diff --git a/src/frontend/js/app.ts b/src/frontend/js/app.ts
index dbc77a4..f154d61 100644
--- a/src/frontend/js/app.ts
+++ b/src/frontend/js/app.ts
@@ -4,222 +4,33 @@ import api from './api'
 import template from './templates/index.html' with {type: 'text'}
 import icons from './icons'
 import { setupKeybindings } from './key'
+import { scrollto, debounce, dateRepr } from './utils'
+import drag from './components/drag'
+import dropdown from './components/dropdown'
+import modal from './components/modal'
+import relativeTime from './components/relative-time'
+import icon from './components/icon'
+import scrollDir from './directives/scroll'
+import focusDir from './directives/focus'
 
 var app = window.app
 var vm
 
 var TITLE = document.title
 
-function scrollto(target, scroll) {
-  var padding = 10
-  var targetRect = target.getBoundingClientRect()
-  var scrollRect = scroll.getBoundingClientRect()
-
-  // target
-  var relativeOffset = targetRect.y - scrollRect.y
-  var absoluteOffset = relativeOffset + scroll.scrollTop
-
-  if (padding <= relativeOffset && relativeOffset + targetRect.height <= scrollRect.height - padding) return
-
-  var newPos = scroll.scrollTop
-  if (relativeOffset < padding) {
-    newPos = absoluteOffset - padding
-  } else {
-    newPos = absoluteOffset - scrollRect.height + targetRect.height + padding
-  }
-  scroll.scrollTop = Math.round(newPos)
-}
-
-var debounce = function(callback, wait) {
-  var timeout
-  return function() {
-    var ctx = this, args = arguments
-    clearTimeout(timeout)
-    timeout = setTimeout(function() {
-      callback.apply(ctx, args)
-    }, wait)
-  }
-}
-
-Vue.directive('scroll', {
-  inserted: function(el, binding) {
-    el.addEventListener('scroll', debounce(function(event) {
-      binding.value(event, el)
-    }, 200))
-  },
-})
-
-Vue.directive('focus', {
-  inserted: function(el) {
-    el.focus()
-  }
-})
-
-Vue.component('drag', {
-  props: ['width'],
-  template: '<div class="drag"></div>',
-  mounted: function() {
-    var self = this
-    var startX = undefined
-    var initW = undefined
-    var onMouseMove = function(e) {
-      var offset = e.clientX - startX
-      var newWidth = initW + offset
-      self.$emit('resize', newWidth)
-    }
-    var onMouseUp = function(e) {
-      document.removeEventListener('mousemove', onMouseMove)
-      document.removeEventListener('mouseup', onMouseUp)
-    }
-    this.$el.addEventListener('mousedown', function(e) {
-      startX = e.clientX
-      initW = self.width
-      document.addEventListener('mousemove', onMouseMove)
-      document.addEventListener('mouseup', onMouseUp)
-    })
-  },
-})
-
-Vue.component('dropdown', {
-  props: ['toggle-class', 'drop', 'title'],
-  data: function() {
-    return {open: false}
-  },
-  template: `
-    <div class="dropdown" :class="$attrs.class">
-      <button ref="btn" @click="toggle" :class="btnToggleClass" :title="$props.title"><slot name="button"></slot></button>
-      <div ref="menu" class="dropdown-menu" :class="{show: open}"><slot v-if="open"></slot></div>
-    </div>
-  `,
-  computed: {
-    btnToggleClass: function() {
-      var c = this.$props.toggleClass || ''
-      c += ' dropdown-toggle dropdown-toggle-no-caret'
-      c += this.open ? ' show' : ''
-      return c.trim()
-    }
-  },
-  methods: {
-    toggle: function(e) {
-      this.open ? this.hide() : this.show()
-    },
-    show: function(e) {
-      this.open = true
-      this.$refs.menu.style.top = this.$refs.btn.offsetHeight + 'px'
-      var drop = this.$props.drop
-
-      if (drop === 'right') {
-        this.$refs.menu.style.left = 'auto'
-        this.$refs.menu.style.right = '0'
-      } else if (drop === 'center') {
-        this.$nextTick(function() {
-          var btnWidth = this.$refs.btn.getBoundingClientRect().width
-          var menuWidth = this.$refs.menu.getBoundingClientRect().width
-          this.$refs.menu.style.left = '-' + ((menuWidth - btnWidth) / 2) + 'px'
-        }.bind(this))
-      }
-
