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Introduction JS: Frontend architecture

Knowing how to use JavaScript and how to work with the DOM are the basic building blocks on which everything else is built. You need them to create applications that work well, are easily maintained, and can be extended, but they're not the only thing. There's actually much more. Working with the DOM without having a deep understanding of how code is organized will cause nothing but problems.

This approach still works for developers who make small widgets, for example, in jQuery. But as soon we get to making a full-fledged frontend application, the approaches that were used to create widgets will immediately prove themselves a disadvantage. Just add a dozen or so handlers and the code will turn into a load of unsupported spaghetti.

Fortunately, learning how to build architecture for frontend applications isn't that difficult. Moreover, all these approaches were developed decades ago, literally when the first visual interfaces first appeared. It's hard to believe now, but it was invented quite a long time ago.

Moreover, these approaches go virtually unchanged from framework to framework. That's why in this course, they'll be given in "raw" form, without reference to any frameworks. Here, we'll tell you about and explorer the underlying approaches that are instrumental when it comes to architecture.

The main subjects in this course are:

  • State management and organization
  • Model-View-Controller
  • Controlled and uncontrolled forms
  • Automata-based programming
  • Working with texts. Internationalization, localization, and pluralization

Preparation

Architectural issues come up for developers when they have worked with the code, at least a little, and see how quickly it becomes unsupported. This course is no exception, and it was created with slightly more experienced students in mind. This experience can be gained independently outside of Hexlet, as well as on Hexlet as part of the profession Frontend Developer. In terms of the program, this course comes after learning the JavaScript language itself, doing a few projects, and taking the course on the DOM API. If you don't know frontend development to this extent, we recommend you take this course later and carry on the profession without missing any practical assignments.


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