Скачать или смотреть How to Fix Bootstrap Items that are Collapsed on Page Load Using collapse Class

Learn how to properly implement Bootstrap's `collapse` functionality to prevent items from displaying on page load. This guide provides simple steps and tips for a seamless user experience.
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This video is based on the question https://stackoverflow.com/q/63069648/ asked by the user 'Rahul Chatterjee' ( https://stackoverflow.com/u/12058570/ ) and on the answer https://stackoverflow.com/a/63069760/ provided by the user 'trkaplan' ( https://stackoverflow.com/u/458679/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Fix Bootstrap Items that are Collapsed on Page Load

Bootstrap is a powerful front-end framework that helps developers create responsive websites with ease. One common feature in Bootstrap is the ability to create collapsible elements, which can enhance the user experience by allowing users to expand or collapse sections of content. However, you might encounter a situation where the collapsible items are visible on page load rather than remaining hidden until clicked. In this post, we will explore how to ensure your Bootstrap collapsible items function as intended.

Understanding the Issue

In a scenario where you want a section (like hardware) to stay collapsed when the page initially loads, you might face an issue where the items are displayed right away. This generally occurs if the HTML structure is not set up properly. The goal is to make sure the collapsible div starts off hidden, requiring user interaction to reveal the content.

Example HTML Structure

Here's an example of a collapsible section using Bootstrap:

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

Immediate Problem

If the content inside the # hardware div is visible as soon as the page loads, it’s likely due to improper class assignments.

Solution Steps

To ensure the hardware section remains collapsed upon loading, follow these steps:

1. Check Your Class Attributes

The primary issue in your original code is the class attribute on the second div. Bootstrap requires only the collapse class for the section you wish to keep hidden. Here's how to correct it:

Wrong Format:

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

Correct Format:

Option A: Remove class="hardware" entirely.

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

Option B: Combine both class attributes into one.

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

Both of these adjustments ensure the collapse class is correctly applied to keep the section hidden until toggled.

2. Implementing the Changes

Here is the corrected HTML structure for a collapsible section:

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

Conclusion

Ensuring that your Bootstrap collapsible items remain hidden on page load is a simple fix related to the application of class attributes. By ensuring that the collapse class is implemented correctly, you can achieve the desired behavior for your UI components. Remember, a clean structure not only helps the functionality but also improves code maintainability. Happy coding!