feat: START_LOCATION change to import (#62)

Author: LiuXing-R

transformations/__testfixtures__/vue-router-v4/create-router.input.js

@@ -24,4 +24,10 @@ new VueRouter({
   fallback: false
 });
 
+router.beforeEach((to,from, next) => {
+  if(from === VueRouter.START_LOCATION){
+    next('/motomo');
+  }
+});
+
 export default router;

transformations/__testfixtures__/vue-router-v4/create-router.output.js

@@ -1,4 +1,4 @@
-import { createRouter, createWebHashHistory } from 'vue-router';
+import { createRouter, createWebHashHistory, START_LOCATION } from 'vue-router';
 import Home from '../views/Home.vue';
 
 const routes = [
@@ -24,4 +24,10 @@ createRouter({
   routes
 });
 
+router.beforeEach((to,from, next) => {
+  if(from === START_LOCATION){
+    next('/motomo');
+  }
+});
+
 export default router;

transformations/vue-router-v4.ts

@@ -91,6 +91,30 @@ export const transformAST: ASTTransformation = context => {
 
       return j.callExpression(j.identifier('createRouter'), node.arguments)
     })
+
+    // VueRouter.START_LOCATION => import {START_LOCATION} from 'vue-router'
+    const startLocationMember = root.find(j.MemberExpression, {
+      object: {
+        type: 'Identifier',
+        name: localVueRouter
+      },
+      property: {
+        type: 'Identifier',
+        name: 'START_LOCATION'
+      }
+    })
+
+    if (startLocationMember.length) {
+      addImport(context, {
+        specifier: { type: 'named', imported: 'START_LOCATION' },
+        source: 'vue-router'
+      })
+
+      startLocationMember.replaceWith(({ node }) => {
+        return node.property
+      })
+    }
+
     removeExtraneousImport(context, {
       localBinding: localVueRouter
     })