function normalizeLinearDomain()

in src/axisHelper.ts [693:714]

• 16 lines of code
• 8 McCabe index (conditional complexity)

function normalizeLinearDomain(domain: NumberRange): NumberRange {
    if (isNaN(domain.min) || isNaN(domain.max)) {
        domain.min = emptyDomain[0];
        domain.max = emptyDomain[1];
    }
    else if (domain.min === domain.max) {
        // d3 linear scale will give zero tickValues if max === min, so extend a little
        domain.min = domain.min < 0 ? domain.min * 1.2 : domain.min * 0.8;
        domain.max = domain.max < 0 ? domain.max * 0.8 : domain.max * 1.2;
    }
    else {
        // Check that min is very small and is a negligable portion of the whole domain.
        // (fix floating pt precision bugs)
        // sometimes highlight value math causes small negative numbers which makes the axis add
        // a large tick interval instead of just rendering at zero.
        if (Math.abs(domain.min) < 0.0001 && domain.min / (domain.max - domain.min) < 0.0001) {
            domain.min = 0;
        }
    }

    return domain;
}