don't rerender on hover for collapse/expand link

public/custom.css

@@ -1,3 +1,15 @@
 .replies {
   margin-left: 1em;
 }
+a:hover {
+  text-decoration: none;
+  color: #007bff;
+}
+.comment-meta a {
+  display: none;
+}
+.comment-meta:hover a {
+  display: inline;
+  text-decoration: none;
+  color: #007bff;
+}

src/Components/Comments/SingleComment/ExpandedComment.js

@@ -3,18 +3,13 @@ import CommentReply from './CommentReply'
 
 const ExpandedComment = props => {
   return (
-    <li
-      className=""
-      key={props.id}
-      onMouseEnter={() => props.showCollapseLink(props.id, true)}
-      onMouseLeave={() => props.showCollapseLink(props.id, false)}
-    >
+    <li key={props.id}>
       <div id="media-image" className="media bg bg-dark">
         <img alt="profile" src="anon.jpeg" height={64} />
 
         <div id="media-body" className="media-body ml-3 my-auto">
           <a href="#user">username</a>
-          <div className="text-white-50">
+          <div className="comment-meta text-white-50">
             <small>{props.createdAt}</small>
             {props.replies.length > 0 ? (
               <a
@@ -22,7 +17,6 @@ const ExpandedComment = props => {
                 className="ml-3"
                 style={{
                   fontVariant: 'small-caps',
-                  display: props.displayCollapse || 'none',
                 }}
                 onClick={() =>
                   props.toggleCollapse(props.id, !props.collapsedThread)

src/Components/Comments/index.js

@@ -7,19 +7,9 @@ class ThreadList extends React.Component {
     super()
     this.state = { activeReplyId: null }
     this.toggleCollapse = this.toggleCollapse.bind(this)
-    this.showCollapseLink = this.showCollapseLink.bind(this)
     this.showReply = this.showReply.bind(this)
   }
 
-  showCollapseLink(id, collapsed) {
-    this.setState({ displayCollapse: 'block' })
-    const otherComments = this.props.comments.filter(c => c.id !== id)
-    const comment = this.props.comments.find(c => c.id === id)
-    comment['displayCollapse'] = collapsed
-    //console.log('displayed collapse for: ', comment)
-    this.setState({ comments: otherComments.concat(comment) })
-  }
-
   toggleCollapse(id, collapsed) {
     const otherComments = this.props.comments.filter(c => c.id !== id)
     var parent = this.props.comments.find(c => c.id === id)
@@ -70,7 +60,6 @@ class ThreadList extends React.Component {
             <div className="ml-3" key={uuid()}>
               <SingleComment
                 threadLevel={this.props.threadLevel}
-                showCollapseLink={this.showCollapseLink}
                 toggleCollapse={this.toggleCollapse}
                 showReply={this.showReply}
                 submitComment={this.props.submitComment}
@@ -80,7 +69,6 @@ class ThreadList extends React.Component {
               {comment.replies && (
                 <ThreadList
                   threadLevel={comment.id}
-                  showCollapseLink={this.showCollapseLink}
                   comments={this.props.comments}
                   submitComment={this.props.submitComment}
                 />