Скачать или смотреть Convert jQuery to Pure JavaScript: A Step-by-Step Guide for Input Manipulation

Discover how to effectively use the `replace` function in JavaScript to transform numeric inputs into letters. Learn through a simple conversion from `jQuery` to pure `JavaScript` code.
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Converting jQuery Input Manipulation to Pure JavaScript

If you’ve been working with jQuery and are looking to transition to pure JavaScript, you may find certain features a bit tricky, especially when it comes to input manipulation. Today, we will tackle a common scenario where numeric values entered in an input box are converted into letters. In this guide, we will convert a jQuery function that performs this task into pure JavaScript and clarify how to do it effectively.

The Original jQuery Code

Here’s a snippet of the original jQuery code that you might be familiar with:

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

Understanding the Code

Event Binding: The code uses bind to attach event listeners for change, keyup, and input. This integrates user input changes dynamically.

Replacement Logic: It uses a series of replace functions to swap numeric values with corresponding letters.

However, if you want to move away from jQuery and leverage the capabilities of modern JavaScript, let’s see how we can achieve the same functionality.

The Equivalent Pure JavaScript Code

Here’s how you can write the same functionality using pure JavaScript:

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

Breakdown of the JavaScript Code

Substitutions Object: A substitutions object is created to map number strings to their respective letter replacements.

Window Onload Function: We use window.onload to ensure the input field is ready for manipulation as soon as the webpage loads.

Event Listener: We attach an input event listener directly to the input element using addEventListener.

Input Value Replacement: The replace method is enhanced with a callback function, ensuring each numeric character is replaced according to the substitutions object.

Why Use This Approach?

Reduced Library Dependency: Using pure JavaScript minimizes reliance on jQuery, which can be beneficial for performance and compatibility.

Simpler Code: This approach is cleaner and more straightforward, providing enhanced readability.

Conclusion

Transitioning from jQuery to pure JavaScript can be daunting at first, but with a deeper understanding of how events and string manipulation works in JavaScript, you can enjoy a more versatile coding experience. By converting jQuery functionalities into JavaScript, you empower your project with more control and potentially better performance.

Now, you’re equipped with the knowledge to replicate the jQuery functionality using pure JavaScript efficiently. Happy coding!