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Use popper to align dropdown menu instead of using css with important #22640

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merged 2 commits into from
May 17, 2017
Merged

Use popper to align dropdown menu instead of using css with important #22640

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ade9062
Use popper to align dropdown menu instead of using css with important
Johann-S May 17, 2017
f29882d
Merge branch 'v4-dev' into v4-dropdown-menu-align
Johann-S May 17, 2017
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31 changes: 28 additions & 3 deletions js/src/dropdown.js
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Original file line number Diff line number Diff line change
Expand Up @@ -52,8 +52,11 @@ const Dropdown = (($) => {
}

const ClassName = {
DISABLED : 'disabled',
SHOW : 'show'
DISABLED : 'disabled',
SHOW : 'show',
DROPUP : 'dropup',
MENURIGHT : 'dropdown-menu-right',
MENULEFT : 'dropdown-menu-left'
}

const Selector = {
Expand Down Expand Up @@ -142,7 +145,7 @@ const Dropdown = (($) => {
}

// Handle dropup
const dropdownPlacement = $(this._element).parent().hasClass('dropup') ? AttachmentMap.TOP : this._config.placement
const dropdownPlacement = $(this._element).parent().hasClass(ClassName.DROPUP) ? AttachmentMap.TOP : this._config.placement
this._popper = new Popper(this._element, this._menu, {
placement : dropdownPlacement,
modifiers : {
Expand All @@ -151,6 +154,11 @@ const Dropdown = (($) => {
},
flip : {
enabled : this._config.flip
},
beforeApplyStyle: {
order: 899, // 900 is the order of applyStyle
enabled: true,
fn: this._beforePopperApplyStyle
}
}
})
Expand Down Expand Up @@ -230,6 +238,23 @@ const Dropdown = (($) => {
return this._menu
}

_beforePopperApplyStyle(data) {
if ($(data.instance.popper).hasClass(ClassName.MENURIGHT)) {
data.styles = {
right: 0,
left: 'auto'
}
}

if ($(data.instance.popper).hasClass(ClassName.MENULEFT)) {
data.styles = {
right: 'auto',
left: 0
}
}
return data
}

// static

static _jQueryInterface(config) {
Expand Down
48 changes: 37 additions & 11 deletions js/tests/visual/dropdown.html
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Expand Up @@ -59,19 +59,45 @@ <h1>Dropdown <small>Bootstrap Visual Test</small></h1>
</li>
</ul>

<!-- Default dropup button -->
<div class="btn-group dropup" style="margin-top: 60px;">
<button type="button" class="btn btn-secondary">Dropup</button>
<button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<span class="sr-only">Toggle Dropdown</span>
</button>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
<div class="row">
<div class="col-sm-12 mt-4">
<!-- Default dropup button -->
<div class="btn-group dropup">
<button type="button" class="btn btn-secondary">Dropup</button>
<button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<span class="sr-only">Toggle Dropdown</span>
</button>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</div>

<div class="btn-group">
<button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
This dropdown's menu is right-aligned
</button>
<div class="dropdown-menu dropdown-menu-right">
<button class="dropdown-item" type="button">Action</button>
<button class="dropdown-item" type="button">Another action</button>
<button class="dropdown-item" type="button">Something else here</button>
</div>
</div>

<div class="btn-group">
<button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
This dropdown's menu is left-aligned
</button>
<div class="dropdown-menu dropdown-menu-left">
<button class="dropdown-item" type="button">Action</button>
<button class="dropdown-item" type="button">Another action</button>
<button class="dropdown-item" type="button">Something else here</button>
</div>
</div>
</div>
</div>
</div>
</div>

<script src="../../../docs/assets/js/vendor/jquery-slim.min.js"></script>
<script src="../../../docs/assets/js/vendor/popper.min.js"></script>
Expand Down
14 changes: 0 additions & 14 deletions scss/_dropdown.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -108,20 +108,6 @@
}
}

// Menu positioning
//
// Add extra class to `.dropdown-menu` to flip the alignment of the dropdown
// menu with the parent.
.dropdown-menu-right {
right: 0;
left: auto !important; // Reset the default from `.dropdown-menu`
}

.dropdown-menu-left {
right: auto !important;
left: 0;
}

.dropdown-menu.show {
display: block;
}
Expand Down