Improve ESLint rules for JSX (#3608)

* Add react/no-string-refs ESLint rule

* Add react/jsx-boolean-value ESLint rule

* Add react/jsx-closing-bracket-location ESLint rule

* Add react/jsx-indent ESLint rule

* Add react/jsx-curly-spacing ESLint rule

* Add react/jsx-equals-spacing ESLint rule

* Add react/jsx-first-prop-new-line ESLint rule

* Add react/jsx-no-duplicate-props ESLint rule

* Add react/jsx-tag-spacing ESLint rule

.eslintrc.yml

@@ -64,9 +64,24 @@ rules:
   strict: off
   valid-typeof: error
 
+  react/jsx-boolean-value: error
+  react/jsx-closing-bracket-location:
+  - error
+  - line-aligned
+  react/jsx-curly-spacing: error
+  react/jsx-equals-spacing: error
+  react/jsx-first-prop-new-line:
+  - error
+  - multiline-multiprop
+  react/jsx-indent:
+  - error
+  - 2
   react/jsx-no-bind: error
+  react/jsx-no-duplicate-props: error
+  react/jsx-tag-spacing: error
   react/jsx-wrap-multilines: error
   react/no-multi-comp: off
+  react/no-string-refs: error
   react/prop-types: error
   react/self-closing-comp: error
 

app/javascript/mastodon/components/account.js

@@ -55,11 +55,11 @@ class Account extends ImmutablePureComponent {
       const muting  = account.getIn(['relationship', 'muting']);
 
       if (requested) {
-        buttons = <IconButton disabled={true} icon='hourglass' title={intl.formatMessage(messages.requested)} />;
+        buttons = <IconButton disabled icon='hourglass' title={intl.formatMessage(messages.requested)} />;
       } else if (blocking) {
-        buttons = <IconButton active={true} icon='unlock-alt' title={intl.formatMessage(messages.unblock, { name: account.get('username') })} onClick={this.handleBlock} />;
+        buttons = <IconButton active icon='unlock-alt' title={intl.formatMessage(messages.unblock, { name: account.get('username') })} onClick={this.handleBlock} />;
       } else if (muting) {
-        buttons = <IconButton active={true} icon='volume-up' title={intl.formatMessage(messages.unmute, { name: account.get('username') })} onClick={this.handleMute} />;
+        buttons = <IconButton active icon='volume-up' title={intl.formatMessage(messages.unmute, { name: account.get('username') })} onClick={this.handleMute} />;
       } else {
         buttons = <IconButton icon={following ? 'user-times' : 'user-plus'} title={intl.formatMessage(following ? messages.unfollow : messages.follow)} onClick={this.handleFollow} active={following} />;
       }

app/javascript/mastodon/components/autosuggest_textarea.js

@@ -191,7 +191,8 @@ class AutosuggestTextarea extends ImmutablePureComponent {
               key={suggestion}
               data-index={suggestion}
               className={`autosuggest-textarea__suggestions__item ${i === selectedSuggestion ? 'selected' : ''}`}
-              onClick={this.onSuggestionClick}>
+              onClick={this.onSuggestionClick}
+            >
               <AutosuggestAccountContainer id={suggestion} />
             </div>
           ))}

app/javascript/mastodon/components/dropdown_menu.js

@@ -53,13 +53,13 @@ class DropdownMenu extends React.PureComponent {
 
   renderItem = (item, i) => {
     if (item === null) {
-      return <li key={ 'sep' + i } className='dropdown__sep' />;
+      return <li key={`sep-${i}`} className='dropdown__sep' />;
     }
 
     const { text, action, href = '#' } = item;
 
     return (
-      <li className='dropdown__content-list-item' key={ text + i }>
+      <li className='dropdown__content-list-item' key={`${text}-${i}`}>
         <a href={href} target='_blank' rel='noopener' onClick={this.handleClick} data-index={i} className='dropdown__content-list-link'>
           {text}
         </a>
@@ -81,7 +81,7 @@ class DropdownMenu extends React.PureComponent {
     return (
       <Dropdown ref={this.setRef} onShow={this.handleShow} onHide={this.handleHide}>
         <DropdownTrigger className='icon-button' style={{ fontSize: `${size}px`, width: `${size}px`, lineHeight: `${size}px` }} aria-label={ariaLabel}>
-          <i className={ `fa fa-fw fa-${icon} dropdown__icon` }  aria-hidden={true} />
+          <i className={`fa fa-fw fa-${icon} dropdown__icon`}  aria-hidden />
         </DropdownTrigger>
 
