Use eslint

.eslintrc

@@ -0,0 +1,6 @@
+{
+  "extends": "vue",
+  "rules": {
+    "no-duplicate-imports": 0
+  }
+}

package.json

@@ -16,6 +16,7 @@
   "bugs": "https://github.com/pespantelis/vue-typeahead/issues",
   "homepage": "http://pespantelis.github.io/vue-typeahead/",
   "scripts": {
+    "lint": "eslint src demo",
     "dev": "webpack-dev-server --content-base demo/ --inline --hot",
     "build": "cross-env NODE_ENV=production webpack --progress --hide-modules",
     "dist": "rollup src/main.js -o dist/vue-typeahead.js -f cjs"
@@ -33,6 +34,8 @@
     "babel-preset-stage-2": "^6.0.0",
     "cross-env": "^1.0.6",
     "css-loader": "^0.23.0",
+    "eslint": "^2.13.1",
+    "eslint-config-vue": "^1.0.3",
     "vue-hot-reload-api": "^1.2.0",
     "vue-html-loader": "^1.0.0",
     "vue-loader": "^8.3.0",

src/main.js

@@ -1,4 +1,4 @@
-import {util} from 'vue'
+import { util } from 'vue'
 
 export default {
   data () {
@@ -57,15 +57,14 @@ export default {
         return util.warn('You need to set the `src` property', this)
       }
 
-      if (this.queryParamName == null) {
+      if (this.queryParamName === null) {
         return this.$http.get(this.src + this.query)
       } else {
-        let queryParam = {
+        const queryParam = {
           [this.queryParamName]: this.query
         }
         return this.$http.get(this.src, Object.assign(queryParam, this.data))
       }
-
     },
 
     reset () {
@@ -80,7 +79,7 @@ export default {
 
     activeClass (index) {
       return {
-        active: this.current == index
+        active: this.current === index
       }
     },
 
@@ -93,7 +92,7 @@ export default {
     up () {
       if (this.current > 0) {
         this.current--
-      } else if (this.current == -1) {
+      } else if (this.current === -1) {
         this.current = this.items.length - 1
       } else {
         this.current = -1