JS Web APILesson 36Free preview

JS Window API

This lesson is part of JavaScript · All levels

Summary

The window object represents the window where all JavaScript code in the browser is running, so the global variable is essentially a window property. Windows provides many APIs such as alert, confirm, prompt, location for navigation, as well as innerWidth and innerHeight to determine screen size. Most methods in the window are blocking, so overuse can interfere with the user experience.

Key points

Window is a global object; window.x is equal to the global variable x
Alert(), confirm(), and prompt() displayed blocking dialogs
Location.href moved the page, location.reload() reloaded
InnerWidth, innerHeight, open(), and close() manage the browser window

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.