-      document.addEventListener('click', this.clickHandler)
-    },
-    hide: function() {
-      this.open = false
-      document.removeEventListener('click', this.clickHandler)
-    },
-    clickHandler: function(e) {
-      var dropdown = e.target.closest('.dropdown')
-      if (dropdown == null || dropdown != this.$el) return this.hide()
-      if (e.target.closest('.dropdown-item') != null) return this.hide()
-    }
-  },
-})
-
-Vue.component('modal', {
-  props: ['open'],
-  template: `
-    <div class="modal custom-modal" tabindex="-1" v-if="$props.open">
-      <div class="modal-dialog">
-        <div class="modal-content" ref="content">
-          <div class="modal-body">
-            <slot v-if="$props.open"></slot>
-          </div>
-        </div>
-      </div>
-    </div>
-  `,
-  data: function() {
-    return {opening: false}
-  },
-  watch: {
-    'open': function(newVal) {
-      if (newVal) {
-        this.opening = true
-        document.addEventListener('click', this.handleClick)
-      } else {
-        document.removeEventListener('click', this.handleClick)
-      }
-    },
-  },
-  methods: {
-    handleClick: function(e) {
-      if (this.opening) {
-        this.opening = false
-        return
-      }
-      if (e.target.closest('.modal-content') == null) this.$emit('hide')
-    },
-  },
-})
-
-function dateRepr(d) {
-  var sec = (new Date().getTime() - d.getTime()) / 1000
-  var neg = sec < 0
-  var out = ''
-
-  sec = Math.abs(sec)
-  if (sec < 2700)  // less than 45 minutes
-    out = Math.round(sec / 60) + 'm'
-  else if (sec < 86400)  // less than 24 hours
-    out = Math.round(sec / 3600) + 'h'
-  else if (sec < 604800)  // less than a week
-    out = Math.round(sec / 86400) + 'd'
-  else
-    out = d.toLocaleDateString(undefined, {year: "numeric", month: "long", day: "numeric"})
-
-  if (neg) return '-' + out
-  return out
-}
-
-Vue.component('relative-time', {
-  props: ['val'],
-  data: function() {
-    var d = new Date(this.val)
-    return {
-      'date': d,
-      'formatted': dateRepr(d),
-      'interval': null,
-    }
-  },
-  template: '<time :datetime="val">{{ formatted }}</time>',
-  mounted: function() {
-    this.interval = setInterval(function() {
-      this.formatted = dateRepr(this.date)
-    }.bind(this), 600000)  // every 10 minutes
-  },
-  destroyed: function() {
-    clearInterval(this.interval)
-  },
-})
-
-Vue.component('v-icon', {
-  props: ['name'],
-  template: '<span class="icon" v-html="content"></span>',
-  computed: {
-    content: function () { return icons[this.name] || '' }
-  }
-})
-
 export default {
   template: template,
+  components: {
+    'v-drag': drag,
+    'v-dropdown': dropdown,
+    'v-modal': modal,
+    'v-relative-time': relativeTime,
+    'v-icon': icon,
+  },
+  directives: {
+    scroll: scrollDir,
+    focus: focusDir,
+  },
   created: function() {
     vm = this
     this.refreshStats()
diff --git a/src/frontend/js/components/drag.ts b/src/frontend/js/components/drag.ts
new file mode 100644
index 0000000..2da6095
--- /dev/null
+++ b/src/frontend/js/components/drag.ts
@@ -0,0 +1,24 @@
+export default {
+  props: ['width'],
+  template: '<div class="drag"></div>',
+  mounted: function() {
+    var self = this
+    var startX = undefined
+    var initW = undefined
+    var onMouseMove = function(e) {
+      var offset = e.clientX - startX
+      var newWidth = initW + offset
+      self.$emit('resize', newWidth)
+    }
+    var onMouseUp = function(e) {
+      document.removeEventListener('mousemove', onMouseMove)
+      document.removeEventListener('mouseup', onMouseUp)
+    }
+    this.$el.addEventListener('mousedown', function(e) {
+      startX = e.clientX
+      initW = self.width
+      document.addEventListener('mousemove', onMouseMove)
+      document.addEventListener('mouseup', onMouseUp)
+    })
+  },
+}
diff --git a/src/frontend/js/components/dropdown.ts b/src/frontend/js/components/dropdown.ts
new file mode 100644
index 0000000..c20a5e3
--- /dev/null
+++ b/src/frontend/js/components/dropdown.ts
