In my experience, though, as long as you're using this hook on smaller components that don't have a big DOM impact, you should be just fine. Use this hook in the small “leaf node” components near the bottom of the tree.įor maximum performance, you can use a library like React Spring or Framer Motion, which will allow you to update values without triggering React renders. It shouldn't be used in a top-level component like App or Homepage, since that will cause a huge chunk of your React tree to re-render very often. That said, you do still need to be a bit careful where you use this hook. No matter how hard I tried, I couldn't come up with a contrived scenario where the throttle actually improved performance (while still updating often enough for smooth animations). When the display mode is set, the event queue will start receiving mouse events. The MouseEvent Object The MouseEvent Object handles events that occur when the mouse interacts with the HTML document. In testing, though, it seemed to make performance worse. So youll get the event object from the mouse double click event, transform that into window coordinates and convert those into page coordinates. var element document.
#JAVASCRIPT EVENT MOUSE COORDINATES HOW TO#
evt is an event object equivalent to window.event evt.clientX and evt.clientY giv. In this article, we would like to show you how to get mouse X and Y positions using JavaScript.
Originally, this hook included “throttle” functionality, which would limit the updates to a user-specified interval. Report the mouse position on a canvas when the mouse is clicked.
This can be dozens and dozens of times a second.
This component will re-render whenever the user moves the mouse.
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