In CSS, the properties are sorta like function parameters. They're the inputs used by layout algorithms and other complex internal mechanisms. A few years back, I decided to take the time to learn how CSS really works. I went down MDN rabbit holes, occasionally drilling down all the way ...
CSS.registerProperty({ name: "--shadow-colors", syntax: "<color>+", initialValue: "black", inherits: false }); You can also use @property in your stylesheet to register properties. You can read a brief explanation on MDN. Applying this to border-image Our worklet is now registered with...