rails-with-react-new-post-3.jsx

// app/javascript/components/NewPost.js

import React from 'react'

class NewPost extends React.Component {
  state = {
    title: '',
    body: ''
  }

  handleChange = event => {
    this.setState({ [event.target.name]: event.target.value });
  }

  render() {
    return (
      <div>
        <h1>New Post</h1>
        <form>
            <input
              name="title"
              onChange={this.handleChange}
              placeholder="title"
              type="text"
            />
            <input
              name="body"
              onChange={this.handleChange}
              placeholder="body"
              type="text"
            />
          <button>Create Post</button>
        </form>
      </div>
    )
  }
}

export default NewPost