How to use import with absolute paths with Expo and React Native?

Update: Expo v32.0.0 and up

Expo init is creating a babel.config.js for you. Just add the plugins key to your babel.config.js file and add your alias. The env key is not needed anymore.

module.exports = function(api) {
  api.cache(true)

  return {
    presets: ['babel-preset-expo'],
    plugins: [
      [
        'module-resolver',
        {
          alias: {
            assets: './assets',
            components: './src/components',
            modules: './src/modules',
            lib: './src/lib',
            types: './src/types',
            constants: './src/constants',
          },
        },
      ],
    ],
  }
}

Update: Changes for Expo.io SDK v20.0.0

Since SDK v20.0.0 you can use the normal Babel Expo presets

{
  "presets": ["babel-preset-expo"],
  "env": {
    "development": {
      "plugins": ["transform-react-jsx-source"]
    }
  },
  "plugins": [
    ["module-resolver", {
      "alias": {
        "alias-name": "./app",
      }
    }]
  ]
}

Expo.io SDK v19.0.0 and before

Without the root-element, separating plugins and changing presets to babel-preset-react-native-stage-0/decorator-support, an alias work for me.

Using Expo.io on Version 16.0.0

Found this in the Expo Forums here: https://forums.expo.io/t/relative-paths-with-expo/654/3

Can you verify that this works on your case too?

{
  "presets": ["babel-preset-react-native-stage-0/decorator-support"],
  "env": {
    "development": {
      "plugins": ["transform-react-jsx-source"]
    }
  },
  "plugins": [
    ["module-resolver", {
      "alias": {
        "alias-name": "./app",
      }
    }]
  ]
}