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HTML

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HTML

              
                #disclaimer
  h1 This is not your regular comment section
  p This looks like a comment section, feels like a comment section, but nothing you write there will make it outside of your computer. You will keep seeing your comments, but there will be a little less noise on the web.
#root
              
            
!

CSS

              
                html,
body
  width: 100%
  height: 100%
  margin: 0
  padding: 0
  background-color: rgb(50, 51, 59)

#disclaimer
  max-width: 650px
  margin: 20px auto
  color: #CCCCCC
  font-family: sans-serif
#root
  padding: 20px
  
.comments-void__form
  max-width: 800px
  margin: 40px auto

.comments-void__form-name
  display: inline-block
  width: 100%
  height: 30px
  border: 1px solid coral
  border-top-left-radius: 5px
  background-color: transparent
  color: white
  padding: 5px 10px
  margin: 0
  box-sizing: border-box
  font-size: 16px
  font-family: sans-serif

.comments-void__form-comment
  display: inline-block
  width: 100%
  height: 70px
  border: 1px solid coral
  border-top: none
  border-bottom-left-radius: 5px
  background-color: transparent
  color: white
  padding: 5px 10px
  margin: 0
  box-sizing: border-box
  resize: none
  font-size: 16px
  font-family: sans-serif
  
.comments-void__form
  fieldset
    display: inline-block
    box-sizing: border-box
    width: calc(85% - 2px)
    vertical-align: top
    padding: 0
    margin: 0
    border: none
  button
    display: inline-block
    box-sizing: border-box
    width: calc(15% - 2px)
    height: 100px
    vertical-align: top
    background-color: coral
    color: rgb(50, 51, 59)
    padding: 0
    margin: 0
    border: none
    border-top-right-radius: 5px
    border-bottom-right-radius: 5px
    cursor: pointer
    font-family: sans-serif
    font-size: 18px
    font-weight: bold
    &:hover
      background-color: #ff7f50
  
.comments-void__list
  list-style: none
  max-width: 800px
  margin: 40px auto
  padding: 5px 10px
  box-sizing: border-box
  text-align: left
  color: #ccc
  
.comments-void__list-item
  margin: 0
  padding: 5px
  box-sizing: border-box
  font-family: sans-serif
  &:hover
    background-color: rgba(255,255,255,0.1)
  span
    margin: 0
    padding: 0
    box-sizing: border-box
    margin-right: 20px
    font-weight: bold
              
            
!

JS

              
                class CommentForm extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
      comment: '',
      author: ''
    }

    this.handleChange = this.handleChange.bind(this)
    this.handleSubmit = this.handleSubmit.bind(this)
  }

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

  handleSubmit(event) {
    event.preventDefault()
    this.props.post({author: this.state.author, content: this.state.comment})
    this.setState({comment: ''})
  }

  render() {
    return (
      <form className="comments-void__form" onSubmit={this.handleSubmit}>
        <fieldset>
          <input name="author" className="comments-void__form-name" placeholder="Your name" onChange={this.handleChange} value={this.state.author} />
          <textarea name="comment" className="comments-void__form-comment" placeholder="Your comment here..." onChange={this.handleChange} value={this.state.comment}></textarea>
        </fieldset>
        <button>Send</button>
      </form>
    )
  }
}

class Comment extends React.Component {
  render() {
    return <li className="comments-void__list-item"><span>{this.props.author}</span> {this.props.comment}</li>
  }
}

class CommentsList extends React.Component {
  render() {
    return (
      <ul className="comments-void__list">
        {this.props.comments.map((comment, index) =>
          <Comment key={index} author={comment.author} comment={comment.content} />
        )}
      </ul>
    )
  }
}

class CommentIntoTheVoid extends React.Component {
  constructor(props) {
    super(props)

    let comments = localStorage.getItem('comments') ?
      JSON.parse(localStorage.getItem('comments')) :
      []

    this.state = {comments: comments}

    this.postComment = this.postComment.bind(this)
  }

  postComment(newComment) {
    let comments = this.state.comments
    comments.push(newComment)
    this.setState({comments: comments})
    localStorage.setItem('comments', JSON.stringify(comments))
  }

  render() {
    return (
      <div className="comments-void">
        <CommentForm post={this.postComment} />
        <CommentsList comments={this.state.comments} />
      </div>
    )
  }
}

ReactDOM.render( 
  <CommentIntoTheVoid />,
  document.getElementById('root')
)
              
            
!
999px

Console