@@ -0,0 +1,52 @@
+export default {
+  props: ['toggle-class', 'drop', 'title'],
+  data: function() {
+    return {open: false}
+  },
+  template: `
+    <div class="dropdown" :class="$attrs.class">
+      <button ref="btn" @click="toggle" :class="btnToggleClass" :title="$props.title"><slot name="button"></slot></button>
+      <div ref="menu" class="dropdown-menu" :class="{show: open}"><slot v-if="open"></slot></div>
+    </div>
+  `,
+  computed: {
+    btnToggleClass: function() {
+      var c = this.$props.toggleClass || ''
+      c += ' dropdown-toggle dropdown-toggle-no-caret'
+      c += this.open ? ' show' : ''
+      return c.trim()
+    }
+  },
+  methods: {
+    toggle: function(e) {
+      this.open ? this.hide() : this.show()
+    },
+    show: function(e) {
+      this.open = true
+      this.$refs.menu.style.top = this.$refs.btn.offsetHeight + 'px'
+      var drop = this.$props.drop
+
+      if (drop === 'right') {
+        this.$refs.menu.style.left = 'auto'
+        this.$refs.menu.style.right = '0'
+      } else if (drop === 'center') {
+        this.$nextTick(function() {
+          var btnWidth = this.$refs.btn.getBoundingClientRect().width
+          var menuWidth = this.$refs.menu.getBoundingClientRect().width
+          this.$refs.menu.style.left = '-' + ((menuWidth - btnWidth) / 2) + 'px'
+        }.bind(this))
+      }
+
+      document.addEventListener('click', this.clickHandler)
+    },
+    hide: function() {
+      this.open = false
+      document.removeEventListener('click', this.clickHandler)
+    },
+    clickHandler: function(e) {
+      var dropdown = e.target.closest('.dropdown')
+      if (dropdown == null || dropdown != this.$el) return this.hide()
+      if (e.target.closest('.dropdown-item') != null) return this.hide()
+    }
+  },
+}
diff --git a/src/frontend/js/components/icon.ts b/src/frontend/js/components/icon.ts
new file mode 100644
index 0000000..3dd86c3
--- /dev/null
+++ b/src/frontend/js/components/icon.ts
@@ -0,0 +1,9 @@
+import icons from '../icons'
+
+export default {
+  props: ['name'],
+  template: '<span class="icon" v-html="content"></span>',
+  computed: {
+    content: function () { return icons[this.name] || '' }
+  }
+}
diff --git a/src/frontend/js/components/modal.ts b/src/frontend/js/components/modal.ts
new file mode 100644
index 0000000..e5ec6d1
--- /dev/null
+++ b/src/frontend/js/components/modal.ts
@@ -0,0 +1,36 @@
+export default {
+  props: ['open'],
+  template: `
+    <div class="modal custom-modal" tabindex="-1" v-if="$props.open">
+      <div class="modal-dialog">
+        <div class="modal-content" ref="content">
+          <div class="modal-body">
+            <slot v-if="$props.open"></slot>
+          </div>
+        </div>
+      </div>
+    </div>
+  `,
+  data: function() {
+    return {opening: false}
+  },
+  watch: {
+    'open': function(newVal) {
+      if (newVal) {
+        this.opening = true
+        document.addEventListener('click', this.handleClick)
+      } else {
+        document.removeEventListener('click', this.handleClick)
+      }
+    },
+  },
+  methods: {
+    handleClick: function(e) {
+      if (this.opening) {
+        this.opening = false
+        return
+      }
+      if (e.target.closest('.modal-content') == null) this.$emit('hide')
+    },
+  },
+}
diff --git a/src/frontend/js/components/relative-time.ts b/src/frontend/js/components/relative-time.ts
new file mode 100644
index 0000000..176e1ec
--- /dev/null
+++ b/src/frontend/js/components/relative-time.ts
@@ -0,0 +1,22 @@
+import { dateRepr } from '../utils'
+
+export default {
+  props: ['val'],
+  data: function() {
+    var d = new Date(this.val)
+    return {
+      'date': d,
+      'formatted': dateRepr(d),
+      'interval': null,
+    }
+  },
+  template: '<time :datetime="val">{{ formatted }}</time>',
+  mounted: function() {
+    this.interval = setInterval(function() {
+      this.formatted = dateRepr(this.date)
+    }.bind(this), 600000)  // every 10 minutes
+  },
+  destroyed: function() {