         <DropdownContent className={directionClass}>

app/javascript/mastodon/components/icon_button.js

@@ -76,7 +76,8 @@ class IconButton extends React.PureComponent {
             title={this.props.title}
             className={classes.join(' ')}
             onClick={this.handleClick}
-            style={style}>
+            style={style}
+          >
             <i style={{ transform: `rotate(${rotate}deg)` }} className={`fa fa-fw fa-${this.props.icon}`} aria-hidden='true' />
           </button>
         }

app/javascript/mastodon/components/media_gallery.js

@@ -105,8 +105,8 @@ class Item extends React.PureComponent {
             src={attachment.get('url')}
             onClick={this.handleClick}
             autoPlay={autoPlay}
-            loop={true}
+            loop
-            muted={true}
+            muted
           />
 
           <span className='media-gallery__gifv__label'>GIF</span>

app/javascript/mastodon/components/status.js

@@ -168,7 +168,7 @@ class Status extends ImmutablePureComponent {
             <FormattedMessage id='status.reblogged_by' defaultMessage='{name} boosted' values={{ name: <a onClick={this.handleAccountClick} data-id={status.getIn(['account', 'id'])} href={status.getIn(['account', 'url'])} className='status__display-name muted'><strong dangerouslySetInnerHTML={displayNameHTML} /></a> }} />
           </div>
 
-          <Status {...other} wrapped={true} status={status.get('reblog')} account={status.get('account')} />
+          <Status {...other} wrapped status={status.get('reblog')} account={status.get('account')} />
         </div>
       );
     }

app/javascript/mastodon/components/status_action_bar.js

@@ -139,7 +139,7 @@ class StatusActionBar extends ImmutablePureComponent {
       <div className='status__action-bar'>
         <IconButton className='status__action-bar-button' title={replyTitle} icon={replyIcon} onClick={this.handleReplyClick} />
         <IconButton className='status__action-bar-button' disabled={reblogDisabled} active={status.get('reblogged')} title={reblogDisabled ? intl.formatMessage(messages.cannot_reblog) : intl.formatMessage(messages.reblog)} icon={reblogIcon} onClick={this.handleReblogClick} />
-        <IconButton className='status__action-bar-button star-icon' animate={true} active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} />
+        <IconButton className='status__action-bar-button star-icon' animate active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} />
 
         <div className='status__action-bar-dropdown'>
           <DropdownMenu items={menu} icon='ellipsis-h' size={18} direction='right' ariaLabel='More' />

app/javascript/mastodon/components/video_player.js

@@ -184,7 +184,7 @@ class VideoPlayer extends React.PureComponent {
           ref={this.setRef}
           src={media.get('url')}
           autoPlay={!isIOS()}
-          loop={true}
+          loop
           muted={this.state.muted}
           onClick={this.handleVideoClick}
         />

app/javascript/mastodon/features/account/components/header.js

@@ -104,7 +104,7 @@ class Header extends ImmutablePureComponent {
       if (account.getIn(['relationship', 'requested'])) {
         actionBtn = (
           <div className='account--action-button'>
-            <IconButton size={26} disabled={true} icon='hourglass' title={intl.formatMessage(messages.requested)} />
+            <IconButton size={26} disabled icon='hourglass' title={intl.formatMessage(messages.requested)} />
           </div>
         );
       } else if (!account.getIn(['relationship', 'blocking'])) {

app/javascript/mastodon/features/account_gallery/components/media_item.js

@@ -28,7 +28,8 @@ class MediaItem extends ImmutablePureComponent {
         <Permalink
           to={`/statuses/${status.get('id')}`}
           href={status.get('url')}
-          style={style}>
+          style={style}
+        >
           {content}
         </Permalink>
       </div>

app/javascript/mastodon/features/compose/components/emoji_picker_dropdown.js

@@ -106,14 +106,16 @@ class EmojiPickerDropdown extends React.PureComponent {
     return (
       <Dropdown ref={this.setRef} className='emoji-picker__dropdown' onShow={this.onShowDropdown} onHide={this.onHideDropdown}>
         <DropdownTrigger className='emoji-button' title={intl.formatMessage(messages.emoji)}>
-          <img draggable='false'
+          <img
+            draggable='false'
             className={`emojione ${active && loading ? 'pulse-loading' : ''}`}
-               alt='🙂' src='/emoji/1f602.svg' />
+            alt='🙂' src='/emoji/1f602.svg'
+          />
         </DropdownTrigger>
         <DropdownContent className='dropdown__left'>
           {
             this.state.active && !this.state.loading &&
-            (<EmojiPicker emojione={settings} onChange={this.handleChange} searchPlaceholder={intl.formatMessage(messages.emoji_search)} categories={categories} search={true} />)
+            (<EmojiPicker emojione={settings} onChange={this.handleChange} searchPlaceholder={intl.formatMessage(messages.emoji_search)} categories={categories} search />)
           }
         </DropdownContent>
       </Dropdown>

