fuc-new/doc/node_modules/@vuepress/plugin-nprogress/lib/client/nprogress.js

/**
 * NProgress, (c) 2013, 2014 Rico Sta. Cruz - http://ricostacruz.com/nprogress
 * @license MIT
 */
import { isDef } from '@vuepress/helper/client';
// Forked and modified from nprogress v0.2.0
const addClass = (element, name) => {
    element.classList.add(name);
};
const removeClass = (element, name) => {
    element.classList.remove(name);
};
const removeElement = (element) => {
    element?.parentNode?.removeChild(element);
};
const clamp = (n, min, max) => {
    if (n < min)
        return min;
    if (n > max)
        return max;
    return n;
};
const toBarPercent = (n) => (-1 + n) * 100;
const queue = (() => {
    const pending = [];
    const nextStep = () => {
        const fn = pending.shift();
        if (fn) {
            fn(nextStep);
        }
    };
    return (fn) => {
        pending.push(fn);
        if (pending.length === 1)
            nextStep();
    };
})();
const camelCase = (content) => content
    .replace(/^-ms-/, 'ms-')
    .replace(/-([\da-z])/gi, (_, letter) => letter.toUpperCase());
const addStyle = (() => {
    const cssPrefixes = ['Webkit', 'O', 'Moz', 'ms'];
    const cssProps = {};
    const getVendorProp = (name) => {
        const { style } = document.body;
        if (name in style)
            return name;
        const capName = name.charAt(0).toUpperCase() + name.slice(1);
        let index = cssPrefixes.length;
        while (index--) {
            const vendorName = `${cssPrefixes[index]}${capName}`;
            if (vendorName in style)
                return vendorName;
        }
        return name;
    };
    const getStyleProp = (name) => {
        const finalizedName = camelCase(name);
        // eslint-disable-next-line no-return-assign
        return (cssProps[finalizedName] ??= getVendorProp(finalizedName));
    };
    const applyCss = (element, prop, value) => {
        element.style[getStyleProp(prop)] = value;
    };
    return (element, properties) => {
        for (const prop in properties) {
            const value = properties[prop];
            if (Object.hasOwn(properties, prop) && isDef(value))
                applyCss(element, prop, value);
        }
    };
})();
const SETTINGS = {
    minimum: 0.08,
    easing: 'ease',
    speed: 200,
    trickle: true,
    trickleRate: 0.02,
    trickleSpeed: 800,
    barSelector: '[role="bar"]',
    parent: 'body',
    template: '<div class="bar" role="bar"></div>',
};
export const nprogress = {
    percent: null,
    isRendered: () => Boolean(document.getElementById('nprogress')),
    set: (progress) => {
        const { speed, easing } = SETTINGS;
        const inProgress = nprogress.isStarted();
        const newPercent = clamp(progress, SETTINGS.minimum, 1);
        nprogress.percent = newPercent === 1 ? null : newPercent;
        const nprogressElement = nprogress.render(!inProgress);
        const barElement = nprogressElement.querySelector(SETTINGS.barSelector);
        // eslint-disable-next-line @typescript-eslint/no-unused-expressions
        nprogressElement.offsetWidth; /* Repaint */
        queue((next) => {
            // Add transition
            addStyle(barElement, {
                transform: `translate3d(${toBarPercent(newPercent)}%,0,0)`,
                transition: `all ${speed}ms ${easing}`,
            });
            if (newPercent === 1) {
                // Fade out
                addStyle(nprogressElement, {
                    transition: 'none',
                    opacity: '1',
                });
                // eslint-disable-next-line @typescript-eslint/no-unused-expressions
                nprogressElement.offsetWidth; /* Repaint */
                setTimeout(() => {
                    addStyle(nprogressElement, {
                        transition: `all ${speed}ms linear`,
                        opacity: '0',
                    });
                    setTimeout(() => {
                        nprogress.remove();
                        next();
                    }, speed);
                }, speed);
            }
            else {
                setTimeout(() => {
                    next();
                }, speed);
            }
        });
        return nprogress;
    },
    isStarted: () => typeof nprogress.percent === 'number',
    start: () => {
        if (!nprogress.percent)
            nprogress.set(0);
        const work = () => {
            setTimeout(() => {
                if (!nprogress.percent)
                    return;
                nprogress.trickle();
                work();
            }, SETTINGS.trickleSpeed);
        };
        if (SETTINGS.trickle)
            work();
        return nprogress;
    },
    done: (force) => {
        if (!force && !nprogress.percent)
            return nprogress;
        return nprogress.increase(0.3 + 0.5 * Math.random()).set(1);
    },
    increase: (amount) => {
        let { percent } = nprogress;
        if (!percent) {
            return nprogress.start();
        }
        percent = clamp(percent +
            (typeof amount === 'number'
                ? amount
                : (1 - percent) * clamp(Math.random() * percent, 0.1, 0.95)), 0, 0.994);
        return nprogress.set(percent);
    },
    trickle: () => nprogress.increase(Math.random() * SETTINGS.trickleRate),
    render: (fromStart) => {
        if (nprogress.isRendered()) {
            return document.getElementById('nprogress');
        }
        addClass(document.documentElement, 'nprogress-busy');
        const nprogressElement = document.createElement('div');
        nprogressElement.id = 'nprogress';
        nprogressElement.innerHTML = SETTINGS.template;
        const barElement = nprogressElement.querySelector(SETTINGS.barSelector);
        const parentElement = document.querySelector(SETTINGS.parent);
        const percent = fromStart ? '-100' : toBarPercent(nprogress.percent ?? 0);
        addStyle(barElement, {
            transition: 'all 0 linear',
            transform: `translate3d(${percent}%,0,0)`,
        });
        if (parentElement) {
            if (parentElement !== document.body) {
                addClass(parentElement, 'nprogress-custom-parent');
            }
            parentElement.appendChild(nprogressElement);
        }
        return nprogressElement;
    },
    remove: () => {
        removeClass(document.documentElement, 'nprogress-busy');
        removeClass(document.querySelector(SETTINGS.parent), 'nprogress-custom-parent');
        removeElement(document.getElementById('nprogress'));
    },
};