Add toggle for timestamps

ui/component/livestreamComments/view.jsx

@@ -1,4 +1,5 @@
 // @flow
+import { Menu, MenuButton, MenuList, MenuItem } from '@reach/menu-button';
 import React from 'react';
 import classnames from 'classnames';
 import Spinner from 'component/spinner';
@@ -10,6 +11,7 @@ import CreditAmount from 'component/common/credit-amount';
 import ChannelThumbnail from 'component/channelThumbnail';
 import Tooltip from 'component/common/tooltip';
 import * as ICONS from 'constants/icons';
+import Icon from 'component/common/icon';
 import OptimizedImage from 'component/optimizedImage';
 import { parseSticker } from 'util/comments';
 
@@ -26,6 +28,14 @@ type Props = {
   doResolveUris: (Array<string>, boolean) => void,
 };
 
+const IS_TIMESTAMP_VISIBLE = () =>
+  // $FlowFixMe
+  document.documentElement.style.getPropertyValue('--live-timestamp-opacity') === '0.5';
+
+const TOGGLE_TIMESTAMP_OPACITY = () =>
+  // $FlowFixMe
+  document.documentElement.style.setProperty('--live-timestamp-opacity', IS_TIMESTAMP_VISIBLE() ? '0' : '0.5');
+
 const VIEW_MODES = {
   CHAT: 'chat',
   SUPERCHAT: 'sc',
@@ -54,6 +64,7 @@ export default function LivestreamComments(props: Props) {
   const [scrollPos, setScrollPos] = React.useState(0);
   const [showPinned, setShowPinned] = React.useState(true);
   const [resolvingSuperChat, setResolvingSuperChat] = React.useState(false);
+
   const claimId = claim && claim.claim_id;
   const commentsLength = commentsByChronologicalOrder && commentsByChronologicalOrder.length;
 
@@ -190,7 +201,25 @@ export default function LivestreamComments(props: Props) {
   return (
     <div className="card livestream__discussion">
       <div className="card__header--between livestream-discussion__header">
-        <div className="livestream-discussion__title">{__('Live discussion')}</div>
+        <div className="livestream-discussion__title">
+          {__('Live discussion')}
+
+          <Menu>
+            <MenuButton className="menu__button">
+              <Icon size={18} icon={ICONS.MORE_VERTICAL} />
+            </MenuButton>
+
+            <MenuList className="menu__list">
+              <MenuItem className="comment__menu-option" onSelect={TOGGLE_TIMESTAMP_OPACITY}>
+                <span className="menu__link">
+                  <Icon aria-hidden icon={ICONS.TIME} />
+                  {__('Toggle Timestamps')}
+                </span>
+              </MenuItem>
+            </MenuList>
+          </Menu>
+        </div>
+
         {hasSuperChats && (
           <div className="recommended-content__toggles">
             {/* the superchats in chronological order button */}

ui/scss/component/_livestream.scss

@@ -64,6 +64,7 @@ $recent-msg-button__height: 2rem;
 .livestream-discussion__title {
   @extend .card__title-section;
   @extend .card__title-section--small;
+  display: flex;
   padding: 0;
 }
 
@@ -89,12 +90,12 @@ $recent-msg-button__height: 2rem;
 
   .date_time {
     color: var(--color-text-subtitle);
-    opacity: 0.5;
+    opacity: var(--live-timestamp-opacity);
   }
 
-  &:not(:hover) {
+  &:hover {
-    .date_time:not(:focus) {
+    .date_time {
-      display: none;
+      opacity: 0.5;
     }
   }
 

ui/scss/init/_vars.scss

@@ -96,6 +96,7 @@
   --tag-height: 1.5rem;
 
   --livestream-comments-width: 30rem;
+  --live-timestamp-opacity: 0;
 
   // Animations
   --resizing-animation-function: ease-in;