+    clearInterval(this.interval)
+  },
+}
diff --git a/src/frontend/js/directives/focus.ts b/src/frontend/js/directives/focus.ts
new file mode 100644
index 0000000..2208314
--- /dev/null
+++ b/src/frontend/js/directives/focus.ts
@@ -0,0 +1,5 @@
+export default {
+  inserted: function(el) {
+    el.focus()
+  }
+}
diff --git a/src/frontend/js/directives/scroll.ts b/src/frontend/js/directives/scroll.ts
new file mode 100644
index 0000000..963fe66
--- /dev/null
+++ b/src/frontend/js/directives/scroll.ts
@@ -0,0 +1,9 @@
+import { debounce } from '../utils'
+
+export default {
+  inserted: function(el, binding) {
+    el.addEventListener('scroll', debounce(function(event) {
+      binding.value(event, el)
+    }, 200))
+  },
+}
diff --git a/src/frontend/js/templates/index.html b/src/frontend/js/templates/index.html
index a70b358..e63d2c5 100644
--- a/src/frontend/js/templates/index.html
+++ b/src/frontend/js/templates/index.html
@@ -1,7 +1,7 @@
 <div class="d-flex" :class="{'feed-selected': feedSelected !== null, 'item-selected': itemSelected !== null}">
     <!-- feed list -->
     <div id="col-feed-list" class="vh-100 position-relative d-flex flex-column border-right flex-shrink-0" :style="{width: feedListWidth+'px'}">
-        <drag :width="feedListWidth" @resize="resizeFeedList"></drag>
+        <v-drag :width="feedListWidth" @resize="resizeFeedList"></v-drag>
         <div class="p-2 toolbar d-flex align-items-center">
             <v-icon class="mx-2" name="anchor" />
             <div class="flex-grow-1"></div>
@@ -27,7 +27,7 @@
                 <v-icon name="assorted" />
             </button>
             <div class="flex-grow-1"></div>
-            <dropdown class="settings-dropdown" toggle-class="btn btn-link toolbar-item px-2" ref="menuDropdown" drop="right" :title="$t('settings')">
+            <v-dropdown class="settings-dropdown" toggle-class="btn btn-link toolbar-item px-2" ref="menuDropdown" drop="right" :title="$t('settings')">
                 <template v-slot:button>
                     <v-icon name="more-horizontal" />
                 </template>
@@ -122,7 +122,7 @@
                     <v-icon class="mr-1" name="log-out" />
                     {{ $t('log_out') }}
                 </button>
-            </dropdown>
+            </v-dropdown>
         </div>
         <div id="feed-list-scroll" class="p-2 overflow-auto scroll-touch border-top flex-grow-1">
             <label class="selectgroup">
@@ -174,7 +174,7 @@
     </div>
     <!-- item list -->
     <div id="col-item-list" class="vh-100 position-relative d-flex flex-column border-right flex-shrink-0" :style="{width: itemListWidth+'px'}">
-        <drag :width="itemListWidth" @resize="resizeItemList"></drag>
+        <v-drag :width="itemListWidth" @resize="resizeItemList"></v-drag>
         <div class="px-2 toolbar d-flex align-items-center">
             <button class="toolbar-item mr-2 d-block d-md-none"
                     @click="feedSelected = null"
@@ -197,7 +197,7 @@
             <button class="btn btn-link toolbar-item px-2 ml-2" v-if="!current.type" disabled>
                 <v-icon name="more-horizontal" />
             </button>
-            <dropdown class="settings-dropdown"
+            <v-dropdown class="settings-dropdown"
                         toggle-class="btn btn-link toolbar-item px-2 ml-2"
                         drop="right"
                         :title="$t('feed_settings')"
@@ -245,8 +245,8 @@
                     <v-icon class="mr-1" name="trash" />
                     {{ $t('delete') }}
                 </button>
-            </dropdown>
-            <dropdown class="settings-dropdown"
+            </v-dropdown>
+            <v-dropdown class="settings-dropdown"
                         toggle-class="btn btn-link toolbar-item px-2 ml-2"
                         :title="$t('folder_settings')"
                         drop="right"
@@ -264,7 +264,7 @@
                     <v-icon class="mr-1" name="trash" />
                     {{ $t('delete') }}
