Fixed more issues reported by vue-migration-helper

src/components/Select.vue

@@ -174,7 +174,7 @@
 	<div class="dropdown v-select" :class="dropdownClasses">
 		<div ref="toggle" @mousedown.prevent="toggleDropdown" class="dropdown-toggle clearfix" type="button">
 
-        <span class="selected-tag" v-for="(option, index) in valueAsArray" track-by="index">
+        <span class="selected-tag" v-for="option in valueAsArray" v-bind:key="index">
           {{ getOptionLabel(option) }}
           <button v-if="multiple" @click="select(option)" type="button" class="close">
             <span aria-hidden="true">&times;</span>
@@ -207,7 +207,7 @@
 		</div>
 
 		<ul ref="dropdown-menu" v-show="open" :transition="transition" class="dropdown-menu" :style="{ 'max-height': maxHeight }">
-			<li v-for="(option, index) in filteredOptions" track-by="index" :class="{ active: isOptionSelected(option), highlight: index === typeAheadPointer }" @mouseover="typeAheadPointer = index">
+			<li v-for="(option, index) in filteredOptions" v-bind:key="index" :class="{ active: isOptionSelected(option), highlight: index === typeAheadPointer }" @mouseover="typeAheadPointer = index">
 				<a @mousedown.prevent="select(option)">
 					{{ getOptionLabel(option) }}
 				</a>

src/dev.js

@@ -3,7 +3,6 @@ import vSelect from '../src/components/Select.vue'
 
 Vue.component('v-select', vSelect)
 
-Vue.config.debug = true
 Vue.config.devtools = true
 
 /* eslint-disable no-new */

src/mixins/pointerScroll.js

@@ -31,7 +31,7 @@ module.exports = {
     pixelsToPointerTop() {
       let pixelsToPointerTop = 0
       for (let i = 0; i < this.typeAheadPointer; i++) {
-        pixelsToPointerTop += this.$els.dropdownMenu.children[i].offsetHeight
+        pixelsToPointerTop += this.$refs.dropdownMenu.children[i].offsetHeight
       }
       return pixelsToPointerTop
     },
@@ -50,7 +50,7 @@ module.exports = {
      * @returns {number}
      */
     pointerHeight() {
-      let element = this.$els.dropdownMenu.children[this.typeAheadPointer]
+      let element = this.$refs.dropdownMenu.children[this.typeAheadPointer]
       return element ? element.offsetHeight : 0
     },
 
@@ -60,8 +60,8 @@ module.exports = {
      */
     viewport() {
       return {
-        top: this.$els.dropdownMenu.scrollTop,
-        bottom: this.$els.dropdownMenu.offsetHeight + this.$els.dropdownMenu.scrollTop
+        top: this.$refs.dropdownMenu.scrollTop,
+        bottom: this.$refs.dropdownMenu.offsetHeight + this.$refs.dropdownMenu.scrollTop
       }
     },
 
@@ -71,7 +71,7 @@ module.exports = {
      * @returns {*}
      */
     scrollTo(position) {
-      return this.$els.dropdownMenu.scrollTop = position
+      return this.$refs.dropdownMenu.scrollTop = position
     },
   }
 }