Version 21.1.0

• Added x, y, pageX, pageY, offsetX, and offsetY to MouseEvent. (jenseng, ViniciusFXavier)
• Added support for unset with getComputedStyle(). (jsnajdr)
• Added the submitter property to SubmitEvent. (jenseng)
• Fixed MouseEvent's screenX and screenY to no longer coerce to integers, allowing fractional values. (jenseng)
• Fixed formEl.submit() to not longer fire submit events. (jenseng)
• Fixed stylesheets to no longer affect the document after their corresponding <link> is removed. (jsnajdr)
• Fixed pointer-events to inherit when used with getComputedStyle(). (jsnajdr)
• Fixed <script> elements with no src="" to no longer fire load events. (t1ger2080)
• Improved getComputedStyle() to cache its results, which should make it much faster. (jsnajdr)