feat: typescript typings (#78)

package.json

@@ -9,8 +9,10 @@
     "Ricardo Gobbo de Souza <ricardogobbosouza@yahoo.com.br>"
   ],
   "main": "lib/module.js",
+  "types": "types/index.d.ts",
   "files": [
-    "lib"
+    "lib",
+    "types/*.d.ts"
   ],
   "scripts": {
     "lint": "eslint --ext .js,.vue .",

types/index.d.ts

@@ -0,0 +1,33 @@
+import type Vue from 'vue'
+import type { default as VueAnalytics, InstallOptions } from 'vue-analytics'
+import './vuex'
+
+declare module '@nuxt/vue-app' {
+  interface Context {
+    $ga: VueAnalytics
+  }
+  interface NuxtAppOptions {
+    $ga: VueAnalytics
+  }
+}
+
+// Nuxt 2.9+
+declare module '@nuxt/types' {
+  interface Context {
+    $ga: VueAnalytics
+  }
+
+  interface NuxtAppOptions {
+    $ga: VueAnalytics
+  }
+
+  interface Configuration {
+    googleAnalytics?: InstallOptions
+  }
+}
+
+declare module 'vue/types/vue' {
+  interface Vue {
+    $ga: VueAnalytics
+  }
+}

types/vuex.d.ts

@@ -0,0 +1,7 @@
+import type VueAnalytics from 'vue-analytics'
+
+declare module 'vuex' {
+  interface Store<S> {
+    $ga: VueAnalytics,
+  }
+}