lazy loding

src/app/page.tsx

@@ -36,6 +36,17 @@ import LabelCard from "@components/CardYear";
 import ProjectsSection from "@components/ProjectsSection";
 import { motion } from "framer-motion";
 
+const VIDEOS = [
+  "/videos/features/virtual_tour.mp4",
+  "/videos/features/nks_infra.mp4",
+  "/videos/features/uralsky.mp4",
+  "/videos/features/parametric.mp4",
+  "/videos/features/render.mp4",
+  "/videos/features/wish.mp4",
+  "/videos/features/integra_crm.mp4",
+  "/videos/features/send.mp4",
+];
+
 function getSortedProjects(projects: IProject[]) {
   const sorted = [...projects].sort(
     (da, db) => getTime(db.releaseDate) - getTime(da.releaseDate)
@@ -87,7 +98,33 @@ export default function App() {
   const [setModal] = useModalStore((state) => [state.setModal]);
   const [isShownAllProjects, setIsShownAllProjects] = useState<boolean>(false);
   const [isBuffering, setIsBuffering] = useState(true);
-  const featureRef = useRef(null);
+  const [viewPortEntered, setViewPortEntered] = useState(false);
+  const featureRefDesktop = useRef<HTMLDivElement>(null);
+  const featureRefMobile = useRef<HTMLDivElement>(null);
+
+  const handleOnViewportFeatureEnter = () => {
+    if (viewPortEntered) return;
+
+    setViewPortEntered(true);
+
+    if (!featureRefDesktop.current || !featureRefMobile.current) return;
+    const videoDesktopRefs = featureRefDesktop.current.children;
+    const videoMobileRefs = featureRefMobile.current.children;
+
+    if (!videoDesktopRefs || !videoMobileRefs) return;
+
+    for (let i = 0; i < videoDesktopRefs.length; i++) {
+      const videoMobileEl = videoDesktopRefs[i] as HTMLVideoElement;
+      const videoDesktopEl = videoMobileRefs[i] as HTMLVideoElement;
+
+      if (videoMobileEl.dataset.src && videoDesktopEl.dataset.src) {
+        videoDesktopEl.src = videoDesktopEl.dataset.src;
+        videoMobileEl.src = videoMobileEl.dataset.src;
+      }
+    }
+
+    setViewPortEntered(true);
+  };
 
   async function getProjects() {
     try {
@@ -336,10 +373,8 @@ export default function App() {
 
           <motion.div
             className="xl:grid flex flex-col grid-cols-2 xl:gap-4 sm:gap-10 gap-8 2xl:mb-[200px] sm:mb-[120px] mb-20"
-            viewport={{ once: true, margin: "-10%" }}
-            onViewportEnter={() =>
-              console.log("first", featureRef.current.firstElementChild)
-            }
+            viewport={{ margin: "-10%" }}
+            onViewportEnter={handleOnViewportFeatureEnter}
           >
             <div className="flex flex-col gap-20">
               <div className="xl:flex flex-col grid sm:grid-cols-2 xl:gap-8 gap-3">
@@ -416,14 +451,13 @@ export default function App() {
                 /> */}
               </div>
             </div>
-            <div
-              className="aspect-video sticky top-[25%] xl:block hidden"
-              ref={featureRef}
-            >
-              <FeatureVideoViewBox video={selectedVideo} />
-            </div>
+            <FeatureVideoViewBox
+              selectedVideo={selectedVideo}
+              videos={VIDEOS}
+              featureRef={featureRefDesktop}
+            />
 
-            <VideoSliderMobile />
+            <VideoSliderMobile featureRef={featureRefMobile} />
           </motion.div>
 
           {/* <Histories /> */}

src/components/FeatureVideoViewBox.tsx

@@ -1,36 +1,65 @@
 import { useEffect, useRef } from "react";
 
 interface FeatureVideoViewBoxProps {
-  video: string;
+  selectedVideo: string;
+  videos: string[];
+  featureRef: React.LegacyRef<HTMLDivElement>;
 }
 
