How to nest and chain your class functions with pure JS?

Learn how to effectively `nest` and `chain` class functions in JavaScript using the Templater example to build a custom HTML builder.
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How to Nest and Chain Your Class Functions with Pure JS?

When working with JavaScript, one might come across the need to nest and chain functions, especially when creating something as sophisticated as a custom HTML builder. If you've ever found yourself wondering how to accomplish this, you're not alone. The task of making class methods work seamlessly together can be tricky, but with the right approach, you can master it! In this guide, we'll explore how to create a Templater class that supports both nesting and chaining of methods.

Understanding the Problem

You want to build a custom HTML builder, Templater, which needs to support:

Nesting of elements: For example, you should be able to place other elements inside a <div> tag, representing structured content.

Chaining of methods: This functionality allows you to call multiple methods consecutively without needing additional variables.

The Required Solution

To accomplish this, we need to ensure that each method returns the object itself (this). Moreover, we'll create a custom toString method to return the markup collected so far. Here’s a step-by-step breakdown of how to achieve this:

Step 1: Transform Function

Create a function that transforms a list of tags into a string. This is essential for proper HTML output.

Step 2: Rewrite the Class as a Function

In JavaScript, functions can be used without needing the new keyword, unlike classes. This allows for a more flexible instantiation.

Step 3: Implement the Methods

Each method will add the corresponding HTML tag to an internal string and return the instance of the object for chaining.

Step 4: Adding the toString Method

This method will return the complete HTML markup as a string when called.

The Final Code Example

Here's how you can implement the Templater function:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Now you have a functional custom HTML builder that supports both nesting and chaining! By returning this in each method and maintaining a markup state, you can create complex HTML structures in a clean and readable way.

With the enhancements mentioned above, your Templater class is not only functional but also efficient and easy to use. Take this knowledge and experiment further; you can add more HTML tags and functionalities to tailor the Templater to your specific needs.

Happy coding!

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