<section id="description">
<p>Прошлая задача показала, что React может управлять внутренним состоянием для определенных элементов, таких как <code>input</code> и <code>textarea</code> , что делает их контролируемыми компонентами. Это относится и к другим элементам формы, включая обычный элемент <code>form</code> HTML.</p></section>

class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line

    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */ }

          { /* change code above this line */ }
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */ }

        { /* change code above this line */ }
      </div>
    );
  }
};


index

Создание управляемой формы

Create a Controlled Form

<code>MyForm</code> should return a <code>div</code> element which contains a <code>form</code> and an <code>h1</code> tag. The form should include an <code>input</code> and a <code>button</code>.

The state of <code>MyForm</code> should initialize with <code>input</code> and <code>submit</code> properties, both set to empty strings.

Typing in the <code>input</code> element should update the <code>input</code> property of the component&apos;s state.

Submitting the form should run <code>handleSubmit</code> which should set the <code>submit</code> property in state equal to the current input.

The <code>h1</code> header should render the value of the <code>submit</code> field from the component&apos;s state.

front-end-libraries

React

class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line
    event.preventDefault();
    this.setState({
      submit: this.state.input,
    })

    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */}

          <input onChange={this.handleChange} value={this.state.input} />

          { /* change code above this line */}
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */}
        <h1>{this.state.submit}</h1>

        { /* change code above this line */}
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    event.preventDefault()
    this.setState({
      submit: this.state.input
    });
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          <input
            value={this.state.input}
            onChange={this.handleChange} />
          <button type='submit'>Submit!</button>
        </form>
        <h1>{this.state.submit}</h1>
      </div>
    );
  }
};



class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line  
     event.preventDefault();
     this.setState({
      submit: this.state.input
    });
    
    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */ }
 <input type="text" value={this.state.input} onChange={this.handleChange} />
          { /* change code above this line */ }
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */ }
          <h1>{this.state.submit}</h1>
        { /* change code above this line */ }
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line
    event.preventDefault();
    this.setState({submit: this.state.input})
    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */ }
          <input value={this.state.input} onChange={this.handleChange}></input>
          { /* change code above this line */ }
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */ }
        <h1>{this.state.submit}</h1>
        { /* change code above this line */ }
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line
    event.preventDefault();
    this.setState({...this.state, submit: this.state.input})
    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */ }
          <input type='text' value={this.state.input} onChange={this.handleChange} />
          { /* change code above this line */ }
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */ }
        <h1>{this.state.submit}</h1>
        { /* change code above this line */ }
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    event.preventDefault()
    // change code below this line
    this.setState({
      submit: this.state.input
    })
    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */ }
          <input value={this.state.input} onChange={this.handleChange} ></input>
          { /* change code above this line */ }
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */ }
        <h1>{this.state.submit}</h1>
        { /* change code above this line */ }
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line
    event.preventDefault();
    this.setState({
      submit: this.state.input
    })
    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */ }
          <input value={this.state.input} onChange={this.handleChange}/>
          { /* change code above this line */ }
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */ }
        <h1>{this.state.submit}</h1>
        { /* change code above this line */ }
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line
    event.preventDefault()
    this.setState({
      submit: this.state.input
    })
    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit} >
          { /* change code below this line */}
          <input value={this.state.input} onChange={this.handleChange} />
          { /* change code above this line */}
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */}
        <h1>{this.state.submit}</h1>
        { /* change code above this line */}
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line
    this.setState({
      submit: this.state.input
    });
    event.preventDefault()
    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */ }
          <input type="text" onChange={this.handleChange} value={this.state.input} />
          { /* change code above this line */ }
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */ }
        <h1>{this.state.submit}</h1>
        { /* change code above this line */ }
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    console.log("event", {...event})
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    event.preventDefault()
    this.setState({
      submit: this.state.input
    });
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          <input
            value={this.state.input}
            onChange={this.handleChange} />
          <button type='submit'>Submit!</button>
        </form>
        <h1>{this.state.submit}</h1>
      </div>
    );
  }
};



class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line
    event.preventDefault();
    this.setState({submit: this.state.input});

    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */ }
          <input onChange={this.handleChange} value={this.state.input}/>
          { /* change code above this line */ }
          <button  type='submit'>Submit!</button>
        </form>
        { /* change code below this line */ }
        <h1>{this.state.submit}</h1>
        { /* change code above this line */ }
      </div>
    );
  }
};


class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      input: '',
      submit: ''
    };
    this.handleChange = this.handleChange.bind(this);
    this.handleSubmit = this.handleSubmit.bind(this);
  }
  handleChange(event) {
    this.setState({
      input: event.target.value
    });
  }
  handleSubmit(event) {
    // change code below this line
    event.preventDefault();
    this.setState({
      submit: this.state.input,
    })

    // change code above this line
  }
  render() {
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          { /* change code below this line */}

        <input onChange={this.handleChange} value={this.state.input} />

          { /* change code above this line */}
          <button type='submit'>Submit!</button>
        </form>
        { /* change code below this line */}
        <h1>{this.state.submit}</h1>

        { /* change code above this line */}
      </div>
    );
  }
};
