![]() ![]() Note: An alias of screenX was implemented across modern browsers in more recent times Window.screenLeft. The Touch. Thus we can see that when the browser does not have a scrollbar (the Visual window is coincident with the document window), Pagex is equal to Clientx, Pagex is equal to Clienty, if a drop-down scroll bar appears and the scroll bar is pulled down, the document window scrolls up, If there is a left and right scroll bar and the scroll bar is pulled to the left, the document window scrolls to the scroll, Pagex>=clientx, pagey>=clienty, x = ClientX, y = ClientY in the case of the document window scrolling. The Window.screenX read-only property returns the horizontal distance, in CSS pixels, of the left border of the user's browser viewport to the left side of the screen. The Touch.screenX property is the horizontal (x) coordinate of a touch point relative to the screen in CSS pixels. The position of the upper-left corner of the visible window is unchanged, but the position of the upper-left corner of the document window changes, such as: Such as.Īt this point the Visual window overlaps the document window, Pagex equals Clientx, Pagey equals clienty, if we narrow the browser window until the browser appears scroll bar. PageX, Pagey is relative to the upper-left corner of the document window, x, Y and Clientx, clienty the same, whose value is relative to the upper-left corner of the viewable window (the viewable area of the view). Such as: The outermost is a green border div, inside a layer is a red border div, the innermost is a blue border div, click on the Blue Div, The Layerx of the event is the distance from the layery relative to the outermost green outer edge (the position of the middle Red Div is set to absolute or relative, all of which are not relative to the element, and vice versa). Generally, the differences are: page x/y: the x or y coordinate as relative the to the fully rendered page (i.e., it considers the entire height and width of the page/document, not just what is currently being shown on screen) screen x/y: the x or y coordinate as relative to the physical screen. Versions prior to IE8 and IE8 have no layerx or layery values. Layerx Layery is the distance from the outer edge of the parent element of position to absolute or relative. In Chrome Opera, Safari refers to the outer edge, that is, the width of the border of the element, Firefox IE does not include the border value. In different browsers, however, their values differ. ![]() If you need the position of the mouse pointer relative to the top-left corner of the browser window's client area, use the clientX and clientY properties. To get the y-coordinate of the mouse, use the pageY property. changedTouches: A list of touch points involved in this event. property (event) Retrieves the x-coordinate of the mouse pointer relative to the top-left corner of the document. Where OffsetX, offsety is the offset relative to the upper-left corner of the triggering event element. Lets rewind now back to the Event object and talk a bit more about the Touches, changedTouches, and targetTouches properties, to help more clearly explain their differences: Touches: A list of all touch points currently making contact with the touch surface. On the other hand clientX and clientY define the mouse coordinates in relation to the visual viewport.Several properties in the JavaScript event object about the location of the event mouse (x, PageX, OffsetX, Scrrenx ClientX) and (Y, Pagey, OffsetY, ScreenY, ClientY), PageX and clientX, these two are easier to confuse, PageX. On mobile browsers the pageX and pageY are still relative to the page in CSS pixels so you can obtain the mouse coordinates relative to the document page. The layout viewport is synonym for a full page rendered on a desktop browser (with all the elements that are not visible on the current viewport). The visual viewport is the part of the page that's currently shown onscreen. For a better understanding - on mobile browsers - we need to differentiate two new concept: the layout viewport and visual viewport. Regarding your last question if calculations are similar on desktop and mobile browsers. screenX/Y gives the coordinates relative to the screen in device pixels. The screenX property returns the x (horizontal) coordinate of a window, relative to the screen.clientX/Y gives the coordinates relative to the viewport in CSS pixels. The differences and the use case of these properties are described below: The screenX and screenY property: The screenX and screenY are read-only properties that provide horizontal and vertical coordinates respectively relative to the global, or screen coordinates.pageX/Y gives the coordinates relative to the element in CSS pixels.Document.addEventListener('DOMContentLoaded', _ => `) Ĭlick this paragraph, and an alert box will show the xĪnd y coordinates of the mouse relative to the viewport
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