BOM

(Browser Object Model)

Main parts of browser:

  • DOM
  • BOM
  • Global scope

window.navigator

The window.navigator read-only property returns a reference to the Navigator object, which can be queried for information about the application running the script.

Browser detection

window.screen

Returns a reference to the screen object associated with the window. The screen object is a special object for inspecting properties of the screen on which the current window is being rendered.

Detect screen resolution

window.location

The window.location read-only property returns a Location object with information about the current location of the document.

See current url

window.history

The window.history read-only property returns a reference to the History object, which provides an interface for manipulating the browser session history (pages visited in the tab or frame that the current page is loaded in).

Default dialog methods

  • Alert

The window.alert() method displays an alert dialog with the optional specified content and an OK button.

  • Confirm

The window.confirm(message) method displays a modal dialog with an optional message and two buttons, OK and Cancel.

  • Prompt

The window.prompt(text, value) displays a dialog with an optional message prompting the user to input some text.

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