Drop optional-chaining use, change to module type

.github/workflows/node.js.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Get node
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: 14.x
     - run: npm i -g yarn

index.js

@@ -4,7 +4,7 @@ export const mount = (component, { props, children, element, app } = {}) => {
   let el = element
 
   let vNode = createVNode(component, props, children)
-  if (app?._context) vNode.appContext = app._context
+  if (app && app._context) vNode.appContext = app._context
   if (el) render(vNode, el)
   else if (typeof document !== 'undefined' ) render(vNode, el = document.createElement('div'))
 

package.json

@@ -2,14 +2,15 @@
   "name": "mount-vue-component",
   "version": "0.9.5",
   "description": "a tiny utility to programatically create and mount Vue 3 components - e.g. a Vue.extend replacement",
+  "type": "module",
   "main": "dist/index.cjs.js",
   "module": "dist/index.esm.js",
   "scripts": {
     "build": "rollup -c",
     "preversion": "npm run build",
     "version": "npm publish --access public",
     "postversion": "git push --follow-tags",
-    "test": "node -r esm-with-syntax-fixes -r browser-env/register test/mount.test.js"
+    "test": "node test/mount.test.js"
   },
   "repository": {
     "type": "git",
@@ -28,11 +29,10 @@
   },
   "homepage": "https://github.com/pearofducks/mount-vue-component#readme",
   "devDependencies": {
-    "browser-env": "^3.3.0",
-    "esm": "^3.2.25",
-    "esm-with-syntax-fixes": "^0.0.1",
-    "rollup": "^2.27.1",
-    "uvu": "^0.3.3",
-    "vue": "^3.0.0"
+    "abdomen": "^1.0.0",
+    "jsdom": "^16.5.3",
+    "rollup": "^2.48.0",
+    "uvu": "^0.5.1",
+    "vue": "^3.0.11"
   }
 }

test/mount.test.js

@@ -1,7 +1,8 @@
+import 'abdomen/setup'
 import { test } from 'uvu'
 import * as assert from 'uvu/assert'
 import { isVNode, h, createApp } from 'vue'
-import { mount as createComponentInstance } from '../index'
+import { mount as createComponentInstance } from '../index.js'
 
 const createComponent = (options) => ({
   template: '<h1 class="my-class">Hello {{ name }}<slot /></h1>',