sql-server-samples/samples/features/json/reactjs/nodejs-comments-app/wwwroot/scripts/example.js

/**
 * This file provided by Facebook is for non-commercial testing and evaluation
 * purposes only. Facebook reserves all rights not expressly granted.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

var Comment = React.createClass({
    rawMarkup: function() {
        var md = new Remarkable();
        var rawMarkup = md.render(this.props.children.toString());
        return { __html: rawMarkup };
    },

    render: function() {
        return (
          <div className="comment">
            <h2 className="commentAuthor">
              {this.props.author}
            </h2>
            <span dangerouslySetInnerHTML={this.rawMarkup()} />
          </div>
      );
    }
});

var CommentBox = React.createClass({
    loadCommentsFromServer: function() {
        $.ajax({
            url: this.props.url,
            dataType: 'json',
            cache: false,
            success: function(data) {
                this.setState({data: data});
            }.bind(this),
            error: function(xhr, status, err) {
                console.error(this.props.url, status, err.toString());
            }.bind(this)
        });
    },
    handleCommentSubmit: function(comment) {
        var comments = this.state.data;
        // Optimistically set an id on the new comment. It will be replaced by an
        // id generated by the server. In a production application you would likely
        // not use Date.now() for this and would have a more robust system in place.
        comment.id = Date.now();
        var newComments = comments.concat([comment]);
        this.setState({data: newComments});
        $.ajax({
            url: this.props.url,
            dataType: 'json',
            type: 'POST',
            data: comment,
            success: function(data) {
                this.setState({data: data});
            }.bind(this),
            error: function(xhr, status, err) {
                this.setState({data: comments});
                console.error(this.props.url, status, err.toString());
            }.bind(this)
        });
    },
    getInitialState: function() {
        return {data: []};
    },
    componentDidMount: function() {
        this.loadCommentsFromServer();
        setInterval(this.loadCommentsFromServer, this.props.pollInterval);
    },
    render: function() {
        return (
          <div className="commentBox">
            <h1>Comments</h1>
            <CommentList data={this.state.data} />
            <CommentForm onCommentSubmit={this.handleCommentSubmit} />
          </div>
      );
    }
});

var CommentList = React.createClass({
    render: function() {
        var commentNodes = this.props.data.map(function(comment) {
            return (
              <Comment author={comment.author} key={comment.id}>
            {comment.text}
          </Comment>
      );
});
return (
  <div className="commentList">
    {commentNodes}
  </div>
    );
}
});

var CommentForm = React.createClass({
    getInitialState: function() {
        return {author: '', text: ''};
    },
    handleAuthorChange: function(e) {
        this.setState({author: e.target.value});
    },
    handleTextChange: function(e) {
        this.setState({text: e.target.value});
    },
    handleSubmit: function(e) {
        e.preventDefault();
        var author = this.state.author.trim();
        var text = this.state.text.trim();
        if (!text || !author) {
            return;
        }
        this.props.onCommentSubmit({author: author, text: text});
        this.setState({author: '', text: ''});
    },
    render: function() {
        return (
          <form className="commentForm" onSubmit={this.handleSubmit}>
          <input
          type="text"
          placeholder="Your name"
          value={this.state.author}
          onChange={this.handleAuthorChange}
        />
        <input
          type="text"
          placeholder="Say something..."
          value={this.state.text}
          onChange={this.handleTextChange}
        />
        <input type="submit" value="Post" />
      </form>
    );
}
});

ReactDOM.render(
  <CommentBox url="/api/comments" pollInterval={2000} />,
  document.getElementById('content')
);