chore: apply prettier (#115)

* completed eslint ts setup and fixed eslint issues

* minor change in direction 😄

* upgraded type definitions

* declared custom global variable

* moved global var definition below imports

README.md

@@ -25,23 +25,23 @@
 
 ## :arrow_forward: Usage
 
-> `react-native@0.61.0` or higher
+### Note on the legacy CLI
+There seems to be quite some confusion about the legacy CLI. This template only works with the new CLI. Make sure you have uninstalled the legacy `react-native-cli` first (`npm uninstall -g react-native-cli`), for the below command to work. If you wish to not use `npx`, you can also install the new CLI globally (`npm i -g @react-native-community/cli` or `yarn global add @react-native-community/cli`).
+
+Further information can be found here: https://github.com/react-native-community/cli#about
+
+### `react-native@0.61.0` or higher
 
 ```sh
 npx react-native init MyApp --template react-native-template-typescript
 ```
 
-> `react-native@0.60.x`
+### `react-native@0.60.x`
 
 ```sh
 npx react-native init MyApp --template react-native-template-typescript@6.2.0
 ```
 
-### Note on the legacy CLI
-There seems to be quite some confusion about the legacy CLI. This template only works with the new CLI. Make sure you have uninstalled the legacy `react-native-cli` first (`npm uninstall -g react-native-cli`), for the above command to work. If you wish to not use `npx`, you can also install the new CLI globally (`npm i -g @react-native-community/cli` or `yarn global add @react-native-community/cli`).
-
-Further information can be found here: https://github.com/react-native-community/cli#about
-
 ## :computer: Contributing
 
 Contributions are very welcome. Please check out the [contributing document](CONTRIBUTING.md).

template/App.tsx

@@ -26,8 +26,9 @@ import {
   ReloadInstructions,
 } from 'react-native/Libraries/NewAppScreen';
 
+declare var global: {HermesInternal: null | {}};
+
 const App = () => {
-  const usingHermes = typeof HermesInternal === 'object' && HermesInternal !== null;
   return (
     <>
       <StatusBar barStyle="dark-content" />
@@ -36,7 +37,7 @@ const App = () => {
           contentInsetAdjustmentBehavior="automatic"
           style={styles.scrollView}>
           <Header />
-          {!usingHermes ? null : (
+          {global.HermesInternal == null ? null : (
             <View style={styles.engine}>
               <Text style={styles.footer}>Engine: Hermes</Text>
             </View>
@@ -45,8 +46,8 @@ const App = () => {
             <View style={styles.sectionContainer}>
               <Text style={styles.sectionTitle}>Step One</Text>
               <Text style={styles.sectionDescription}>
-                Edit <Text style={styles.highlight}>App.tsx</Text> to change this
-                screen and then come back to see your edits.
+                Edit <Text style={styles.highlight}>App.tsx</Text> to change
+                this screen and then come back to see your edits.
               </Text>
             </View>
             <View style={styles.sectionContainer}>

template/_eslintrc.js

@@ -1,4 +1,6 @@
 module.exports = {
   root: true,
   extends: '@react-native-community',
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint'],
 };

template/package.json

@@ -6,25 +6,28 @@
     "android": "react-native run-android",
     "ios": "react-native run-ios",
     "start": "react-native start",
-    "test": "jest"
+    "test": "jest",
+    "lint": "eslint . --ext .js,.jsx,.ts,.tsx"
   },
   "dependencies": {
     "react": "16.9.0",
-    "react-native": "0.61.2"
+    "react-native": "0.61.5"
   },
   "devDependencies": {
     "@babel/core": "^7.6.2",
     "@babel/runtime": "^7.6.2",
     "@react-native-community/eslint-config": "^0.0.5",
-    "@types/jest": "^24.0.18",
-    "@types/react": "16.9.0",
-    "@types/react-native": "^0.60.17",
-    "@types/react-test-renderer": "16.9.0",
+    "@types/jest": "^24.0.24",
+    "@types/react-native": "^0.60.25",
+    "@types/react-test-renderer": "16.9.1",
+    "@typescript-eslint/eslint-plugin": "^2.12.0",
+    "@typescript-eslint/parser": "^2.12.0",
     "babel-jest": "^24.9.0",
+    "eslint": "^6.5.1",
     "jest": "^24.9.0",
     "metro-react-native-babel-preset": "^0.56.0",
     "react-test-renderer": "16.9.0",
-    "typescript": "^3.6.3"
+    "typescript": "^3.7.3"
   },
   "jest": {
     "preset": "react-native",

template/tsconfig.json

@@ -15,6 +15,7 @@
     // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
     // "removeComments": true,                /* Do not emit comments to output. */
     "noEmit": true,                           /* Do not emit outputs. */
+    "incremental": true,                      /* Enable incremental compilation */
     // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
     // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
     "isolatedModules": true,                  /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
@@ -58,4 +59,4 @@
   "exclude": [
     "node_modules", "babel.config.js", "metro.config.js", "jest.config.js"
   ]
-}
+}