How to Apply the Same JavaScript Function to Multiple Div IDs

Learn how to efficiently use JavaScript to apply functions to multiple div IDs without duplicating code, enhancing your web development skills!
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How to Apply the Same JavaScript Function to Multiple Div IDs

If you're working with multiple div elements in your web application, there may come a time when you need the same JavaScript function to operate on all of them. This is especially true when dealing with a dynamic content feature like shuffling lines of a poem in various sections of your webpage.

However, applying a JavaScript function to multiple div IDs can be tricky if you find yourself constrained to using IDs instead of classes. Luckily, there's a simple and effective way to achieve this without duplicating your code.

The Problem

You've got several divs, each with a unique ID, and you want them all to have the same functionality. In your case, you want them to shuffle the poem lines randomly every time the page is refreshed.

The Solution

Use querySelectorAll(): This method allows you to select multiple elements based on a CSS selector, making it easy to manage multiple IDs.

Utilize the forEach Loop: Once you've selected the divs, you can iterate over them with a forEach loop, applying your function to each one.

Implementation Steps

Here's how to implement the solution in detail:

JavaScript Code

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

Explanation of the Code

Iterating Through the Divs:

Shuffling with rndPoem Function: For each div, the rndPoem(div) function is called, which:

Splits the content of the div into an array of lines.

Shuffles the lines randomly.

Joins the shuffled lines back into a single string and returns that string to be set as the innerHTML of the div.

Example of HTML Structure

You would structure your HTML as follows to match the JavaScript code:

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

Conclusion

Now that you have the simplest method in your toolkit, you can create dynamic and engaging web experiences with ease!