app/javascript/mastodon/features/getting_started/index.js

@@ -77,7 +77,7 @@ class GettingStarted extends ImmutablePureComponent {
     ]);
 
     return (
-      <Column icon='asterisk' heading={intl.formatMessage(messages.heading)} hideHeadingOnMobile={true}>
+      <Column icon='asterisk' heading={intl.formatMessage(messages.heading)} hideHeadingOnMobile>
         <div className='getting-started__wrapper'>
           <ColumnSubheading text={intl.formatMessage(messages.navigation_subheading)} />
           {navItems}

app/javascript/mastodon/features/hashtag_timeline/index.js

@@ -117,7 +117,7 @@ class HashtagTimeline extends React.PureComponent {
           onClick={this.handleHeaderClick}
           pinned={pinned}
           multiColumn={multiColumn}
-          showBackButton={true}
+          showBackButton
         />
 
         <StatusListContainer

app/javascript/mastodon/features/notifications/components/notification.js

@@ -45,7 +45,7 @@ class Notification extends ImmutablePureComponent {
           <FormattedMessage id='notification.favourite' defaultMessage='{name} favourited your status' values={{ name: link }} />
         </div>
 
-        <StatusContainer id={notification.get('status')} account={notification.get('account')} muted={true} withDismiss />
+        <StatusContainer id={notification.get('status')} account={notification.get('account')} muted withDismiss />
       </div>
     );
   }
@@ -60,7 +60,7 @@ class Notification extends ImmutablePureComponent {
           <FormattedMessage id='notification.reblog' defaultMessage='{name} boosted your status' values={{ name: link }} />
         </div>
 
-        <StatusContainer id={notification.get('status')} account={notification.get('account')} muted={true} withDismiss />
+        <StatusContainer id={notification.get('status')} account={notification.get('account')} muted withDismiss />
       </div>
     );
   }

app/javascript/mastodon/features/status/components/action_bar.js

@@ -81,7 +81,7 @@ class ActionBar extends React.PureComponent {
       <div className='detailed-status__action-bar'>
         <div className='detailed-status__button'><IconButton title={intl.formatMessage(messages.reply)} icon={status.get('in_reply_to_id', null) === null ? 'reply' : 'reply-all'} onClick={this.handleReplyClick} /></div>
         <div className='detailed-status__button'><IconButton disabled={reblog_disabled} active={status.get('reblogged')} title={reblog_disabled ? intl.formatMessage(messages.cannot_reblog) : intl.formatMessage(messages.reblog)} icon={reblogIcon} onClick={this.handleReblogClick} /></div>
-        <div className='detailed-status__button'><IconButton animate={true} active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} activeStyle={{ color: '#ca8f04' }} /></div>
+        <div className='detailed-status__button'><IconButton animate active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} activeStyle={{ color: '#ca8f04' }} /></div>
 
         <div className='detailed-status__action-bar-dropdown'>
           <DropdownMenu size={18} icon='ellipsis-h' items={menu} direction='left' ariaLabel='More' />

app/javascript/mastodon/features/ui/components/column.js

@@ -50,7 +50,8 @@ class Column extends React.PureComponent {
         role='region'
         aria-labelledby={columnHeaderId}
         className='column'
-        onScroll={this.handleScroll}>
+        onScroll={this.handleScroll}
+      >
         {header}
         {children}
       </div>

app/javascript/mastodon/features/ui/components/media_modal.js

@@ -75,7 +75,7 @@ class MediaModal extends ImmutablePureComponent {
     if (attachment.get('type') === 'image') {
       content = <ImageLoader src={url} />;
     } else if (attachment.get('type') === 'gifv') {
-      content = <ExtendedVideoPlayer src={url} muted={true} controls={false} />;
+      content = <ExtendedVideoPlayer src={url} muted controls={false} />;
     }
 
     return (

app/javascript/mastodon/features/ui/components/modal_root.js

@@ -64,7 +64,8 @@ class ModalRoot extends React.PureComponent {
       <TransitionMotion
         styles={items}
         willEnter={this.willEnter}
-        willLeave={this.willLeave}>
+        willLeave={this.willLeave}
+      >
         {interpolatedStyles =>
           <div className='modal-root'>
             {interpolatedStyles.map(({ key, data: { type, props }, style }) => {

app/javascript/mastodon/features/ui/components/video_modal.js

@@ -29,7 +29,7 @@ class VideoModal extends ImmutablePureComponent {
       <div className='modal-root__modal media-modal'>
         <div>
           <div className='media-modal__close'><IconButton title={intl.formatMessage(messages.close)} icon='times' overlay onClick={onClose} /></div>
-          <ExtendedVideoPlayer src={url} muted={false} controls={true} time={time} />
+          <ExtendedVideoPlayer src={url} muted={false} controls time={time} />
         </div>
       </div>
     );