In this chapter, we covered how assets work and are managed in Yii2. We explored the basics of asset bundle files and their integration with Yii2's asset manager. We also explored how we can use the asset command to build configuration files and to combine and compress our assets. Finally, we explored three third-party tools: NodeJS, Bower, and Grunt, and illustrated how we can use those tools in conjunction with our asset bundle to automate the building of our asset files.
Having explored the front-end aspect of Yii, in the next chapter, we're going to return to the backend to learn how we can handle user authentication and authorization within our application, as well as cover how we can set up access control filters and rule-based authentication within our app.