Dialogs are full screen overlays that cover the currently visible window area using a semi-opague backdrop and a prominently placed dialog window in the foreground. They shift the attention away from the original content towards the dialog and usually contain additional details and/or dedicated form inputs.


The lazy initialization is performed upon the first invocation from the callee, using the magic _dialogSetup() method to retrieve the basic configuration for the dialog construction and any event callbacks.

// App/Foo.js
define(["Ui/Dialog"], function(UiDialog) {
  "use strict";

  function Foo() {};
  Foo.prototype = {
    bar: function() {
      // this will issue an ajax request with the parameter `value` set to `1`;

    _dialogSetup: function() {
      return {
        id: "myDialog",
        source: "<p>Hello World!</p>",
        options: {
          onClose: function() {
            // the fancy dialog was closed!

  return Foo;

id: string

The id is used to identify a dialog on runtime, but is also part of the first- time setup when the dialog has not been opened before. If source is undefined, the module attempts to construct the dialog using an element with the same id.

source: any

There are six different types of value that source does allow and each of them changes how the initial dialog is constructed:

  1. undefined
    The dialog exists already and the value of id should be used to identify the element.
  2. null
    The HTML is provided using the second argument of .open().
  3. () => void
    If the source is a function, it is executed and is expected to start the dialog initialization itself.
  4. Object
    Plain objects are interpreted as parameters for an Ajax request, in particular will be used to issue the request. It is possible to specify the key source.after as a callback (content: Element, responseData: Object) => void that is executed after the dialog was opened.
  5. string
    The string is expected to be plain HTML that should be used to construct the dialog.
  6. DocumentFragment
    A new container <div> with the provided id is created and the contents of the DocumentFragment is appended to it. This container is then used for the dialog.

options: Object

All configuration options and callbacks are handled through this object.

options.backdropCloseOnClick: boolean

Defaults to true.

Clicks on the dialog backdrop will close the top-most dialog. This option will be force-disabled if the option closeable is set to false.

options.closable: boolean

Defaults to true.

Enables the close button in the dialog title, when disabled the dialog can be closed through the .close() API call only.

options.closeButtonLabel: string

Defaults to Language.get("").

The phrase that is displayed in the tooltip for the close button.

options.closeConfirmMessage: string

Defaults to "".

Shows a confirmation dialog using the configured message before closing the dialog. The dialog will not be closed if the dialog is rejected by the user.

options.title: string

Defaults to "".

The phrase that is displayed in the dialog title.

options.onBeforeClose: (id: string) => void

Defaults to null.

The callback is executed when the user clicks on the close button or, if enabled, on the backdrop. The callback is responsible to close the dialog by itself, the default close behavior is automatically prevented.

options.onClose: (id: string) => void

Defaults to null.

The callback is notified once the dialog is about to be closed, but is still visible at this point. It is not possible to abort the close operation at this point.

options.onShow: (content: Element) => void

Defaults to null.

Receives the dialog content element as its only argument, allowing the callback to modify the DOM or to register event listeners before the dialog is presented to the user. The dialog is already visible at call time, but the dialog has not been finalized yet.

setTitle(id: string | Object, title: string)

Sets the title of a dialog.

setCallback(id: string | Object, key: string, value: (data: any) => void | null)

Sets a callback function after the dialog initialization, the special value null will remove a previously set callback. Valid values for key are onBeforeClose, onClose and onShow.

rebuild(id: string | Object)

Rebuilds a dialog by performing various calculations on the maximum dialog height in regards to the overflow handling and adjustments for embedded forms. This method is automatically invoked whenever a dialog is shown, after invoking the options.onShow callback.

close(id: string | Object)

Closes an open dialog, this will neither trigger a confirmation dialog, nor does it invoke the options.onBeforeClose callback. The options.onClose callback will always be invoked, but it cannot abort the close operation.

getDialog(id: string | Object): Object

This method returns an internal data object by reference, any modifications made do have an effect on the dialogs behavior and in particular no validation is performed on the modification. It is strongly recommended to use the .set*() methods only.

Returns the internal dialog data that is attached to a dialog. The most important key is .content which holds a reference to the dialog’s inner content element.

isOpen(id: string | Object): boolean

Returns true if the dialog exists and is open.