Solving the Perplexing Issue with Bootstrap 4 Collapses in Pills Tabs using Rails 6 and Haml

Are you struggling to get Bootstrap 4 collapses to work seamlessly within pills tabs in your Rails 6 application using Haml? You’re not alone! This seemingly minor issue can be a major roadblock, but fear not, dear developer, for we’ve got you covered. In this comprehensive guide, we’ll delve into the heart of the problem and provide you with clear, step-by-step instructions to resolve this pesky issue once and for all.

Understanding the Problem

Before we dive into the solution, let’s take a closer look at the issue at hand. When using Bootstrap 4’s collapse component within pills tabs, you might notice that the collapse functionality ceases to work as expected. This is due to the way Bootstrap 4 handles the collapse plugin and the pills tabs component. The collapse plugin relies on the `data-toggle` attribute, which is not compatible with the pills tabs’ `data-bs-toggle` attribute. This conflict causes the collapse functionality to malfunction.

The Setup

For the sake of this tutorial, let’s assume you have a basic Rails 6 application set up with Bootstrap 4 and Haml. You’ve created a pills tabs component using Bootstrap 4’s pills tabs markup, and within one of the tabs, you’ve added a collapse component. Your Haml code might look something like this:

.container
  %ul.nav.nav-pills
    %li.nav-item
      %a.nav-link.active{"data-bs-toggle" => "pill", "href" => "#collapseExample", "role" => "tab", "aria-controls" => "collapseExample"} Collapse Example
    %li.nav-item
      %a.nav-link{"data-bs-toggle" => "pill", "href" => "#anotherTab", "role" => "tab", "aria-controls" => "anotherTab"} Another Tab

  .tab-content
    #collapseExample.collapse.show
      .card.card-body
        %p This is some sample content within the collapse component.

    #anotherTab.tab-pane.fade
      %p This is some sample content within another tab.

The Solution

To resolve this issue, we’ll need to create a custom JavaScript function that will handle the collapse functionality within the pills tabs. We’ll use Bootstrap 4’s collapse plugin and Rails 6’s jQuery to achieve this.

Step 1: Create a Custom JavaScript Function

In your Rails 6 application, create a new JavaScript file within the `app/javascript` directory, e.g., `bootstrap_collapses.js`. Add the following code to this file:

$(document).ready(function() {
  $('[data-bs-toggle="pill"]').on('shown.bs.tab', function(e) {
    var target = $(e.target).attr('href');
    $(target).find('.collapse').collapse('show');
  });

  $('[data-bs-toggle="pill"]').on('hidden.bs.tab', function(e) {
    var target = $(e.target).attr('href');
    $(target).find('.collapse').collapse('hide');
  });
});

This code listens for the `shown.bs.tab` and `hidden.bs.tab` events triggered by Bootstrap 4’s pills tabs component. When a tab is shown, it finds the collapse component within the tab and triggers the `show` method to display the content. Conversely, when a tab is hidden, it finds the collapse component and triggers the `hide` method to conceal the content.

Step 2: Update Your Haml Code

Update your Haml code to remove the `data-toggle` attribute from the collapse component and add a unique ID to each collapse component:

.container
  %ul.nav.nav-pills
    %li.nav-item
      %a.nav-link.active{"data-bs-toggle" => "pill", "href" => "#collapseExample", "role" => "tab", "aria-controls" => "collapseExample"} Collapse Example
    %li.nav-item
      %a.nav-link{"data-bs-toggle" => "pill", "href" => "#anotherTab", "role" => "tab", "aria-controls" => "anotherTab"} Another Tab

  .tab-content
    #collapseExample.collapse.show
      .card.card-body
        %p This is some sample content within the collapse component.

    #anotherTab.tab-pane.fade
      %p This is some sample content within another tab.

    #collapseExample2.collapse
      .card.card-body
        %p This is some sample content within another collapse component.

Step 3: Add the Custom JavaScript File to Your Application

In your `application.js` file, add the following line to include the custom JavaScript file:

//= require bootstrap_collapses

Putting it All Together

With these steps complete, your Bootstrap 4 collapses should now work seamlessly within pills tabs using Rails 6 and Haml. When you click on a tab, the corresponding collapse component will be displayed or hidden accordingly. Take a deep breath, pat yourself on the back, and bask in the glory of your hard-earned accomplishment!

Troubleshooting Tips

If you’re still experiencing issues, here are some troubleshooting tips to keep in mind:

• Ensure that you’ve included the Bootstrap 4 collapse plugin in your application.
• Verify that you’ve added the custom JavaScript file to your application.
• Check that you’ve removed the `data-toggle` attribute from the collapse component.
• Make sure you’ve added a unique ID to each collapse component.

Issue	Solution
Collapse component not displaying	Verify that you’ve added the `show` class to the collapse component.
Collapse component not hiding	Check that you’ve added the `hide` class to the collapse component when the tab is hidden.
Multiple collapse components not working	Ensure that each collapse component has a unique ID.

Conclusion

In conclusion, resolving the issue with Bootstrap 4 collapses in pills tabs using Rails 6 and Haml requires a bit of creativity and ingenuity. By creating a custom JavaScript function and updating your Haml code, you can successfully overcome this pesky problem and create a seamless user experience. Remember to troubleshoot any issues that may arise, and don’t hesitate to seek help when needed. Happy coding!

Keywords: Bootstrap 4, collapses, pills tabs, Rails 6, Haml, issue, solution, tutorial, guide, JavaScript, jQuery, troubleshooting tips.

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