" },
            { baseWeight: 550,  lighter: "400", bolder: "900" },
            { baseWeight: 749,  lighter: "400", bolder: "900" },
            { baseWeight: 750,  lighter: "700", bolder: "900" },
            { baseWeight: 899,  lighter: "700", bolder: "900" },
            { baseWeight: 900,  lighter: "700", bolder: "900" },
            { baseWeight: 901,  lighter: "700", bolder: "901" },
        ];

        var testcases = document.getElementById("testcases");
        var testcase_template = testcases.f