Tips for achieving a standard dropdown appearance in a collapsed navbar with Bootstrap split button dropdown

Trying to create a navbar with a split dropdown button has been a challenge. The design either goes awry when the screen is narrow and the navbar is hidden behind the toggle, or it doesn't look right on a wider screen when the navbar is expanded.

Currently using Bootstrap 5.0.2.

Stumbled upon this advice suggesting to add the d-table class to the button group. However, the outcome looks good in vertical mode but not in horizontal mode, as shown below:

https://i.sstatic.net/r72LP.png

https://i.sstatic.net/q2Rx0.png

Without the d-table class, it looks strange in vertical mode but fine in horizontal mode, like this:

https://i.sstatic.net/sZNxL.png

https://i.sstatic.net/i61YW.png

Desired look on small screens would be like this, with the split button:

https://i.sstatic.net/L6krs.png

One possible solution might involve using JavaScript to dynamically add or remove the d-table class based on screen width. This avoids hardcoding a specific screen width value. Alternatively, detecting when the navbar collapses could also work.

Snippet of the code used in this scenario:

CSS:


.dropdown-toggle-split {
    border: none;
    outline: none;
    position: relative;
}
...

HTML:


<!DOCTYPE html>
<html lang="en" class="h-100">
...

If you have any insight or a solution to share, it would be greatly appreciated!

Answer №1

After some trial and error, I found a workaround that seems to do the trick. By incorporating a Javascript snippet, I am now able to detect when the navbar collapses and refresh the DOM accordingly:

function checkNavBar() {
    let dropdownWrapper = $('#dropdownWrapper')
    if ($('#navToggle').is(':visible')) {
        dropdownWrapper.addClass("d-table");
    } else {
        dropdownWrapper.removeClass("d-table");
    }
}

$(window).resize(function () {
    checkNavBar();
})

$(window).ready(function () {
    checkNavBar();
})

The JQuery is() function is used in the initial function to determine the visibility of the navbar toggle button, which is then executed when the window is resized or when the page is loaded.

To ensure the dropdown menu expands to the full width, I incorporated some CSS targeting the specific button group within a displayed .navbar-collapse:

.navbar-collapse.show .btn-group {
    width: 100%;
}

While not the most elegant solution, it appears to serve its purpose effectively.

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