Example library is added. Need to test

Author: WrathChaos

.eslintrc.js

@@ -1,6 +1,13 @@
 module.exports = {
+  root: true,
+  extends: [
+    "@react-native-community",
+    "airbnb-typescript",
+    "prettier",
+    "prettier/@typescript-eslint",
+    "prettier/react"
+  ],
   parser: "babel-eslint",
-  extends: "airbnb",
   plugins: ["react", "react-native"],
   env: {
     jest: true,
@@ -11,7 +18,7 @@ module.exports = {
     "react/jsx-filename-extension": [
       "error",
       {
-        extensions: [".js", ".jsx"]
+        extensions: [".js", ".jsx", ".tsx", ".ts"]
       }
     ],
     // for post defining style object in react-native

lib/FunctionalComponent/index.tsx

@@ -0,0 +1,86 @@
+import React from "react";
+import { Button, StyleSheet, Text, View } from "react-native";
+
+export interface Props {
+  name: string;
+  enthusiasmLevel?: number;
+}
+
+interface State {
+  enthusiasmLevel: number;
+}
+
+export class Hello extends React.Component<Props, State> {
+  constructor(props: Props) {
+    super(props);
+
+    if ((props.enthusiasmLevel || 0) <= 0) {
+      throw new Error("You could be a little more enthusiastic. :D");
+    }
+
+    this.state = {
+      enthusiasmLevel: props.enthusiasmLevel || 1
+    };
+  }
+
+  onIncrement = () =>
+    this.setState({ enthusiasmLevel: this.state.enthusiasmLevel + 1 });
+  onDecrement = () =>
+    this.setState({ enthusiasmLevel: this.state.enthusiasmLevel - 1 });
+  getExclamationMarks = (numChars: number) => Array(numChars + 1).join("!");
+
+  render() {
+    return (
+      <View style={styles.root}>
+        <Text style={styles.greeting}>
+          Hello{" "}
+          {this.props.name +
+            this.getExclamationMarks(this.state.enthusiasmLevel)}
+        </Text>
+
+        <View style={styles.buttons}>
+          <View style={styles.button}>
+            <Button
+              title="-"
+              onPress={this.onDecrement}
+              accessibilityLabel="decrement"
+              color="red"
+            />
+          </View>
+
+          <View style={styles.button}>
+            <Button
+              title="+"
+              onPress={this.onIncrement}
+              accessibilityLabel="increment"
+              color="blue"
+            />
+          </View>
+        </View>
+      </View>
+    );
+  }
+}
+
+// styles
+const styles = StyleSheet.create({
+  root: {
+    alignItems: "center",
+    alignSelf: "center"
+  },
+  buttons: {
+    flexDirection: "row",
+    minHeight: 70,
+    alignItems: "stretch",
+    alignSelf: "center",
+    borderWidth: 5
+  },
+  button: {
+    flex: 1,
+    paddingVertical: 0
+  },
+  greeting: {
+    color: "#999",
+    fontWeight: "bold"
+  }
+});

lib/StatefulComponent/Size.ts

@@ -0,0 +1,7 @@
+export default {
+  S: 11,
+  M: 14,
+  L: 16,
+  XL: 22,
+  XXL: 28
+};

lib/StatefulComponent/Text.tsx

@@ -0,0 +1,40 @@
+import React from "react";
+import { Text as RNText, TextStyle } from "react-native";
+import Size from "./Size";
+
+export interface TextProps {
+  size?: "S" | "M" | "L" | "XL" | "XXL"; // size name
+  style?: TextStyle;
+  bold?: boolean;
+  color?: string;
+  children: React.ReactNode;
+}
+
+const getSize: { [key: string]: number } = Size;
+
+const checkSize = (size: string): number => {
+  return getSize[size] || 0;
+};
+
+const Text = ({
+  size = "M",
+  children,
+  style,
+  bold,
+  color,
+  ...rest
+}: TextProps) => (
+  <RNText
+    {...rest}
+    style={{
+      ...style,
+      fontSize: checkSize(size),
+      fontWeight: bold ? "700" : "400",
+      color: color || "black"
+    }}
+  >
+    {children}
+  </RNText>
+);
+
+export default Text;

package.json

@@ -22,5 +22,11 @@
   "peerDependencies": {
     "react": ">= 16.x.x",
     "react-native": ">= 0.55.x"
+  },
+  "devDependencies": {
+    "@types/react": "^16.9.17",
+    "@types/react-native": "^0.60.28",
+    "react-native-typescript-transformer": "^1.2.13",
+    "typescript": "^3.7.4"
   }
 }

rn-cli.config.js

@@ -0,0 +1,8 @@
+module.exports = {
+  getTransformModulePath() {
+    return require.resolve("react-native-typescript-transformer");
+  },
+  getSourceExts() {
+    return ["ts", "tsx"];
+  }
+};

tsconfig.json

@@ -0,0 +1,78 @@
+{
+  "compilerOptions": {
+    /* Basic Options */
+    // "incremental": true,                   /* Enable incremental compilation */
+    "target": "es6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' 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. */,
+    "allowSyntheticDefaultImports": true,
+    // "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. */
+    // "declarationMap": true,                /* Generates a sourcemap for each 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. */
+    // "composite": true,                     /* Enable project compilation */
+    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
+    // "removeComments": true,                /* Do not emit comments to output. */
+    "noEmit": true /* Do not emit outputs. */,
+    // "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": false /* 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. */
+    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "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. */
+    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */
+
+    /* 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. */
+
+    "noResolve": false,
+    /* Advanced Options */
+    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
+  },
+  "exclude": [
+    "node_modules",
+    "babel.config.js",
+    "metro.config.js",
+    "jest.config.js",
+    "__tests__/**/*-test.ts"
+  ]
+}