Dropdown Menu

DropdownMenu component allows you to create the component in the form of a drop-down list and manage its operation.

Table of Contents

  1. Default selectors
  2. Manual constructor
  3. HTML Examples
  4. Options
  5. Methods

Default selector

In default all select elements are changed to DropdownMenu. Additionally elements with data-native-menu=false will use custom popups for option selection

Manual constructor

For manual creation of DropdownMenu component you can use constructor of component.

<select id="dropdownmenu" data-native-menu="false">
   <option value="1">Item1</option>
   <option value="2">Item2</option>
   <option value="3">Item3</option>
   <option value="4">Item4</option>
</select>
<script>
   var element = document.getElementById("dropdownmenu"),
       widget = tau.widget.DropdownMenu(element);
</script>

HTML Examples

Basic

<select data-native-menu="false">
   <option value="1">Item1</option>
   <option value="2">Item2</option>
   <option value="3">Item3</option>
   <option value="4">Item4</option>
</select>

Inline type

When data-inline attribute is set to true, width of the DropdownMenu is determined by its text.

<select id="dropdownmenu" data-native-menu="false" data-inline="true">
   <option value="1">Item1</option>
   <option value="2">Item2</option>
   <option value="3">Item3</option>
   <option value="4">Item4</option>
</select>

With Placeholder

If you use <option> with data-placeholder="true" attribute, you can make a default placeholder. 

<select id="dropdownmenu" data-native-menu="false" data-hide-placeholder-menu-items="false">
   <option value="choose-one" data-placeholder="true">Choose an option</option>
   <option value="1">Item1</option>
   <option value="2">Item2</option>
   <option value="3">Item3</option>
   <option value="4">Item4</option>
</select>

Options

Option Input type Default value Description
data-hide-placeholder-menu-items boolean true Hide/Reveal the placeholder option in dropdown list of the DropdownMenu.
data-inline boolean false Sets the DropdownMenu component as inline/normal type.
data-native-menu boolean true Sets the DropdownMenu component as native/custom type.

Methods

To call method on DropdownMenu, you can refer following:

var element = document.getElementById("dropdownmenu"),
    widget = tau.widget.DropdownMenu(element);

widget.methodName(methodArgument1, methodArgument2, ...);

Summary

Method Description 
open()

Open DropdownMenu

 
close()

Close DropdownMenu

 
enable()

Enable DropdownMenu

 
disable()

Disable DropdownMenu
open

Open DropdownMenu

open()

Return value:

No Return Value

Code example:

 
<select id="dropdownmenu" data-native-menu="false">
   <option value="1">Item1</option>
   <option value="2">Item2</option>
   <option value="3">Item3</option>
   <option value="4">Item4</option>
</select>
<script>
   var elDropdownMenu = document.getElementById("dropdownmenu"),
       widget = tau.widget.DropdownMenu(elDropdownMenu);

   widget.open();
</script>
close

Close DropdownMenu

close()

Return value:

No Return Value

Code example:

 
<select id="dropdownmenu" data-native-menu="false">
   <option value="1">Item1</option>
   <option value="2">Item2</option>
   <option value="3">Item3</option>
   <option value="4">Item4</option>
</select>
<script>
   var elDropdownMenu = document.getElementById("dropdownmenu"),
       widget = tau.widget.DropdownMenu(elDropdownMenu);

   widget.close();
</script>
enable

Enable DropdownMenu

enable()

The method sets the disabled attribute for the dropdownmenu component and adds classes related to the disabled state.

Return value:

Type Description
DropdownMenu Returns DropdownMenu.

Code example:

 
<select id="dropdownmenu" data-native-menu="false">
   <option value="1">Item1</option>
   <option value="2">Item2</option>
   <option value="3">Item3</option>
   <option value="4">Item4</option>
</select>
<script>
   var elDropdownMenu = document.getElementById("dropdownmenu"),
       widget = tau.widget.DropdownMenu(elDropdownMenu);

   widget.enable();
</script>
disable

Disable DropdownMenu

disable()

The method sets the disabled attribute for the dropdownmenu component and adds classes related to the disabled state.

Return value:

Type Description
DropdownMenu Returns DropdownMenu.

Code example:

 
<select id="dropdownmenu" data-native-menu="false">
   <option value="1">Item1</option>
   <option value="2">Item2</option>
   <option value="3">Item3</option>
   <option value="4">Item4</option>
</select>
<script>
   var elDropdownMenu = document.getElementById("dropdownmenu"),
       widget = tau.widget.DropdownMenu(elDropdownMenu);

   widget.disable();
</script>