diff --git a/src/common/helpers/create-api-component.js b/src/common/helpers/create-api-component.js
index fbf303cf292e94b9f1dd908b54d0da5520c9c78e..678a49385696b98796890a8dd13d27b553c741b1 100644
--- a/src/common/helpers/create-api-component.js
+++ b/src/common/helpers/create-api-component.js
@@ -9,11 +9,17 @@ export default function createAPIComponent(Vue, Component, events = [], single =
     before(fn) {
       beforeFns.push(fn)
     },
-    open(data, renderFn, instanceSingle) {
-      if (typeof renderFn !== 'function') {
-        instanceSingle = renderFn
+    open(data, renderFn, options) {
+      if (typeof renderFn !== 'function' && options === undefined) {
+        options = renderFn
         renderFn = null
       }
+      let instanceSingle = options
+      if (typeof options === 'object') {
+        instanceSingle = !!options.single
+        delete options.single
+      }
+
       beforeFns.forEach((before) => {
         before(data, renderFn, instanceSingle)
       })
@@ -26,7 +32,7 @@ export default function createAPIComponent(Vue, Component, events = [], single =
         // singleComponent.show && singleComponent.show()
         return singleComponent
       }
-      const component = instantiateComponent(Vue, Component, data, renderFn)
+      const component = instantiateComponent(Vue, Component, data, renderFn, options)
       const instance = component.$parent
       const originRemove = component.remove
 
@@ -61,13 +67,27 @@ export default function createAPIComponent(Vue, Component, events = [], single =
     },
     create(config, renderFn, single) {
       const ownerInstance = this
+      const isInVueInstance = !!ownerInstance.$on
       const renderData = parseRenderData(config, events)
 
       cancelWatchProps()
       processProps()
       processEvents()
 
-      const component = api.open(renderData, renderFn, single)
+      if (typeof renderFn !== 'function' && single === undefined) {
+        single = !!renderFn
+        renderFn = null
+      }
+      // to get Vue options
+      // store router i18n ...
+      const options = {
+        single: single
+      }
+      if (isInVueInstance) {
+        options.parent = ownerInstance
+      }
+
+      const component = api.open(renderData, renderFn, options)
       if (component.__cube__parent !== ownerInstance) {
         component.__cube__parent = ownerInstance
         const beforeDestroy = function () {
@@ -78,7 +98,7 @@ export default function createAPIComponent(Vue, Component, events = [], single =
           ownerInstance.$off('hook:beforeDestroy', beforeDestroy)
           component.__cube__parent = null
         }
-        ownerInstance.$on && ownerInstance.$on('hook:beforeDestroy', beforeDestroy)
+        isInVueInstance && ownerInstance.$on('hook:beforeDestroy', beforeDestroy)
       }
       return component
 
@@ -100,7 +120,7 @@ export default function createAPIComponent(Vue, Component, events = [], single =
               renderData.props[key] = propKey
             }
           })
-          if (ownerInstance.$watch) {
+          if (isInVueInstance) {
             ownerInstance.__createAPI_watcher = ownerInstance.$watch(function () {
               const props = {}
               watchKeys.forEach((key, i) => {
diff --git a/src/common/helpers/dom.js b/src/common/helpers/dom.js
index 351669f6d4c6823614cc78671c76a70a6ff24918..f97cb83522738256a7bca6a0af622b29b160da1c 100644
--- a/src/common/helpers/dom.js
+++ b/src/common/helpers/dom.js
@@ -65,6 +65,7 @@ let vendor = (() => {
 })()
 
 export function prefixStyle(style) {
+  /* istanbul ignore if */
   if (vendor === false) {
     return false
   }
diff --git a/src/common/helpers/instantiate-component.js b/src/common/helpers/instantiate-component.js
index 04db2c2062cf7797d5c06dee0774e2d972a21c13..2297fd2e44dae05894be51d068e370621ff60b3d 100644
--- a/src/common/helpers/instantiate-component.js
+++ b/src/common/helpers/instantiate-component.js
@@ -1,7 +1,13 @@
-export default function instantiateComponent(Vue, Component, data, renderFn) {
+export default function instantiateComponent(Vue, Component, data, renderFn, options) {
   let renderData
   let childrenRenderFn
+
+  if (options === undefined) {
+    options = {}
+  }
+
   const instance = new Vue({
+    ...options,
     render(createElement) {
       let children = childrenRenderFn && childrenRenderFn(createElement)
       if (children && !Array.isArray(children)) {
diff --git a/src/common/helpers/raf.js b/src/common/helpers/raf.js
index 79970409d8a716848de49000dd023c4744c05d68..2de23478909348f3d0763a8834ca1f0e245f7a21 100644
--- a/src/common/helpers/raf.js
+++ b/src/common/helpers/raf.js
@@ -11,10 +11,14 @@ export const requestAnimationFrame = (() => {
     return noop
   }
   return window.requestAnimationFrame ||
+    /* istanbul ignore next */
     window.webkitRequestAnimationFrame ||
+    /* istanbul ignore next */
     window.mozRequestAnimationFrame ||
+    /* istanbul ignore next */
     window.oRequestAnimationFrame ||
     // if all else fails, use setTimeout
+    /* istanbul ignore next */
     function (callback) {
       return window.setTimeout(callback, (callback.interval || DEFAULT_INTERVAL) / 2) // make interval as precise as possible.
     }
@@ -26,9 +30,13 @@ export const cancelAnimationFrame = (() => {
     return noop
   }
   return window.cancelAnimationFrame ||
+    /* istanbul ignore next */
     window.webkitCancelAnimationFrame ||
+    /* istanbul ignore next */
     window.mozCancelAnimationFrame ||
+    /* istanbul ignore next */
     window.oCancelAnimationFrame ||
+    /* istanbul ignore next */
     function (id) {
       window.clearTimeout(id)
     }
diff --git a/src/common/helpers/util.js b/src/common/helpers/util.js
index 319e562315179ec3f02a453eadf270cb1fc1f723..f15d3d897e1f31565a747451bd087c9556d1d048 100644
--- a/src/common/helpers/util.js
+++ b/src/common/helpers/util.js
@@ -2,7 +2,9 @@ function findIndex(ary, fn) {
   if (ary.findIndex) {
     return ary.findIndex(fn)
   }
+  /* istanbul ignore next */
   let index = -1
+  /* istanbul ignore next */
   ary.some(function (item, i, ary) {
     const ret = fn.call(this, item, i, ary)
     if (ret) {
@@ -10,6 +12,7 @@ function findIndex(ary, fn) {
       return ret
     }
   })
+  /* istanbul ignore next */
   return index
 }
 
diff --git a/src/components/input/input.vue b/src/components/input/input.vue
index 1093e7e40f3c20c42864674bd1a5532b51194087..71bba0fd90f8962dce97bb867a00c486ae60a4ac 100644
--- a/src/components/input/input.vue
+++ b/src/components/input/input.vue
@@ -179,6 +179,7 @@
       border-color: $input-focus-border-color
   .cube-input-prepend, .cube-input-append
     display: flex
+    align-items: center
   .cube-input-prepend
     + .cube-input-field
       margin-left: -5px