Class kartik\bs4dropdown\Dropdown
Dropdown renders a Bootstrap 4.x dropdown menu component. This widget extends the default bootstrap yii\bootstrap4\Dropdown widget to include nested submenu behavior and styling.
For example,
<div class="dropdown">
<?php
echo \yii\helpers\Html::button('Dropdown Button', [
'id' => 'dropdownMenuButton',
'class' => 'btn btn-secondary dropdown-toggle'
'data-toggle' => 'dropdown',
'aria-haspopup' => 'true',
'aria-expanded' => 'false'
]);
echo Dropdown::widget([
'items' => [
['label' => 'Section 1', 'url' => '/'],
['label' => 'Section 2', 'url' => '#'],
[
'label' => 'Section 3',
'items' => [
['label' => 'Section 3.1', 'url' => '/'],
['label' => 'Section 3.2', 'url' => '#'],
[
'label' => 'Section 3.3',
'items' => [
['label' => 'Section 3.3.1', 'url' => '/'],
['label' => 'Section 3.3.2', 'url' => '#'],
],
],
],
],
],
'options' => ['aria-labelledby' => 'dropdownMenuButton']
]);
?>
</div>
See also https://getbootstrap.com/docs/4.6/components/dropdowns.
Public Properties
| Property | Type | Description | Defined By |
|---|---|---|---|
| $autoIdPrefix | string | The prefix to the automatically generated widget IDs. | yii\base\Widget |
| $behaviors | yii\base\Behavior[] | List of behaviors attached to this component. | yii\base\Component |
| $bsColCssPrefixes | array | The bootstrap grid column css prefixes mapping, the key is the bootstrap versions, and the value is an array containing the sizes and their corresponding grid column css prefixes. | kartik\base\BootstrapTrait |
| $bsCssMap | array | CSS conversion mappings across bootstrap library versions. | kartik\base\BootstrapTrait |
| $bsExtBasename | integer | The yii2 bootstrap extension base name (readonly property available via getter method getBsExtBasename()) | kartik\base\BootstrapTrait |
| $bsVer | integer | Bootstrap version number currently set (readonly property available via getter method getBsVer()) | kartik\base\BootstrapTrait |
| $bsVersion | integer|string | The bootstrap library version that you wish to use for this specific extension / widget. | kartik\base\BootstrapTrait |
| $clientEvents | array | The event handlers for the underlying Bootstrap JS plugin. | yii\bootstrap4\BootstrapWidgetTrait |
| $clientOptions | array | The options for the underlying Bootstrap JS plugin. | yii\bootstrap4\BootstrapWidgetTrait |
| $counter | integer | A counter used to generate $id for widgets. | yii\base\Widget |
| $defaultBtnCss | string | Default bootstrap button CSS (readonly property available via getter method getDefaultBtnCss()) | kartik\base\BootstrapTrait |
| $defaultIconPrefix | string | Default icon prefix (readonly property available via getter method getDefaultIconPrefix()) | kartik\base\BootstrapTrait |
| $dropdownClass | string | Bootstrap dropdown class name based on currently configured bootstrap version (readonly property available via getter method getDropdownClass()) | kartik\base\BootstrapTrait |
| $encodeLabels | boolean | Whether the labels for header items should be HTML-encoded. | yii\bootstrap4\Dropdown |
| $id | string|null | ID of the widget. Note that the type of this property differs in getter and setter. See getId() and setId() for details. | yii\base\Widget |
| $items | array | List of menu items in the dropdown. | yii\bootstrap4\Dropdown |
| $options | array | The HTML attributes for the widget container tag. | yii\bootstrap4\Widget |
| $stack | yii\base\Widget[] | The widgets that are currently being rendered (not ended). | yii\base\Widget |
| $submenuOptions | array|null | The HTML attributes for sub-menu container tags. | yii\bootstrap4\Dropdown |
| $view | yii\web\View | The view object that can be used to render views or view files. Note that the type of this property differs in getter and setter. See getView() and setView() for details. | yii\base\Widget |
| $viewPath | string | The directory containing the view files for this widget. | yii\base\Widget |
Protected Properties
| Property | Type | Description | Defined By |
|---|---|---|---|
| $_bsVer | integer | Current bootstrap version number | kartik\base\BootstrapTrait |
| $_defaultBtnCss | string | Default bootstrap button CSS | kartik\base\BootstrapTrait |
| $_defaultIconPrefix | string | Default icon CSS prefix | kartik\base\BootstrapTrait |
| $_isBs4 | boolean | Flag to detect whether bootstrap 4. | kartik\base\BootstrapTrait |
Public Methods
| Method | Description | Defined By |
|---|---|---|
| __call() | Calls the named method which is not a class method. | yii\base\Component |
| __clone() | This method is called after the object is created by cloning an existing one. | yii\base\Component |
| __construct() | Constructor. | yii\base\BaseObject |
| __get() | Returns the value of a component property. | yii\base\Component |
| __isset() | Checks if a property is set, i.e. defined and not null. | yii\base\Component |
| __set() | Sets the value of a component property. | yii\base\Component |
| __unset() | Sets a component property to be null. | yii\base\Component |
