Make state immutable in tutorial (eek)

12 years ago · ee83ad9f88
1 changed files with 2 additions and 2 deletions
--- a/docs/tutorial.md
+++ b/docs/tutorial.md
@ -629,8 +629,8 @@ var CommentBox = React.createClass({
  },
  handleCommentSubmit: function(comment) {
    var comments = this.state.data;
-    comments.push(comment);
-    this.setState({data: comments});
+    var newComments = comments.concat([comment]);
+    this.setState({data: newComments});
    $.ajax({
      url: this.props.url,
      type: 'POST',