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WP Engine |Headless Platform

Angular Template Hierarchy and Data Fetching

Angular Template Hierarchy and Data fetching Example

In this example we show how to implement the WordPress Template Hierarchy in Angular for use with a Headless WordPress backend using WPGraphQL.

Getting Started

Important

Docker Desktop needs to be installed to run WordPress locally.

  1. Run npm run example:setup to install dependencies and configure the local WP server.
  2. Configure CORS: Create a file named .env inside the /backend directory and add the following content to set the allowed frontend URL: 
    FRONTEND_URL=http://localhost:4200
    (For more details on the backend service, please refer to the /backend/README.md file.)
  3. Run npm run backend:start starts the backend server for template fetching at http://localhost:3000/api/templates
  4. Run npm run example:start to start the WordPress server and Angular development server.
Note

When you kill the long running process this will not shutdown the local WP instance, only Angular. You must run npm run example:stop to kill the local WP server.

Trouble Shooting

  1. I get “Page Not Found. Sorry, the page you are looking for does not exist. Please check the URL.” when opening the Angular app and trying to navigate through it.
  • Run npm run backend:start and verify that http://localhost:3000/api/templates returns correct data.
  • Verify that you have created the /backend/.env file with the correct FRONTEND_URL to resolve CORS issues.
  • Check for any errors in the console.
  1. In some cases, you might have to install @angular/cli globally. In /example-app/ run npm install -g @angular/cli@latest
  2. To reset the WP server and re-run setup you can run npm run example:prune and confirm “Yes” at any prompts.