> ## Documentation Index > Fetch the complete documentation index at: https://docs.newenergycoder.club/llms.txt > Use this file to discover all available pages before exploring further. # 推荐群聊 > NEC 推荐的机器人竞赛与硬件技术 QQ 交流群，扫码即可加入 export const LazyImages = () => { useEffect(() => { if (typeof document === "undefined") return; const applyLazy = root => { const scope = root || document; const images = scope.querySelectorAll ? scope.querySelectorAll("img") : []; images.forEach(img => { if (img.closest("#navbar, header, nav, [data-no-lazy]")) return; if (img.hasAttribute("loading")) return; if (!img.closest("main, article, #content-wrapper")) return; img.setAttribute("loading", "lazy"); img.setAttribute("decoding", "async"); if (!img.hasAttribute("alt")) img.setAttribute("alt", ""); }); }; applyLazy(document); const observer = new MutationObserver(mutations => { for (const m of mutations) { for (const node of m.addedNodes) { if (!(node instanceof Element)) continue; if (node.tagName === "IMG") { applyLazy(node.parentElement || document); } else if (node.querySelector) { applyLazy(node); } } } }); observer.observe(document.body, { childList: true, subtree: true }); return () => observer.disconnect(); }, []); return null; }; 除 NEC 自有社群外，这里汇总了社区成员常用的竞赛、硬件与技术交流 QQ 群，扫码或搜索群号即可加入。部分群名称在 QQ 中显示过长被截断（以 … 表示），请以**群号**为准搜索加入。 ## 社区官方群 NEC 新能源开发者社区 QQ 群二维码