Angular

This guide shows you how to deploy an Angular application on Layer0.

This framework has a connector developed for Layer0. See Connectors for more information.

Getting Started

If you don’t already have an Angular application, you can create one using the following steps:

1. Create a new Angular App

npm install -g @angular/cli
ng new my-layer0-angular-app

You should now have a working starter app. Run ng serve to see the application running on localhost:4200.

2. Add SSR

To deploy your Angular application on Layer0 it needs to support server-side rendering (SSR). To add SSR support, run:

ng add @nguniversal/express-engine --clientProject {{PROJECT_NAME}}

(Note: the {{PROJECT_NAME}} value comes from the package.json file and should match the value of the name key.

Read more about server-side rendering in Angular here.

The previous command created:

A server-side application module (app.server.module.ts)
A bootstrapper for the server app (main.server.ts)
server.ts which exports an Express app
TypeScript configuration for the server (tsconfig.server.json)

You can now run npm run build:ssr && npm run serve:ssr to access your server-side rendered app at localhost:4000.

To prepare your Angular application for deployment on Layer0:

1. Install Layer0 CLI globally:

npm i -g @layer0/cli # yarn global add @layer0/cli

2. Run the following in the root folder of your project.

This will configure your project for Layer0

0 init

This will automatically add all of the required dependencies and files to your project. These include:

The @layer0/core package
The @layer0/angular package
The @layer0/cli package
layer0.config.js- Contains various configuration options for Layer0.
routes.js - A default routes file that sends all requests to the Angular Universal server. Update this file to add caching or proxy some URLs to a different origin.

3. Use the right angular project

If you have several projects and the defaultProject as specified in angular.json is not the project with the SSR build, specify the correct project with the ANGULAR_PROJECT environment variable. For example: ANGULAR_PROJECT=my-ssr-project 0 build.

Routing

The default routes.js file created by 0 init sends all requests to Angular server via a fallback route.

// This file was automatically added by 0 deploy.
// You should commit this file to source control.

const { Router } = require('@layer0/core/router')
import { angularRoutes } from '@layer0/angular'

export default new Router().use(angularRoutes)

Caching

The easiest way to add edge caching to your Angular app is to add caching routes before the middleware. For example, imagine you have a route /pages/c/:categoryId:

new Router()
  .get('/pages/c/:categoryId', ({ cache }) => {
    cache({
      browser: {
        maxAgeSeconds: 0,
        serviceWorkerSeconds: 60 * 60 * 24,
      },
      edge: {
        maxAgeSeconds: 60 * 60 * 24,
        staleWhileRevalidateSeconds: 60 * 60,
      },
    })
  })
  .use(angularRoutes)

Running Locally

To test your app locally, run:

0 run

You can do a production build of your app and test it locally using:

0 build && 0 run --production

Setting --production runs your app exactly as it will be when deployed to the Layer0 cloud.

If you have several projects and the defaultProject in angular.json is not the project you would like to deploy, specify the correct project by setting the ANGULAR_PROJECT environment variable when running 0 run.

For example:

ANGULAR_PROJECT=my-project 0 run

Deploying

Deploying requires an account on Layer0. Sign up here for free. Once you have an account, you can deploy to Layer0 by running the following in the root folder of your project:

0 deploy