Dropdown
<et2-dropdown> | Et2Dropdown
Properties
| Name | Description | Reflects | Type | Default |
|---|---|---|---|---|
accesskey
|
Accesskey provides a hint for generating a keyboard shortcut for the current element. The attribute value must consist of a single printable character. |
|
string
|
- |
align
|
Used by Et2Box to determine alignment. Allowed values are left, right |
|
string
|
- |
class
|
CSS Class. This class is applied to the outside, on the web component itself. Due to how WebComponents work, this might not change anything inside the component. |
|
string
|
- |
containingElement
|
The dropdown will close when the user interacts outside of this element (e.g. clicking). Useful for composing other components that use a dropdown internally. |
HTMLElement | undefined
|
- | |
data
|
Set the dataset from a CSV |
string
|
- | |
deferredProperties
|
Any attribute that refers to row content cannot be resolved immediately, but some like booleans cannot stay a string because it’s a boolean attribute. We store them for later, and parse when they’re fully in their row. If you are creating a widget that can go in a nextmatch row, and it has boolean attributes that can change for each row, add those attributes into deferredProperties | - | - | |
disabled
|
Defines whether this widget is visibly disabled. The widget is still visible, but clearly cannot be interacted with. Widgets disabled in the template will not return a value to the application code, even if re-enabled via javascript before submitting. To allow a disabled widget to be re-enabled and return a value, disable via javascript in the app’s et2_ready() instead of an attribute in the template file. |
|
boolean
|
false
|
distance
|
The distance in pixels from which to offset the panel away from its trigger. |
number
|
0
|
|
dom_id
|
Get the actual DOM ID, which has been prefixed to make sure it’s unique. |
string
|
- | |
hidden
|
The widget is not visible. As far as the user is concerned, the widget does not exist. Widgets hidden with an attribute in the template may not be created in the DOM, and will not return a value. Widgets can be hidden after creation, and they may return a value if hidden this way. |
|
boolean
|
- |
hoist
|
Enable this option to prevent the panel from being clipped when the component is placed inside a
container with
overflow: auto|scroll. Hoisting uses a fixed positioning strategy that works in many,
but not all, scenarios.
|
boolean
|
false
|
|
id
|
Get the ID of the widget |
string
|
- | |
label
|
The label of the widget This is usually displayed in some way. It’s also important for accessability. This is defined in the parent somewhere, and re-defining it causes labels to disappear |
string
|
- | |
noLang
|
Disable any translations for the widget |
boolean
|
- | |
open
|
Indicates whether or not the dropdown is open. You can toggle this attribute to show and hide the
dropdown, or you can use the show() and hide() methods and this attribute
will reflect the dropdown’s open state.
|
|
boolean
|
false
|
parentId
|
Parent is different than what is specified in the template / hierarchy. Widget ID of another node to insert this node into instead of the normal location |
string
|
- | |
placement
|
The preferred placement of the dropdown panel. Note that the actual placement may vary as needed to keep the panel inside of the viewport. |
|
| 'top' | 'top-start' | 'top-end' | 'bottom' | 'bottom-start' | 'bottom-end' | 'right' |
'right-start' | 'right-end' | 'left' | 'left-start' | 'left-end'
|
'bottom-start'
|
skidding
|
The distance in pixels from which to offset the panel along its trigger. |
number
|
0
|
|
statustext
|
Tooltip which is shown for this element on hover |
|
string
|
- |
stayOpenOnSelect
stay-open-on-select
|
By default, the dropdown is closed when an item is selected. This attribute will keep it open instead. Useful for dropdowns that allow for multiple interactions. |
|
boolean
|
false
|
styles
|
WebComponent * | - | - | |
sync
|
Syncs the popup width or height to that of the trigger element. |
|
'width' | 'height' | 'both' | undefined
|
undefined
|
options
|
Get property-values as object
use widget methods |
object
|
- | |
supportedWidgetClasses
|
et2_widget compatability
Legacy compatability. Some legacy widgets check their parent to see whats allowed |
array
|
[]
|
|
updateComplete |
A read-only promise that resolves when the component has finished updating. |
Learn more about attributes and properties.
Methods
| Name | Description | Arguments |
|---|---|---|
checkCreateNamespace()
|
Checks whether a namespace exists for this element in the content array. If yes, an own perspective of the content array is created. If not, the parent content manager is used. Constructor attributes are passed in case a child needs to make decisions | - |
clone()
|
Creates a copy of this widget. |
_parent: et2_widget
|
createElementFromNode()
|
Create a et2_widget from an XML node. First the type and attributes are read from the node. Then the readonly & modifications arrays are checked for changes specific to the loaded data. Then the appropriate constructor is called. After the constructor returns, the widget has a chance to further initialize itself from the XML node when the widget’s loadFromXML() method is called with the node. |
_node: , _name:
|
getArrayMgr()
|
Returns the array manager object for the given part |
managed_array_type: string
|
getArrayMgrs()
|
Returns an associative array containing the top-most array managers. |
_mgrs: object
|
getChildren()
|
Get child widgets Use |
- |
getInstanceManager()
|
Returns the instance manager | - |
getPath()
|
Returns the path into the data array. By default, array manager takes care of this, but some extensions need to override this | - |
getRoot()
|
Returns the base widget Usually this is the same as getInstanceManager().widgetContainer | - |
hide()
|
Hides the dropdown panel | - |
loadFromXML()
|
Loads the widget tree from an XML node |
_node:
|
loadingFinished()
|
Needed for legacy compatability. |
promises: Promise[]
|
parseXMLAttrs()
|
The parseXMLAttrs function takes an XML DOM attributes object and adds the given attributes to the _target associative array. This function also parses the legacyOptions. N.B. This is only used for legacy widgets. WebComponents use transformAttributes() and do their own handling of attributes. |
_attrsObj: , _target: object, _proto: et2_widget
|
reposition()
|
Instructs the dropdown menu to reposition. Useful when the position or size of the trigger changes when the menu is activated. | - |
set_label()
|
NOT the setter, since we cannot add to the DOM before connectedCallback() TODO: This is not best practice. Should just set property, DOM modification should be done in render https://lit-element.polymer-project.org/guide/templates#design-a-performant-template |
value: string
|
setArrayMgr()
|
Sets the array manager for the given part |
_part: string, _mgr: object
|
setArrayMgrs()
|
Sets all array manager objects - this function can be used to set the root array managers of the container object. |
_mgrs: object
|
setInstanceManager()
|
Set the instance manager Normally this is not needed as it’s set on the top-level container, and we just return that reference |
manager: etemplate2
|
show()
|
Shows the dropdown panel. | - |
_handleClick()
|
Click handler calling custom handler set via onclick attribute to this.onclick |
_ev: MouseEvent
|
_set_label()
|
Do some fancy stuff on the label, splitting it up if there’s a %s in it Normally called from updated(), the “normal” setter stuff has already been run before this is called. We only override our special cases (%s) because the normal label has been set by the parent |
value: string
|
destroy()
|
et2_widget compatability
true |
- |
set_class()
|
Set the widget class
Use this.class or this.classList instead |
new_class: string
|
set_disabled()
|
Wrapper on this.disabled because legacy had it.
Use widget.disabled for visually disabled, widget.hidden for visually hidden. Widgets that are hidden from the server via attribute or $readonlys will not be created. Widgets that are disabled from the server will not return a value to the application code. |
value: boolean
|
set_statustext()
|
supports legacy set_statustext
use this.statustext |
value: string
|
Learn more about methods.