stack developer. I love coding. I know Wordpress, Core php, Angularjs, Angular 2, Angular 6, Angular 7, laravel, Codeigniter, Shopify, Squarespace, Jquery, Google Map Api, Vuejs, Reactjs, Bigcommerce etc.

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