                 </button>
-            </dropdown>
+            </v-dropdown>
         </div>
         <div id="item-list-scroll" class="p-2 overflow-auto scroll-touch border-top flex-grow-1" v-scroll="loadMoreItems" ref="itemlist">
             <label v-for="item in items" :key="item.id"
@@ -279,7 +279,7 @@
                         <small class="flex-fill text-truncate mr-1">
                             {{ (feedsById[item.feed_id] || {}).title }}
                         </small>
-                        <small class="flex-shrink-0"><relative-time v-bind:title="formatDate(item.date)" :val="item.date"/></small>
+                        <small class="flex-shrink-0"><v-relative-time v-bind:title="formatDate(item.date)" :val="item.date"/></small>
                     </div>
                     <div>{{ item.title || $t('untitled') }}</div>
                 </div>
@@ -305,7 +305,7 @@
                 <v-icon name="circle-full" v-if="itemSelectedDetails.status=='unread'" />
                 <v-icon name="circle" v-if="itemSelectedDetails.status!='unread'" />
             </button>
-            <dropdown class="settings-dropdown" toggle-class="toolbar-item px-2" drop="center" :title="$t('appearance')">
+            <v-dropdown class="settings-dropdown" toggle-class="toolbar-item px-2" drop="center" :title="$t('appearance')">
                 <template v-slot:button>
                     <v-icon name="sliders" />
                 </template>
@@ -318,7 +318,7 @@
                     <button class="dropdown-item" style="font-size: 0.8rem" @click.stop="incrFont(-1)">A</button>
                     <button class="dropdown-item" style="font-size: 1.2rem" @click.stop="incrFont(1)">A</button>
                 </div>
-            </dropdown>
+            </v-dropdown>
             <button class="toolbar-item"
                     :class="{active: itemSelectedReadability}"
                     @click="toggleReadability()"
@@ -369,7 +369,7 @@
             </div>
         </div>
     </div>
-    <modal :open="!!settings" @hide="settings = ''">
+    <v-modal :open="!!settings" @hide="settings = ''">
         <button class="btn btn-link outline-none float-right p-2 mr-n2 mt-n2" style="line-height: 1" @click="settings = ''">
             <v-icon name="x" />
         </button>
@@ -425,5 +425,5 @@
                 </tr>
             </table>
         </div>
-    </modal>
+    </v-modal>
 </div>
diff --git a/src/frontend/js/utils.ts b/src/frontend/js/utils.ts
new file mode 100644
index 0000000..835ccf9
--- /dev/null
+++ b/src/frontend/js/utils.ts
@@ -0,0 +1,49 @@
+export function scrollto(target, scroll) {
+  var padding = 10
+  var targetRect = target.getBoundingClientRect()
+  var scrollRect = scroll.getBoundingClientRect()
+
+  // target
+  var relativeOffset = targetRect.y - scrollRect.y
+  var absoluteOffset = relativeOffset + scroll.scrollTop
+
+  if (padding <= relativeOffset && relativeOffset + targetRect.height <= scrollRect.height - padding) return
+
+  var newPos = scroll.scrollTop
+  if (relativeOffset < padding) {
+    newPos = absoluteOffset - padding
+  } else {
+    newPos = absoluteOffset - scrollRect.height + targetRect.height + padding
+  }
+  scroll.scrollTop = Math.round(newPos)
+}
+
+export function debounce(callback, wait) {
+  var timeout
+  return function() {
+    var ctx = this, args = arguments
+    clearTimeout(timeout)
+    timeout = setTimeout(function() {
+      callback.apply(ctx, args)
+    }, wait)
+  }
+}
+
+export function dateRepr(d) {
+  var sec = (new Date().getTime() - d.getTime()) / 1000
+  var neg = sec < 0
+  var out = ''
+
+  sec = Math.abs(sec)
+  if (sec < 2700)  // less than 45 minutes
+    out = Math.round(sec / 60) + 'm'
+  else if (sec < 86400)  // less than 24 hours
+    out = Math.round(sec / 3600) + 'h'
+  else if (sec < 604800)  // less than a week
+    out = Math.round(sec / 86400) + 'd'
+  else
+    out = d.toLocaleDateString(undefined, {year: "numeric", month: "long", day: "numeric"})
+
+  if (neg) return '-' + out
+  return out
+}