They're not really a hack since javascript does support custom attributes. Jsx is not supported out of the box by javascript and jsx extends the syntax, so what

They're not really a hack since javascript does support custom attributes. Jsx is not supported out of the box by javascript and jsx extends the syntax, so what does actually feel more of a hack? ```const element = <h1>Hello, world!</h1>;``` How is this less of a hack compared to vue's attributes?