Why is My Navbar Dropdown Not Collapsing in Bootstrap 5?

Troubleshooting Navbar Dropdown Collapse in Bootstrap 5

Bootstrap 5 brings about significant changes, including modifications to the data-toggle attributes for JavaScript plugins. Addressing the issue where the navbar dropdown is not functioning in Bootstrap 5 requires updating these attributes.

In previous Bootstrap versions, the collapse functionality was initiated by the data-toggle="collapse" attribute. However, Bootstrap 5 requires the use of data-bs-toggle="collapse" instead.

Likewise, the data-target attribute, which specifies the ID of the element to be collapsed or expanded, should be updated to data-bs-target.

Updated Code:

<button>

In addition to the changes mentioned above, it's important to note that Bootstrap 5 has introduced new classes for margins:

• mr-auto, the right margin auto class, is replaced by me-auto.
• ml-auto, the left margin auto class, is replaced by ms-auto.

By incorporating these updates, the navbar dropdown collapse fonctionnalité should function as expected in Bootstrap 5.

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