Element

A property of type KontrastElement is used to assign HTML elements within the current HTML page to figures and sliders.

Assignment

• You can assign a HTML element directly (for example, by calling getElementById('elementName')).

• You can also assign a string. In this case, the HTML element with the requested ID attribute is used. An error is thrown in case the element does not exist.

Interface

Functions

• assign(value: HTMLElement | string)
  Assign a new element. If value is a string, the HTML element with the corresponding ID is looked up automatically.
• addEventListener(eventName: string, callback: function)
  Registers the callback function as an event listener for the specified event name.
• clearEventListener(eventName: string)
  Remove all event listener callbacks associated with the event name.

Properties

• type: string

  The read-only string 'KontrastElement'.

• value: HTMLElement

  The current value. If the element has not been assigned yet, this returns undefined instead.

Events

• change, callback: function () { … }
  Event that fires whenever the value is changed.