glowdown/dist/glowdown.js

A library for applying grayscale filter on memorial days

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
    typeof define === 'function' && define.amd ? define(factory) :
    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Glowdown = factory());
})(this, (function () { 'use strict';

    class Glowdown {
        constructor(options = {}) {
            this.dates = [];
            this.options = options;
            if (options.dates) {
                this.dates = options.dates;
            }
        }
        async init() {
            if (this.options.dataUrl && !this.options.dates) {
                try {
                    // 兼容浏览器和Node.js环境，Node.js环境下可能需要全局fetch支持
                    let fetchFn;
                    if (typeof window !== 'undefined' && window.fetch) {
                        fetchFn = window.fetch.bind(window);
                    }
                    else if (typeof fetch !== 'undefined') {
                        fetchFn = fetch;
                    }
                    else {
                        // 如果Node.js环境没有fetch，提示用户安装node-fetch
                        throw new Error('Fetch API is not available. Please install "node-fetch" for Node.js environment.');
                    }
                    const response = await fetchFn(this.options.dataUrl);
                    this.dates = await response.json();
                }
                catch (err) {
                    console.error('Failed to load memorial dates:', err);
                }
            }
        }
        checkDate(date = new Date()) {
            const currentTime = date.getTime();
            return this.dates.some(({ start, end }) => {
                // 计算开始时间和结束时间的时间戳
                const startDate = new Date(start.y === -1 ? date.getFullYear() : start.y, start.m - 1, start.d, start.h, start.min).getTime();
                const endDate = new Date(end.y === -1 ? date.getFullYear() : end.y, end.m - 1, end.d, end.h, end.min).getTime();
                return currentTime >= startDate && currentTime <= endDate;
            });
        }
        applyStyle() {
            if (this.checkDate()) {
                if (this.options.onMemorialDay) {
                    this.options.onMemorialDay();
                }
            }
        }
    }

    return Glowdown;

}));