Tips for making a Bootstrap dropdown submenu appear as a 'dropup'

Question

Tips for making a Bootstrap dropdown submenu appear as a 'dropup'

I'm using a Bootstrap dropdown menu with a submenu that should drop upwards while the rest of the menu drops down. How can I achieve this? Here is the code snippet:

<div class="dropdown">
    <a class="inputBarA dropdown-toggle" data-toggle="dropdown" href="#">FILTER</a>
    <ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
        <li role="presentation">
            <a role="menuitem" href="#">Text</a>
        </li>
        <li role="presentation">
            <label>Label name</label>
            <label>Label name</label>
            <label class="checkbox">
                <input type="checkbox">
                Text </label>
            <label class="checkbox">
                <input type="checkbox">
                Text </label>
            <label class="checkbox">
                <input type="checkbox">
                Text </label>
            <label class="checkbox">
                <input type="checkbox">
                Text </label>
        </li>
        <li class="dropdown-submenu">
            <a tabindex="-1" href="#">Centralities</a>
            <ul class="dropdown-menu" style="bottom: 100%">
                <label class="radio">
                    <input type="radio" name="options" id="optionsRadios1" value="A" checked>
                    AA </label>
                <label class="radio">
                    <input type="radio" name="options" id="optionsRadios2" value="B">
                    BB </label><label class="radio">
                    <input type="radio" name="options" id="optionsRadios2" value="C">
                    CC </label><label class="radio">
                    <input type="radio" name="options" id="optionsRadios2" value="D">
                    DD </label><label class="radio">
                    <input type="radio" name="options" id="optionsRadios2" value="E">
                    EE </label>
            </ul>
        </li>
    </ul>
</div>

html css twitter-bootstrap drop-down-menu

Answer 1

Answer №1

The optimal resolution:

<div class="dropup">
   <ul class="dropdown-menu"></ul>
</div>

This is a built-in feature in bootstrap. By examining the css file of bootstrap (version 3.1.1), I discovered the selector .dropup .dropdown-menu.

Answer 2

The optimal resolution:

<div class="dropup">
   <ul class="dropdown-menu"></ul>
</div>

This is a built-in feature in bootstrap. By examining the css file of bootstrap (version 3.1.1), I discovered the selector .dropup .dropdown-menu.

Answer 3

Answer №2

It seems like the solution provided below outlines the process of creating it from scratch, I wasn't aware that there was a dropup class in Bootstrap...

So to simplify things in Bootstrap, you just need to add the "dropup" class to the <ul> in earlier versions of bootstrap:

 <ul class="dropdown-menu dropup" role="menu" aria-labelledby="dLabel">

But for newer versions of bootstrap (v3), you should apply the "dropup" class to the container of the <ul> instead of directly to the <ul>:

<div class="dropup">
    <ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
</div>

Check out http://jsfiddle.net/ZgyZP/5/

Here's an alternative approach that doesn't rely on bootstrap:

You can use JavaScript to calculate the height of the submenu and then adjust its position accordingly.

For example (using jQuery):

$('.dropdown-submenu').hover(
    function(){
    //hover in 
        $('.dropdown-submenu > ul').css('top', '-' + $('.dropdown-submenu > ul').css('height'));

    },
    //hover out
    function(){
    }
);

See the Fiddle here: http://jsfiddle.net/ZgyZP/4/

Answer 4

It seems like the solution provided below outlines the process of creating it from scratch, I wasn't aware that there was a dropup class in Bootstrap...

So to simplify things in Bootstrap, you just need to add the "dropup" class to the <ul> in earlier versions of bootstrap:

 <ul class="dropdown-menu dropup" role="menu" aria-labelledby="dLabel">

But for newer versions of bootstrap (v3), you should apply the "dropup" class to the container of the <ul> instead of directly to the <ul>:

<div class="dropup">
    <ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
</div>

Check out http://jsfiddle.net/ZgyZP/5/

Here's an alternative approach that doesn't rely on bootstrap:

You can use JavaScript to calculate the height of the submenu and then adjust its position accordingly.

