text: HTMLWidgets.widget({
    name: "show_slice_2d",
    type: "output",
  
    factory: function (el, width, height) {
      let slice = new show_slice_2d.DisplaySlice2d(el, width, height);
      return {
        renderValue: function (x) {
          slice.renderValue(x);
        },
        resize: function (width, height) {
          slice.resize(width, height);
        },
        s: slice,
      };
    },
  });
  