get value of input react

1import { useState } from 'react';
2
3function myFunctionalComponentFunction() {
4  const [input, setInput] = useState(''); // '' is the initial state value
5  return (
6    <div>
7    <label>Please specify:</label>
8    <input value={input} onInput={e => setInput(e.target.value)}/>
9    </div>
10  );
11}
12

1const input = props => {
2
3let textInput = React.createRef();
4
5function handleClick() {
6  console.log(textInput.current.value);
7}
8
9return (
10    <div>
11      <input ref={textInput} placeholder="Type a message..." />
12      <div onClick={handleClick} className="icon">
13        <i className="fa fa-play" />
14      </div>
15    </div>
16  )
17}

1class NameForm extends React.Component {
2  constructor(props) {
3    super(props);
4    this.state = {value: ''};
5    this.handleChange = this.handleChange.bind(this);
6    this.handleSubmit = this.handleSubmit.bind(this);
7  }
8
9  handleChange(event) {    this.setState({value: event.target.value});  }
10  handleSubmit(event) {
11    alert('A name was submitted: ' + this.state.value);
12    event.preventDefault();
13  }
14
15  render() {
16    return (
17      <form onSubmit={this.handleSubmit}>
18        <label>
19          Name:
20          <input type="text" value={this.state.value} onChange={this.handleChange} />        </label>
21        <input type="submit" value="Submit" />
22      </form>
23    );
24  }
25}

1class NameForm extends React.Component {
2  constructor(props) {
3    super(props);
4    this.state = {value: ''};
5
6    this.handleChange = this.handleChange.bind(this);
7  }
8
9  handleChange(event) {
10    this.setState({value: event.target.value});
11  }
12
13  render() {
14    return (
15      <form>
16        <label>
17          Name:
18          <input type="text" value={this.state.value} onChange={this.handleChange} />
19        </label>
20        <input type="submit" value="Submit" />
21      </form>
22    );
23  }
24}