Configuring your Project

The nativescript.config.ts is a central place to configure your project. It allows you to configure your project structure, application id, runtime related flags and more.

By default a config looks somewhat like the following

import { NativeScriptConfig } from '@nativescript/core'

export default {
  id: 'org.nativescript.app',
  appPath: 'app',
  appResourcesPath: 'App_Resources',
  android: {
    v8Flags: '--expose_gc',
    markingMode: 'none',
  },
} as NativeScriptConfig

Configuration Reference ​

id ​

id: string = 'com.mycompany.myapp'

Controls the Application ID of your app, this setting can be overridden per platform via ios.id and android.id.

main ​

main: string = './src/custom-main.ts'

Sets the entry point to your app. This value is usually set in package.json in the main field.

appPath ​

appPath: string = 'custom-src'

Specifies where your app source is located, usually src or app.

appResourcesPath ​

appResourcesPath: string = '../shared/app_resources'

Specifies where your app resources are located, usually App_Resources.

webpackConfigPath ​

webpackConfigPath: string = 'custom-webpack.config.js'

Specifies the webpack config location. The default is webpack.config.js in the root.

profiling ​

profiling: 'counters' | 'timeline' | 'lifecycle' = "timeline"

Enable profiler logs. In most cases when profiling, you would use timeline.

cssParser ​

cssParser: 'rework' | 'nativescript' | 'css-tree' = "css-tree"

Set the default CSS parser that NativeScript will use, by default it uses css-tree.

ignoredNativeDependencies ​

ignoredNativeDependencies: string[] = ['@nativescript/imagepicker']

A list of npm package names to ignore when attaching native dependencies to the build.

cli ​

cli: Object = {}

See CLI Configuration Reference

android ​

android: Object = {}

See Android Configuration Reference

ios ​

ios: Object = {}

See iOS Configuration Reference

hooks ​

hooks: Array = []

See Hooks Configuration Reference

CLI Configuration Reference ​

cli.packageManager ​

cli.packageManager: 'npm' | 'yarn' | 'pnpm' | 'yarn2' = 'yarn';

Sets the package manager to use for this project.

Defaults to the package manager set with the CLI (ns package-manager set yarn), or npm if not set.

cli.pathsToClean ​

pathsToClean?: string[];

Overrides the files or paths to clean when running the ns clean command.

cli.additionalPathsToClean ​

additionalPathsToClean?: string[];

Additional files or paths to clean when running the ns clean command, the paths are appended to the default list of paths.

Android Configuration Reference ​

android.id ​

android.id: string = 'com.mycompany.myapp.android';

Controls the Application ID of your Android app, this setting overrides the value set in id.

See also ios.id.

android.discardUncaughtJsExceptions ​

android.discardUncaughtJsExceptions: boolean = true;

Discard any uncaught JS exceptions. This can be useful in production environments where you don't want your app to crash in case an unexpected JS exception is thrown.

android.v8Flags ​

android.v8Flags: string = "--expose_gc --trace=true";

Flags passed to the v8 runtime. --expose_gc is required for the runtime to function properly.

For a list of available v8 flags see this Gist.

android.codeCache ​

android.codeCache: boolean = true;

Enables the v8 code-cache.

android.gcThrottleTime ​

android.gcThrottleTime: number = 20; // in ms

Trigger a gc periodically (in ms). Defaults to 0 (disabled).

android.markingMode ​

android.markingMode: 'none' | 'full';

Sets the default gc marking mode, defaults to none.

android.handleTimeZoneChanges ​

android.handleTimeZoneChanges: boolean = true;

Notify the app when the timezone changes, defaults to false.

android.maxLogcatObjectSize ​

android.maxLogcatObjectSize: number = 9999;

Sets the max length of a single output string. Defaults to 1024.

android.forceLog ​

android.forceLog: boolean = true;

Enable logging in Release mode. Defaults to false.

android.memoryCheckInterval ​

android.memoryCheckInterval: number; // in ms

Sets the frequency of the freeMemoryRatio check.

android.freeMemoryRatio ​

android.freeMemoryRatio: number;

Percentage of memory (0.0 to 1.0) before it forces a GC. Defaults to 0 (disabled).

When set, it also requires memoryCheckInterval to be set.

android.enableLineBreakpoints ​

android.enableLineBreakpoints: boolean;

Used for advanced debugging.

android.enableMultithreadedJavascript ​

android.enableMultithreadedJavascript: boolean;

Enable the multithreaded JavaScript engine. Defaults to false.

iOS Configuration Reference ​

ios.id ​

ios.id: string = 'com.mycompany.myapp.ios';

Controls the Bundle Identifier of your iOS app, this setting overrides the value set in id.

See also android.id.

ios.discardUncaughtJsExceptions ​

ios.discardUncaughtJsExceptions: boolean = true;

Discard any uncaught JS exceptions. This can be useful in production environments where you don't want your app to crash in case an unexpected JS exception is thrown.

ios.SPMPackages ​

ios.SPMPackages: Array<{
  name: string;
  libs: Array<string>;
  repositoryURL: string;
  version: string;
}>

Allows defining Swift Package Manager dependencies that should be installed into the project. Any dependencies listed here, similar to Cocoapods dependencies will be built with the project. This means you can generate typings for them via ns typings ios for TypeScript usage.

Example ​

// ...
ios: {
  SPMPackages: [
    {
      name: 'swift-numerics',
      libs: ['Numerics'],
      repositoryURL: 'https://github.com/apple/swift-numerics.git',
      version: '1.0.0',
    },
  ]
}

Hooks Configuration Reference ​

hooks: [
  {
    type: 'before-<hookName>' | 'after-<hookName>',
    script: './path/to/script.js',
  },
]

Allows defining project-persistent hooks.

Available hooks (prefix with before- or after-):

• buildAndroidPlugin - Builds aar file for Android plugin, runs during prepareNativeApp
• buildAndroid - Builds Android app
• buildIOS - Builds iOS app
• checkEnvironment - Validate project env, runs during ns doctor, ns clean, and most build commands
• checkForChanges - Changes occurred during watch
• install - Application installed to device/emulator
• prepare - Compiles webpack and prepares native app in platforms folder
• prepareNativeApp - Preparing the actual native app, runs during prepare/watch hook
• resolveCommand - Resolves command and arguments, runs before all CLI commands
• watch - Set up watchers for live sync, runs during prepare hook
• watchPatterns - Set up watch patterns, runs during watch hook