-template-columns',
        from: "fit-content(10px) fit-content(20px)",
        to: "fit-content(20px) max-content"
      }, [
        {at: -1, expect: "fit-content(0px) fit-content(20px)"},
        {at: 0, expect: "fit-content(10px) fit-content(20px)"},
        {at: 0.4, expect: "fit-content(14px) fit-content(20px)"},
        {at: 0.6, expect: "fit-content(16px) max-content"},
        {at: 1, expect: "fit-content(20px) max-content"},
        {at: 2, expect: "fit-content(30px) max-content"}
      ]);

    