Here's one I made, it's called Plastic: https://will-stone.github.io/plastic/

Thanks for your answer. I've researched a lot of solutions and find css-in-js a bit messy. For one, you're having to put properties in quotes. It's just not CSS. Also, the elegance with VueJS's solution allows for SCSS or LESS, for example, whilst keeping everything in a single file. I'm just wondering if anyone has heard of my type of example file being attempted? If not, I'll try to pull apart the Vue loader and give it a shot myself.