in src/axisHelper.ts [210:219]
function fixCategoryThickness(categoryThickness: number, isScalar: boolean, dataDomain: number[], scaleDomain: number[]) {
if (categoryThickness && isScalar && dataDomain && dataDomain.length === 2) {
let oldSpan: number = dataDomain[1] - dataDomain[0];
let newSpan: number = scaleDomain[1] - scaleDomain[0];
if (oldSpan > 0 && newSpan > 0) {
categoryThickness = categoryThickness * oldSpan / newSpan;
}
}
return categoryThickness;
}