Скачать или смотреть Fixing Bootstrap Collapse Issues Inside for Loops in EJS

Learn how to fix issues with Bootstrap Collapse inside for loops in EJS, ensuring that your dynamic content is interactive and functional.
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This video is based on the question https://stackoverflow.com/q/62935314/ asked by the user 'mamadgi aishwarya' ( https://stackoverflow.com/u/13581669/ ) and on the answer https://stackoverflow.com/a/62935819/ provided by the user 'Ariel' ( https://stackoverflow.com/u/1119495/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting Bootstrap Collapse Inside For Loops in EJS

When working with dynamic content in web development, it’s common to use templating engines like EJS (Embedded JavaScript), especially when you're generating content based on an array of data. However, you may encounter issues when trying to implement Bootstrap Collapse functionality within a for loop in EJS. This guide addresses a common problem and provides a structured solution to make your collapsible elements work seamlessly.

The Problem

Imagine you're creating an interface that displays a list of titles, each of which should expand to show detailed descriptions when clicked. However, if the collapse feature is not functioning as intended, it can be frustrating. In this instance, you might experience issues when trying to concatenate index values (from your loop) to dynamically generated IDs, which is crucial for Bootstrap to identify which sections to collapse or expand.

Sample Code

Here’s an example of the problematic code you might encounter:

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The Solution

To resolve the issues with Bootstrap Collapse in your EJS for loop, you need to make two primary adjustments in your code. Let’s break them down step by step.

1. Correctly Concatenating the Index to Your ID

To append the index i to your ID attributes, use the <%= variable %> syntax correctly. Instead of concatenating directly with the + operator, format it like this:

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This change is necessary in two places, specifically where you define your data-target and id attributes.

2. Proper Syntax for Collapsing Items by ID

When using Bootstrap's collapse feature, ensure that the data-target references the complete ID format with a # symbol. Update your code to ensure that it points to the correct ID of the collapsible element. It should look like this:

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This will allow Bootstrap to recognize and interact with the correct element whenever a button is clicked.

Updated Code Example

With these solutions in place, your updated code should resemble the following:

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Additional Considerations

Don’t forget to include the necessary Bootstrap and jQuery libraries for your collapsible components to function correctly. Ensure that you link to these scripts in your HTML file before your closing </body> tag. This can typically look something like this:

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Conclusion

By following these corrections, you can easily integrate Bootstrap Collapse functionality within a for loop in your EJS templates. This provides a more interactive and user-friendly experience for your users. Happy coding!