I want an easy way to revert an element to its original display setting

If you are building toggles (or similar interfaces) you often need to make adjustments to an element’s display property. Often this requires tracking the element’s initial CSS display value before setting it to "none" so you can switch it back later. It would be nice to have a mechanism by which you could reset an element’s display property (and potentially other properties) without having to know what the original setting was.