react-native-chart-kit/dist/v2/core/scales/time.js

Beautiful React Native charts for dashboards, reports, and data-rich mobile apps.

import { resolveTimeDomain } from "./domain";
export const createTimeScale = ({ domain = "auto", values = [], range }) => {
    const resolvedDomain = resolveTimeDomain(values, domain);
    const domainMin = resolvedDomain[0].valueOf();
    const domainSpan = resolvedDomain[1].valueOf() - domainMin;
    const rangeSpan = range[1] - range[0];
    return {
        domain: resolvedDomain,
        range,
        scale: (value) => {
            if (domainSpan === 0) {
                return range[0];
            }
            return (range[0] + ((value.valueOf() - domainMin) / domainSpan) * rangeSpan);
        },
        invert: (value) => {
            if (rangeSpan === 0) {
                return new Date(domainMin);
            }
            return new Date(domainMin + ((value - range[0]) / rangeSpan) * domainSpan);
        }
    };
};