fix: default route resolution + docs

Author: rigor789

Diff for: README.md

@@ -80,3 +80,19 @@ export default {
   }
 }
 ```
+
+## Navigating
+
+This package provides 2 methods for navigation, `$navigator.navigate` and `$navigator.back`
+
+`$navigator.navigate(to, options)` is used for all forward navigation
+ * `to` is the path to navigate to (ex.: `/home`)
+ * `options` is an optional object, which accepts all options supported  by [Manual Routing](https://nativescript-vue.org/en/docs/routing/manual-routing/#navigateto)
+ 
+For example, given you are on a Login page, and successfully log in you would navigate to the Home page with
+```js
+this.$navigator.navigate('/home', { clearHistory: true })
+```
+Note that we used `clearHistory: true` to prevent the back button from going back to the login page.
+
+`$navigator.back(options, backstackEntry)` is an alias to [`$navigateBack`](https://nativescript-vue.org/en/docs/routing/manual-routing/#navigatebackoptions-backstackentry--null)

Diff for: components/Navigator.js

@@ -38,7 +38,7 @@ export default {
           _currentEntry = value
           if (value && value.resolvedPage) {
             self.$navigator._updatePath(
-              value.resolvedPage.__path || value.resolvedPage.path || ''
+              value.resolvedPage.__path || self.defaultRoute || ''
             )
           }
         },

Diff for: index.js

@@ -18,15 +18,18 @@ export default function install(Vue, {routes}) {
 
   Vue.prototype.$navigator = new Vue({
     data: {
-      path: '',
+      path: false,
+      defaultPath: '/'
     },
     computed: {
       route() {
-        return routes[this.path]
+        return routes[this.path || this.defaultPath]
       },
     },
     methods: {
-      _resolveComponent() {
+      _resolveComponent(defaultPath) {
+        if(defaultPath) this.defaultPath = defaultPath
+
         if (this.route) {
           return this.route.component
         }
@@ -47,6 +50,9 @@ export default function install(Vue, {routes}) {
         }
 
         this.$navigateTo(matchedRoute.component, options)
+      },
+      back(...args) {
+        this.$navigateBack.call(this, args)
       }
     },
   })