First pass at Hoverable component

app/soapbox/components/status_action_bar.js

@@ -19,7 +19,7 @@ import SoapboxPropTypes from 'soapbox/utils/soapbox_prop_types';
 
 import { openModal } from '../actions/modals';
 
-import { IconButton, Text } from './ui';
+import { IconButton, Text, Hoverable } from './ui';
 
 
 const messages = defineMessages({
@@ -547,7 +547,6 @@ class StatusActionBar extends ImmutablePureComponent {
 
   render() {
     const { status, intl, allowedEmoji, emojiSelectorFocused, handleEmojiSelectorUnfocus, features, me } = this.props;
-    const { emojiSelectorVisible } = this.state;
 
     const publicStatus = ['public', 'unlisted'].includes(status.get('visibility'));
 
@@ -664,18 +663,17 @@ class StatusActionBar extends ImmutablePureComponent {
           {reblogCount !== 0 && <Text size='xs' theme='muted' role='presentation' onClick={this.handleOpenReblogsModal}>{reblogCount}</Text>}
         </div>
 
-        <div
+        <Hoverable
           ref={this.setRef}
           className='flex relative items-center space-x-0.5 p-1 rounded-full focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500'
-          onMouseEnter={this.handleLikeButtonHover}
+          component={(
-          onMouseLeave={this.handleLikeButtonLeave}
+            <EmojiSelector
+              onReact={this.handleReact}
+              focused={emojiSelectorFocused}
+              onUnfocus={handleEmojiSelectorUnfocus}
+            />
+          )}
         >
-          <EmojiSelector
-            onReact={this.handleReact}
-            visible={features.emojiReacts && emojiSelectorVisible}
-            focused={emojiSelectorFocused}
-            onUnfocus={handleEmojiSelectorUnfocus}
-          />
           <IconButton
             className={classNames({
               'text-gray-400 hover:text-gray-600 dark:hover:text-white': !meEmojiReact,
@@ -698,7 +696,7 @@ class StatusActionBar extends ImmutablePureComponent {
               <span className='detailed-status__link'>{emojiReactCount}</span>
             )
           )}
-        </div>
+        </Hoverable>
 
         {shareButton}
 

app/soapbox/components/ui/hoverable/hoverable.tsx

@@ -0,0 +1,49 @@
+import Portal from '@reach/portal';
+import React, { useState, useRef } from 'react';
+
+interface IHoverable {
+  component: React.Component,
+}
+
+/** Wrapper to render a given component when hovered */
+const Hoverable: React.FC<IHoverable> = ({
+  component,
+  children,
+}): JSX.Element => {
+
+  const [portalActive, setPortalActive] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  const handleMouseEnter = () => {
+    setPortalActive(true);
+  };
+
+  const handleMouseLeave = () => {
+    setPortalActive(false);
+  };
+
+  const setPortalPosition = (): React.CSSProperties => {
+    if (!ref.current) return {};
+
+    const { top, height, left, width } = ref.current.getBoundingClientRect();
+
+    return {
+      top: top + height,
+      left,
+      width,
+    };
+  };
+
+  return (
+    <div
+      onMouseEnter={handleMouseEnter}
+      onMouseLeave={handleMouseLeave}
+      ref={ref}
+    >
+      {children}
+      {portalActive && <Portal><div className='fixed' style={setPortalPosition()}>{component}</div></Portal>}
+    </div>
+  );
+};
+
+export default Hoverable;

app/soapbox/components/ui/index.ts

@@ -7,6 +7,7 @@ export { default as EmojiSelector } from './emoji-selector/emoji-selector';
 export { default as Form } from './form/form';
 export { default as FormActions } from './form-actions/form-actions';
 export { default as FormGroup } from './form-group/form-group';
+export { default as Hoverable } from './hoverable/hoverable';
 export { default as HStack } from './hstack/hstack';
 export { default as Icon } from './icon/icon';
 export { default as IconButton } from './icon-button/icon-button';