![]() This CSS function is interesting, and you can read more in the spec, but the short of it is that it creates a visual depth for the user. The perspective() transform function specifies a perspective projection matrix. This effect uses the CSS transform property with the perspective, rotateX and rotateY transform functions. We can see the box in the center rotates towards the mouse on the screen. The code above is just calculating the number of degrees to rotate an object based on the X and Y position of the mouse and the position and size of an element (relative to the viewport) causing it to “face” or “follow” the mouse position.įollow Mouse Example by Armando Canals ( CodePen. RotateY = mouseX - element.x - (element.width / 2) RotateX = -(mouseY - element.y - (element.height / 2)) Looking at the code revealed it was is just some very basic math used to calculate the rotation of an object relative to the mouse position. I was inspired to write this post because I saw a cool animation somewhere and wanted to know how it worked. CSS Transform: Rotating a 3D object with perspective based on mouse position ![]()
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