These actions reposition Calculator window. This is correct as long as no wild CSS rules are involved. // Send mouse down, move, and up actions combination to perform a drag and drop // action on the app title bar. The coordinates don't seem to change when moving the mouse, they are just recorded when you click the button. The very simplest approach was already posted here. Maybe I'm using it wrong, but it only shows the coordinates when I click the extension icon - which means it always just shows the coordinates of where the extension button is. (from MDN) The amount of scrolling that has been done of the viewport area (orĪny other scrollable element) is taken into account when computing the This includes scrolling, so stuff like scrollTop is not needed: The HTMLElement.getBoundingClientRect method is designed to to handle actual screen position of any element. Absolute : Displays coordinates relative to the current UCS. This option is available only when you are specifying multiple points, distances or angles. The menu options are: Relative : Displays coordinates relative to the point you most recently specified. I'm not sure what's the point of all these answers that loop through parent elements and do all kinds of weird stuff. When I click the mouse on the screen, the x y coordinates follow the cursor around on the screen. Find Right-click the button to chose the type of coordinates to display. function relMouseCoords(event)%)` Ĭanvas deliberately has differnt CSS size vs drawingbuffer size TOGGLE MOUSE COORDINATES CODEThis code works perfectly for me, tested in Firefox and Safari but should work for all. To account for this you need to loop through the chain of offsetParents, beginning with the canvas element itself. It will return the number of pixels it is offset relative to its offsetParent element, which can be something like a div element containing the canvas with a position: relative style applied. Since the canvas isn't always styled relative to the entire page, the canvas.offsetLeft/Top doesn't always return what you need. The top left corner of the screen is (0, 0) i,e, X and Y coordinate is (0, 0). TOGGLE MOUSE COORDINATES UPDATEUpdate (5/5/16): patriques' answer should be used instead, as it's both simpler and more reliable.
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