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The ng serve command launches a local development server for the Siget application using the @angular/build:dev-server builder. It compiles your application in development mode by default, watches source files for changes, and automatically reloads the browser — making it the primary workflow command during day-to-day development.

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Synopsis

ng serve [project] [options]
npm start

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Options

OptionTypeDefaultDescription
--portnumber4200Port number to listen on
--hoststringlocalhostHostname or IP address to bind the server to
--open / -obooleanfalseAutomatically open the app in the default browser after starting
--configuration / -cstringdevelopmentNamed build configuration to use (e.g. production, development)
--watchbooleantrueRebuild and reload on source file changes
--sslbooleanfalseServe the application over HTTPS

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Examples

# Start the dev server on the default port 4200
ng serve

# Start on a custom port and open the browser automatically
ng serve --port 3000 --open

# Serve using the production build configuration
ng serve --configuration production

# Bind to all network interfaces (accessible on your local network)
ng serve --host 0.0.0.0
The npm start script in package.json maps directly to ng serve, so both commands are equivalent. Use whichever fits your workflow.

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Configuration in angular.json

Siget’s serve architect target is defined in angular.json and delegates to @angular/build:dev-server. Each named configuration points to the corresponding build target so the dev server always uses the correct compiler options. 
"serve": {
  "builder": "@angular/build:dev-server",
  "configurations": {
    "production": {
      "buildTarget": "siget:build:production"
    },
    "development": {
      "buildTarget": "siget:build:development"
    }
  },
  "defaultConfiguration": "development"
}
The defaultConfiguration is set to development, which means ng serve always starts in development mode unless you override it with --configuration. The development build configuration disables optimization and enables source maps, giving you fast rebuilds and readable stack traces while you work.

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