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": "16.8.1",
-    "react-native": "0.61.1"
+    "react": "16.9.0",
+    "react-native": "0.61.5"
   },
   "devDependencies": {
-    "@babel/core": "^7.5.0",
-    "@babel/runtime": "^7.5.0",
-    "@react-native-community/eslint-config": "^0.0.3",
-    "@types/jest": "^24.0.18",
-    "@types/react": "16.8.19",
-    "@types/react-native": "0.60.15",
-    "@types/react-test-renderer": "16.8.1",
-    "babel-jest": "^24.1.0",
-    "jest": "^24.1.0",
-    "metro-react-native-babel-preset": "^0.51.1",
-    "react-test-renderer": "16.8.1",
-    "typescript": "^3.6.3"
+    "@babel/core": "^7.6.2",
+    "@babel/runtime": "^7.6.2",
+    "@react-native-community/eslint-config": "^0.0.5",
+    "@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": "^3.7.3"
   },
   "jest": {
     "preset": "react-native",

template/tsconfig.json

@@ -0,0 +1,62 @@
+ 
+{
+  "compilerOptions": {
+    /* Basic Options */
+    "target": "esnext",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    "lib": ["es6"],                           /* Specify library files to be included in the compilation. */
+    "allowJs": true,                          /* Allow javascript files to be compiled. */
+    // "checkJs": true,                       /* Report errors in .js files. */
+    "jsx": "react-native",                    /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
+    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
+    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
+    // "outFile": "./",                       /* Concatenate and emit output to single file. */
+    // "outDir": "./",                        /* Redirect output structure to the directory. */
+    // "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'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,              /* Enable strict null checks. */
+    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
+    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+
+    /* Module Resolution Options */
+    "moduleResolution": "node",               /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    "baseUrl": "./",                          /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                       /* List of folders to include type definitions from. */
+    // "types": [],                           /* Type declaration files to be included in compilation. */
+    "allowSyntheticDefaultImports": true,     /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
+
+    /* Source Map Options */
+    // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "./",                       /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+  },
+  "exclude": [
+    "node_modules", "babel.config.js", "metro.config.js", "jest.config.js"
+  ]
+}