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import React, { Component } from 'react';  import { render } from 'react-dom';    const TextInput = React.forwardRef((props, ref) => (    <input type="text" placeholder="Hello World" ref={ref} />  ));    const inputRef = React.createRef();    class CustomTextInput extends React.Component {    handleSubmit = e => {      e.preventDefault();      console.log(inputRef.current.value);    };    render() {      return (        <div>          <form onSubmit={e => this.handleSubmit(e)}>            <TextInput ref={inputRef} />            <button>Submit</button>          </form>        </div>      );    }  }  export default App;

Question

import React, { Component } from 'react';  import { render } from 'react-dom';    const TextInput = React.forwardRef((props, ref) => (    <input type="text" placeholder="Hello World" ref={ref} />  ));    const inputRef = React.createRef();    class CustomTextInput extends React.Component {    handleSubmit = e => {      e.preventDefault();      console.log(inputRef.current.value);    };    render() {      return (        <div>          <form onSubmit={e => this.handleSubmit(e)}>            <TextInput ref={inputRef} />            <button>Submit</button>          </form>        </div>      );    }  }  export default App;

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Solution

The code you've posted is written in JavaScript, specifically using the React library. It defines a text input component and a form that uses this input. When the form is submitted, it logs the current value of the text input.

Here's a step-by-step breakdown:

  1. TextInput is a functional component that uses the forwardRef function from React to pass a ref to the input element. This allows us to directly interact with the DOM element.

  2. inputRef is a reference object created using React.createRef(). This will be used to access the value of the input field.

  3. CustomTextInput is a class component. It has a method handleSubmit that prevents the default form submission behavior and logs the current value of the input field referenced by inputRef.

  4. In the render method of CustomTextInput, a form is returned. The form contains the TextInput component and a submit button. The onSubmit prop of the form is set to the handleSubmit method.

  5. The ref prop of TextInput is set to inputRef, which means the inputRef now points to the actual input DOM element.

  6. The CustomTextInput component is exported as a default export.

Please note that the last line export default App; seems to be a mistake as there is no App component defined in the provided code. It should be export default CustomTextInput; instead.

This problem has been solved

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