@custom-media --one (width < 300px) {}

@custom-media --two (width <= 300px), (width=300px) {}

@custom-media --three (width = 300px) {}

@custom-media /* a comment */ --four (width > 300px) {}

@custom-media /* a comment */ --five /* a comment */ (width >= 300px) /* a comment */ {}

@custom-media /* a comment */ --six /* a comment */ (width >= 300px) /* a comment */, screen and (width = 400px) /* a comment */ {}