For example (using jQuery):

$('.dropdown-submenu').hover(
    function(){
    //hover in 
        $('.dropdown-submenu > ul').css('top', '-' + $('.dropdown-submenu > ul').css('height'));

    },
    //hover out
    function(){
    }
);

See the Fiddle here: http://jsfiddle.net/ZgyZP/4/

Answer 5

Answer №3

Utilize the up class for dropdown menus: <ul class="dropdown up">

Add styling to the up class:

.up { bottom:100% !important; top:auto !important; }

Important: Adjust the bottom value based on your button size.

Answer 6

Utilize the up class for dropdown menus: <ul class="dropdown up">

Add styling to the up class:

.up { bottom:100% !important; top:auto !important; }

Important: Adjust the bottom value based on your button size.

Answer 7

Answer №4

<div class="dropup">
   <ul class="dropdown-menu"></ul>
</div>

The provided code snippet is correct, however it will not function as intended unless a parent element has the position property set.

For example, you can use a class like class="col-lg-12", or simply add the following inline style to a div:

<div style="position: relative;">

This code uses Bootstrap version 3.0.0.

Answer 8

<div class="dropup">
   <ul class="dropdown-menu"></ul>
</div>

The provided code snippet is correct, however it will not function as intended unless a parent element has the position property set.

For example, you can use a class like class="col-lg-12", or simply add the following inline style to a div:

<div style="position: relative;">

This code uses Bootstrap version 3.0.0.

Answer 9

Answer №5

The implementation of the dropup Class exceeded my expectations and worked flawlessly.

<div class="col-md-6 dropup">
                <span uib-dropdown auto-close="outsideClick">
                    <p class="input-group">
                        <input type="text" class="form-control" ng-model="int.schTimeFormatted" ng-disabled="true" name="schTime" />
                        <span class="input-group-btn">
                            <button type="button" class="btn btn-default cal" uib-dropdown-toggle>
                                <i class="glyphicon glyphicon-time"></i>
                            </button>
                        </span>
                    </p>
                    <ul class="dropdown-menu" uib-dropdown-menu aria-labelledby="simple-dropdown">
                        <li class="timerDropdown">
                            <div class="row">
                                <div class="col-md-6">
                                    <div uib-timepicker ng-model="int.schTime" ng-change="changed()" hour-step="hstep" minute-step="mstep" readonly-input="true" min="min"
                                        max="max" show-meridian="ismeridian"></div>
                                </div>

                                <div>
                                    Booked Appointments
                                    <ul id="timeListB">
                                        <li ng-repeat="time in bookedAppointments">{{time | date:"h:mma"}}</li>
                                    </ul>
                                </div>
                            </div>
                           <hr>
                            <button class="pull-right">close</button>
                        </li>
                    </ul>
                </span>
            </div>

Answer 10

The implementation of the dropup Class exceeded my expectations and worked flawlessly.

<div class="col-md-6 dropup">
                <span uib-dropdown auto-close="outsideClick">
                    <p class="input-group">
                        <input type="text" class="form-control" ng-model="int.schTimeFormatted" ng-disabled="true" name="schTime" />
                        <span class="input-group-btn">
                            <button type="button" class="btn btn-default cal" uib-dropdown-toggle>
                                <i class="glyphicon glyphicon-time"></i>
                            </button>
                        </span>
                    </p>
                    <ul class="dropdown-menu" uib-dropdown-menu aria-labelledby="simple-dropdown">
                        <li class="timerDropdown">
                            <div class="row">
                                <div class="col-md-6">
                                    <div uib-timepicker ng-model="int.schTime" ng-change="changed()" hour-step="hstep" minute-step="mstep" readonly-input="true" min="min"
                                        max="max" show-meridian="ismeridian"></div>
                                </div>

                                <div>
                                    Booked Appointments
                                    <ul id="timeListB">
                                        <li ng-repeat="time in bookedAppointments">{{time | date:"h:mma"}}</li>
                                    </ul>
                                </div>
                            </div>
                           <hr>
                            <button class="pull-right">close</button>
                        </li>
                    </ul>
                </span>
            </div>

Tips for making a Bootstrap dropdown submenu appear as a 'dropup'

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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