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The Web Performance API allows web pages access to certain functions for measuring the performance of web pages and web applications, including the
Navigation Timing API and high-resolution time data.
Returns the personalbar object, whose visibility can be toggled in the window.
Returns the scrollbars object, whose visibility can be checked.
Returns the maximum number of pixels that the document can be scrolled vertically.
Sets the text in the status bar at the bottom of the browser or returns the previously set text.
Returns the statusbar object, whose visibility can be toggled in the window.
Returns the toolbar object, whose visibility can be toggled in the window.
The window property of a window object points to the window object itself. Thus the following expressions all return the same window object:
The
focused read-only property of the
WindowClient interface is a
Boolean that indicates whether the current client has focus.
The
Window.onrejectionhandled property is an event handler for processing
rejectionhandled events, which are raised when
Promises are rejected.
The
Window.onunhandledrejection property is an event handler for processing
unhandledrejection events, which are raised for unhandled
Promise rejections.
Repeatedly calls a function or executes a code snippet, with a fixed time delay between each call. Returns an intervalID.
Sets a timer which executes a function or specified piece of code once after the timer expires.
The
CallEvent interface of the
Web Telephony API represents events related to telephone calls.