Modular programming is a great way to reduce the effort of maintaining code and increase the reusability of code. However, it can be tricky to keep track of dependencies between different modules.
For this reason, RequireJS offers a number of features to help manage dependencies between different scripts. For example, it can alias URLs to JS files and HTML templates, and it can automatically reload a script once another one fails to load.
RequireJS also comes with a feature called fallback, which allows you to load scripts before the Document Object Model (DOM) is ready. This is important in some scenarios where developers may be able to interact with the DOM only when scripts are loaded completely.
Knockout has a number of features, including custom bindings that let you define how your data will be displayed in HTML. It also includes observable array functions, which can be used to automatically update UI elements when they contain changes to the data in the View Model.
Another important feature of Knockout is dependency tracking. This ensures that a page element is always synchronized with the view model, which helps to avoid strange exceptions or duplicated events.
The simplest way to implement this is by using the data-bind attribute in a HTML element. The value of the data-bind attribute consists of two parts: name and value.
Custom JS Modules
Magento 2 works according to module-based strategy where each module loads only when it’s needed. As a result, page load speed decreases and web solution performance improves.
In Magento, modules are logical groups that define new business features and interact with themes. They are designed to be independent and flexible enough for maximum site customization.
They can use a variety of libraries and languages. However, if one of the modules relies on another module, the dependency must be explicitly declared.
This is done using AMD (Asynchronous Module Definition) standards which allows the developer to define dependencies in a separate file. This helps reduce the number of modules in a Magento project and also makes the development process more efficient.
Custom JS modules can be created in Magento 2 and are added to your theme or module view JS files. They can be also added to the frontend XML layout file directly.
Data Binding is a way to connect the front-end of your application to a database. It provides a way to update your pages in real time based on changes in the data on the server.
It also allows you to bind an object or a collection of objects together, which lets you use features like sorting and filtering. It’s an essential part of the Magento experience.
The Angular framework is able to recognize two-way binding with the help of a special syntax. The syntax is a combination of square brackets and parentheses, [()].
It also supports dynamic bindings that update the UI when insertions or deletions are made in the source collection. These bindings are triggered when the underlying collection implements the INotifyCollectionChanged interface.