Material Community Icons are undefined

jrodmora · January 12, 2022, 11:44am

Hi guys

I’ve been having this problem for a really long time now. I’m really hoping someone has overcome this issue.

We already have an app that is being developed, but we have decided to build micro-frontends to strip out some features into separate modules. The existing app does not have this problem.

I’ve created a react native module, with an example app within it to test it. The code is mostly copied over from the existing app mentioned above, with some changes here and there. The module uses react-native-paper.

The example app runs fine on both ios and android, until I add icons.

Once I add an icon from react-native-paper, from any component, I start getting this error:

I get the same error on Android.

I’ve tried loading the fonts within the component, but I just cannot seem to over come this issue.

This is the error I get in the terminal:

Error: Requiring unknown module "undefined". If you are sure the module exists, try restarting Metro. You may also want to run `yarn` or `npm install`.
Error: Requiring unknown module "undefined". If you are sure the module exists, try restarting Metro. You may also want to run `yarn` or `npm install`.
TypeError: undefined is not an object (evaluating '_$$_REQUIRE(_dependencyMap[6], "react/jsx-runtime").jsx')

This error is located at:
    in Icon
    in ThemedComponent (created by withTheme(Icon))
    in withTheme(Icon) (created by IconButton)
    in RCTView (created by View)
    in View (created by IconButton)
    in RCTView (created by View)
    in View (created by TouchableHighlight)
    in TouchableHighlight
    in Unknown (created by TouchableRipple)
    in TouchableRipple
    in ThemedComponent (created by withTheme(TouchableRipple))
    in withTheme(TouchableRipple) (created by IconButton)
    in IconButton
    in ThemedComponent (created by withTheme(IconButton))
    in withTheme(IconButton) (created by TextInput.Icon)
    in RCTView (created by View)
    in View (created by TextInput.Icon)
    in TextInput.Icon (created by Logic)
    in IconAdornment (created by TextInputAdornment)
    in TextInputAdornment (created by TextInputOutlined)
    in RCTView (created by View)
    in View (created by TextInputOutlined)
    in RCTView (created by View)
    in View (created by TextInputOutlined)
    in TextInputOutlined (created by TextInput)
    in TextInput
    in ThemedComponent (created by withTheme(TextInput))
    in withTheme(TextInput) (created by InputAutocomplete)
    in RCTView (created by View)
    in View (created by InputAutocomplete)
    in RCTView (created by View)
    in View (created by TouchableHighlight)
    in TouchableHighlight
    in Unknown (created by TouchableRipple)
    in TouchableRipple
    in ThemedComponent (created by withTheme(TouchableRipple))
    in withTheme(TouchableRipple) (created by InputAutocomplete)
    in InputAutocomplete (created by Logic)
    in Logic (created by FormBuilder)
    in FormBuilder (created by App)
    in RCTScrollContentView (created by ScrollView)
    in RCTScrollView (created by ScrollView)
    in ScrollView (created by ScrollView)
    in ScrollView (created by App)
    in RCTView (created by View)
    in View (created by App)
    in App (created by ExpoRoot)
    in ExpoRoot
    in RCTView (created by View)
    in View (created by AppContainer)
    in RCTView (created by View)
    in View (created by AppContainer)
    in AppContainer
TypeError: undefined is not an object (evaluating '_$$_REQUIRE(_dependencyMap[6], "react/jsx-runtime").jsx')

This error is located at:
    in Icon
    in ThemedComponent (created by withTheme(Icon))
    in withTheme(Icon) (created by IconButton)
    in RCTView (created by View)
    in View (created by IconButton)
    in RCTView (created by View)
    in View (created by TouchableHighlight)
    in TouchableHighlight
    in Unknown (created by TouchableRipple)
    in TouchableRipple
    in ThemedComponent (created by withTheme(TouchableRipple))
    in withTheme(TouchableRipple) (created by IconButton)
    in IconButton
    in ThemedComponent (created by withTheme(IconButton))
    in withTheme(IconButton) (created by TextInput.Icon)
    in RCTView (created by View)
    in View (created by TextInput.Icon)
    in TextInput.Icon (created by Logic)
    in IconAdornment (created by TextInputAdornment)
    in TextInputAdornment (created by TextInputOutlined)
    in RCTView (created by View)
    in View (created by TextInputOutlined)
    in RCTView (created by View)
    in View (created by TextInputOutlined)
    in TextInputOutlined (created by TextInput)
    in TextInput
    in ThemedComponent (created by withTheme(TextInput))
    in withTheme(TextInput) (created by InputAutocomplete)
    in RCTView (created by View)
    in View (created by InputAutocomplete)
    in RCTView (created by View)
    in View (created by TouchableHighlight)
    in TouchableHighlight
    in Unknown (created by TouchableRipple)
    in TouchableRipple
    in ThemedComponent (created by withTheme(TouchableRipple))
    in withTheme(TouchableRipple) (created by InputAutocomplete)
    in InputAutocomplete (created by Logic)
    in Logic (created by FormBuilder)
    in FormBuilder (created by App)
    in RCTScrollContentView (created by ScrollView)
    in RCTScrollView (created by ScrollView)
    in ScrollView (created by ScrollView)
    in ScrollView (created by App)
    in RCTView (created by View)
    in View (created by App)
    in App (created by ExpoRoot)
    in ExpoRoot
    in RCTView (created by View)
    in View (created by AppContainer)
    in RCTView (created by View)
    in View (created by AppContainer)
    in AppContainer