-function FeatureVideoViewBox({ video }: FeatureVideoViewBoxProps) {
+function FeatureVideoViewBox({
+  selectedVideo,
+  videos,
+  featureRef,
+}: FeatureVideoViewBoxProps) {
   //   const videoRef = useRef<HTMLVideoElement>(null);
   const videoContainerRef = useRef<HTMLDivElement>(null);
 
+  // useEffect(() => {
+  //   if (!selectedVideo || !videoContainerRef.current) return;
+
+  //   const videoEl = document.createElement("video");
+  //   videoEl.src = selectedVideo;
+  //   videoEl.muted = true;
+  //   videoEl.autoplay = true;
+  //   videoEl.loop = true;
+  //   videoEl.playsInline = true;
+  //   videoEl.preload = "metadata";
+  //   videoEl.classList.add("absolute", "h-fit");
+  //   // videoEl.onloadeddata = () => console.log("onloadeddata");
+
+  //   videoContainerRef.current.appendChild(videoEl);
+
+  //   if (videoContainerRef.current.childElementCount > 1) {
+  //     setTimeout(() => {
+  //       videoContainerRef.current?.firstElementChild?.remove();
+  //     }, 5000);
+  //   }
+  // }, [selectedVideo]);
+
   useEffect(() => {
-    if (!video || !videoContainerRef.current) return;
+    return () => {};
+  }, [selectedVideo]);
 
-    const videoEl = document.createElement("video");
-    videoEl.src = video;
-    videoEl.muted = true;
-    videoEl.autoplay = true;
-    videoEl.loop = true;
-    videoEl.playsInline = true;
-    videoEl.preload = "metadata";
-    videoEl.classList.add("absolute", "h-fit");
-    // videoEl.onloadeddata = () => console.log("onloadeddata");
-
-    videoContainerRef.current.appendChild(videoEl);
-
-    if (videoContainerRef.current.childElementCount > 1) {
-      setTimeout(() => {
-        videoContainerRef.current?.firstElementChild?.remove();
-      }, 5000);
-    }
-  }, [video]);
-
-  return <div ref={videoContainerRef} className="relative h-fit"></div>;
+  return (
+    <div className="aspect-video sticky top-[25%] xl:block hidden">
+      <div ref={featureRef} className="relative h-fit">
+        {videos.map((video) => (
+          <video
+            data-src={video}
+            key={video}
+            muted
+            autoPlay
+            loop
+            playsInline
+            preload="metadata"
+            className={`absolute h-fit ${
+              selectedVideo === video ? "block" : "hidden"
+            }`}
+          />
+        ))}
+      </div>
+    </div>
+  );
 }
 
 export default FeatureVideoViewBox;

src/components/VideoSliderMobile.tsx

@@ -6,7 +6,11 @@ import ArrowLeftIcon from "./icons/ArrowLeftIcon";
 import ArrowRightIcon from "./icons/ArrowRightIcon";
 import { useSwipeable } from "react-swipeable";
 
-function VideoSliderMobile() {
+interface IVideoSliderMobile {
+  featureRef: React.LegacyRef<HTMLDivElement>;
+}
+
+function VideoSliderMobile({ featureRef }: IVideoSliderMobile) {
   const [items] = useState<any[]>([
     {
       title: "Виртуальный тур по жилому комплексу",
@@ -102,7 +106,7 @@ function VideoSliderMobile() {
       className="xl:hidden flex flex-col sm:gap-6 gap-4 border-b border-[#3D425C] pb-5"
     >
       <div
-        // ref={videosContainerRef}
+        ref={featureRef}
         className={`relative flex sm:gap-[88px] items-start transition-all duration-500`}
         style={{ left: `-${activeIndex * 100}%` }}
       >
@@ -110,7 +114,7 @@ function VideoSliderMobile() {
           <motion.video
             key={index}
             ref={videoRefs[index]}
-            src={item.video}
+            data-src={item.video}
             muted
             loop
             playsInline