| addCssClass() | Adds bootstrap CSS class to options by parsing the bootstrap version for the specified Bootstrap CSS type. | kartik\base\BootstrapTrait |
| afterRun() | This method is invoked right after a widget is executed. | yii\base\Widget |
| attachBehavior() | Attaches a behavior to this component. | yii\base\Component |
| attachBehaviors() | Attaches a list of behaviors to the component. | yii\base\Component |
| beforeRun() | This method is invoked right before the widget is executed. | yii\base\Widget |
| begin() | Begins a widget. | yii\base\Widget |
| behaviors() | Returns a list of behaviors that this component should behave as. | yii\base\Component |
| canGetProperty() | Returns a value indicating whether a property can be read. | yii\base\Component |
| canSetProperty() | Returns a value indicating whether a property can be set. | yii\base\Component |
| className() | Returns the fully qualified name of this class. | yii\base\BaseObject |
| detachBehavior() | Detaches a behavior from the component. | yii\base\Component |
| detachBehaviors() | Detaches all behaviors from the component. | yii\base\Component |
| end() | Ends a widget. | yii\base\Widget |
| ensureBehaviors() | Makes sure that the behaviors declared in behaviors() are attached to this component. | yii\base\Component |
| getBSClass() | Gets the respective Bootstrap class based on currently configured bootstrap version. | kartik\base\BootstrapTrait |
| getBehavior() | Returns the named behavior object. | yii\base\Component |
| getBehaviors() | Returns all behaviors attached to this component. | yii\base\Component |
| getBsVer() | Gets the current set bootstrap version number. | kartik\base\BootstrapTrait |
| getCssClass() | Gets bootstrap css class by parsing the bootstrap version for the specified BS CSS type. | kartik\base\BootstrapTrait |
| getDefaultBtnCss() | Gets the default button CSS | kartik\base\BootstrapTrait |
| getDefaultIconPrefix() | Gets the default icon css prefix | kartik\base\BootstrapTrait |
| getDropdownClass() | Gets the respective bootstrap dropdown class name based on currently configured bootstrap version. | kartik\base\BootstrapTrait |
| getId() | Returns the ID of the widget. | yii\base\Widget |
| getView() | yii\bootstrap4\BootstrapWidgetTrait | |
| getViewPath() | Returns the directory containing the view files for this widget. | yii\base\Widget |
| hasEventHandlers() | Returns a value indicating whether there is any handler attached to the named event. | yii\base\Component |
| hasMethod() | Returns a value indicating whether a method is defined. | yii\base\Component |
| hasProperty() | Returns a value indicating whether a property is defined for this component. | yii\base\Component |
| init() | Initializes the widget. | yii\bootstrap4\BootstrapWidgetTrait |
| isBs() | Validate Bootstrap version | kartik\base\BootstrapTrait |
| isBs4() | Validate if Bootstrap 4.x version. | kartik\base\BootstrapTrait |
| off() | Detaches an existing event handler from this component. | yii\base\Component |
| on() | Attaches an event handler to an event. | yii\base\Component |
| removeCssClass() | Removes bootstrap CSS class from options by parsing the bootstrap version for the specified Bootstrap CSS type. | kartik\base\BootstrapTrait |
| render() | Renders a view. | yii\base\Widget |
| renderFile() | Renders a view file. | yii\base\Widget |
| run() | Renders the widget. | kartik\bs4dropdown\Dropdown |
| setId() | Sets the ID of the widget. | yii\base\Widget |
| setView() | Sets the view object to be used by this widget. | yii\base\Widget |
| trigger() | Triggers an event. | yii\base\Component |
| widget() | Creates a widget instance and runs it. | yii\base\Widget |
Protected Methods
| Method | Description | Defined By |
|---|---|---|
| configureBsVersion() | Configures the bootstrap version settings | kartik\base\BootstrapTrait |
| getBsExtBasename() | The yii2-bootstrap extension base name. | kartik\base\BootstrapTrait |
| initBsVersion() | Initializes bootstrap versions for the widgets and asset bundles. | kartik\base\BootstrapTrait |
| isSameVersion() | Compares two versions and checks if they are of the same major BS version. | kartik\base\BootstrapTrait |
| parseVer() | Parses and returns the major BS version | kartik\base\BootstrapTrait |
| registerClientEvents() | Registers JS event handlers that are listed in $clientEvents. | yii\bootstrap4\BootstrapWidgetTrait |
| registerPlugin() | Registers a specific Bootstrap plugin and the related events | yii\bootstrap4\BootstrapWidgetTrait |
| renderItems() | Renders menu items. | yii\bootstrap4\Dropdown |
Events
| Event | Type | Description | Defined By |
|---|---|---|---|
| EVENT_AFTER_RUN | yii\base\WidgetEvent | An event raised right after executing a widget. (available since version 2.0.11) | yii\base\Widget |
| EVENT_BEFORE_RUN | yii\base\WidgetEvent | An event raised right before executing a widget. (available since version 2.0.11) | yii\base\Widget |
| EVENT_INIT | yii\base\Event | An event that is triggered when the widget is initialized via init(). (available since version 2.0.11) | yii\base\Widget |