This is my package.json:

{
  "main": "index.js",
  "scripts": {
    "start": "expo start --dev-client",
    "android": "expo start --android",
    "ios": "expo run:ios",
    "web": "expo start --web",
    "test": "jest",
    "e2e:test": "detox test -c android.emu.release  --debug-synchronization 3000 --take-screenshots failing",
    "e2e:build": "RN_SRC_EXT=e2e.ts detox build -c android.emu.release",
    "e2e:ci": "npm run e2e:build && npm run e2e:test",
    "e2e:test-ios": "detox test -c ios.emu.release --debug-synchronization 3000 --take-screenshots failing",
    "e2e:test-ios-showHierarchy": "detox test -c ios.emu.release --debug-synchronization 3000 --take-screenshots failing --capture-view-hierarchy enabled",
    "e2e:build-ios": "RN_SRC_EXT=e2e.ts detox build -c ios.emu.release",
    "e2e:ci-ios": "npm run e2e:build-ios && npm run e2e:test-ios"
  },
  "dependencies": {
    "expo": "~44.0.2",
    "expo-app-loading": "~1.3.0",
    "expo-splash-screen": "~0.14.1",
    "expo-status-bar": "~1.2.0",
    "react": "17.0.1",
    "react-dom": "17.0.1",
    "react-native": "0.64.3",
    "react-native-web": "0.17.1"
  },
  "devDependencies": {
    "@babel/core": "^7.16.5",
    "@babel/preset-env": "^7.16.5",
    "@babel/preset-typescript": "^7.16.5",
    "@expo/vector-icons": "^12.0.5",
    "@types/jest": "^27.0.3",
    "@types/react": "^17.0.38",
    "@types/react-native": "^0.66.10",
    "@types/react-test-renderer": "^17.0.1",
    "babel-jest": "^27.4.5",
    "babel-plugin-module-resolver": "^4.1.0",
    "detox": "^19.3.1",
    "jest": "^27.4.5",
    "react-native-vector-icons": "^9.0.0",
    "typescript": "^4.5.4"
  },
  "private": true
}

my app.json:

{
  "expo": {
    "name": "example",
    "slug": "example",
    "version": "1.0.0",
    "icon": "./appIcon.png",
    "assetBundlePatterns": [
      "**/*"
    ]
  },
  "name": "example"
}

my babel.config.ts:

const path = require("path");
const pak = require("../package.json");

module.exports = function (api) {
  api.cache(true);
  return {
    presets: [
      "babel-preset-expo",
      ["@babel/preset-env", { targets: { node: "current" } }],
      "@babel/preset-typescript",
    ],
    plugins: [
    [
      "module-resolver",
      {
        extensions: [".tsx", ".ts", ".js", ".json"],
        alias: {
          [pak.name]: path.join(__dirname, "..", pak.source),
        }
      }
    ]
  ]
  };
};

my metro.config.js:

const path = require("path");
const blacklist = require("metro-config/src/defaults/exclusionList");
const escape = require("escape-string-regexp");
const pak = require("../package.json");

const root = path.resolve(__dirname, "..");

const modules = Object.keys({
  ...pak.peerDependencies,
});

module.exports = {
  projectRoot: __dirname,
  watchFolders: [root],

  // We need to make sure that only one version is loaded for peerDependencies
  // So we blacklist them at the root, and alias them to the versions in example's node_modules
  resolver: {
    blacklistRE: blacklist(
      modules.map(
        (m) =>
          new RegExp(`^${escape(path.join(root, "node_modules", m))}\\/.*$`)
      )
    ),

    extraNodeModules: modules.reduce((acc, name) => {
      acc[name] = path.join(__dirname, "node_modules", name);
      return acc;
    }, {}),
  },

  transformer: {
    getTransformOptions: async () => ({
      transform: {
        experimentalImportSupport: false,
        inlineRequires: true,
      },
    }),
  },
};

Please help!!

jrodmora · January 24, 2022, 1:20pm

Answer posted here:

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Material Community Icons are undefined

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