{"id":9352,"date":"2025-11-19T12:26:47","date_gmt":"2025-11-19T03:26:47","guid":{"rendered":"https:\/\/fastcoding.jp\/blog\/?p=9352"},"modified":"2025-11-19T12:26:54","modified_gmt":"2025-11-19T03:26:54","slug":"next-nuxt-image-optimization","status":"publish","type":"post","link":"https:\/\/fastcoding.jp\/blog\/all\/frontend\/next-nuxt-image-optimization\/","title":{"rendered":"\uff1c\u753b\u50cf\u8aad\u307f\u8fbc\u307f\u8ca0\u8377\u3092\u5fb9\u5e95\u7ba1\u7406\uff1eNext\/Nuxt Image\u306e\u6700\u9069\u5316"},"content":{"rendered":"
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\u30d6\u30ed\u30b0\u306e\u66f8\u304d\u51fa\u3057\u3092\u66f8\u304f\u306e\u3063\u3066\u672c\u5f53\u306b\u96e3\u3057\u3044\u306a\u3063\u3066\u601d\u3044\u307e\u3059\u3002\u3067\u3082\u5618\u306f\u66f8\u3044\u3066\u306a\u3044\u3067\u3059\u3088…\u672c\u5f53\u306b\u91cd\u305f\u3044\u30da\u30fc\u30b8\u3067\u3057\u305f\u3002<\/em><\/small><\/p>\n\n\n\n

Web\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u4e16\u754c\u3067\u306f\u3001\u3053\u306e\u300c\u30e1\u30a4\u30f3\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u8868\u793a\u3055\u308c\u308b\u307e\u3067\u306e\u6642\u9593\u300d\u3092LCP(Largest Contentful Paint)\u3068\u547c\u3073\u3001Google\u306e\u30b3\u30a2\u30a6\u30a7\u30d6\u30d0\u30a4\u30bf\u30eb\u306e\u91cd\u8981\u6307\u6a19\u306e\u4e00\u3064\u3068\u3057\u3066\u4f4d\u7f6e\u3065\u3051\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u7279\u306bEC\u3001\u4e0d\u52d5\u7523\u3001\u30e1\u30c7\u30a3\u30a2\u30b5\u30a4\u30c8\u306a\u3069\u3001\u753b\u50cf\u304c\u4e3b\u5f79\u306e\u30b5\u30a4\u30c8<\/strong>\u3067\u306f\u3001LCP\u306e\u5927\u534a\u304c\u753b\u50cf\u306e\u8aad\u307f\u8fbc\u307f\u6642\u9593\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u4eca\u56de\u306f\u3001Next.js\u3068Nuxt\u3068\u3044\u30462\u5927\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u753b\u50cf\u6700\u9069\u5316\u6a5f\u80fd\u3092\u4f7f\u3063\u3066\u3001LCP\u3092\u78ba\u5b9f\u306b\u77ed\u7e2e\u3057\u3001CLS\u3082\u6291\u5236\u3059\u308b\u5b9f\u88c5\u624b\u6cd5<\/strong>\u3092\u3001\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u8996\u70b9\u304b\u3089\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

\u753b\u50cf\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u73fe\u72b6\u3068\u8ab2\u984c<\/h2>\n\n\n\n

\u7279\u306bEC\u30b5\u30a4\u30c8\u3084\u4e0d\u52d5\u7523\u30dd\u30fc\u30bf\u30eb\u3001\u30e1\u30c7\u30a3\u30a2\u30b5\u30a4\u30c8\u3067\u306f\u3001\u5546\u54c1\u753b\u50cf\u3001\u7269\u4ef6\u5199\u771f\u3001\u8a18\u4e8b\u306e\u30a2\u30a4\u30ad\u30e3\u30c3\u30c1\u753b\u50cf<\/strong>\u304c\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u4e2d\u5fc3\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u753b\u50cf\u306e\u6271\u3044\u65b9\u6b21\u7b2c\u3067\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306f\u5927\u304d\u304f\u5909\u308f\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u591a\u304f\u306e\u30b5\u30a4\u30c8\u3067\u306f\uff08\u3044\u307e\u3060\u306b\u30fb\u30fb\u30fb\uff09\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5358\u7d14\u306a\u5b9f\u88c5\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n

\u60aa\u3044\u4f8b: \u5f93\u6765\u306e\uff08HTML\u305d\u306e\u307e\u307e\uff09\u5b9f\u88c5<\/strong><\/p>\n\n\n\n

<img src=\"\/images\/product-large.jpg\" alt=\"\u5546\u54c1\u753b\u50cf\" \/><\/code><\/pre>\n\n\n\n
\u5358\u306bimg\u30bf\u30b0\u3092\u66f8\u304f\u3060\u3051\u3067\u753b\u50cf\u304c\u51fa\u308b\u304b\u3089HTML\u306f\u3059\u3054\u3044\u3093\u3067\u3059\u304c\u3001\u3053\u306e\u5b9f\u88c5\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u554f\u984c\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001<\/p>\n\n\n\n
    \n
  • \u89e3\u50cf\u5ea6\u306e\u6700\u9069\u5316\u304c\u3055\u308c\u3066\u3044\u306a\u3044<\/strong>: \u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u3082\u30e2\u30d0\u30a4\u30eb\u3082\u540c\u3058\u5927\u304d\u306a\u753b\u50cf\u3092\u914d\u4fe1<\/li>\n\n\n\n
  • \u512a\u5148\u5ea6\u5236\u5fa1\u304c\u306a\u3044<\/strong>: \u3059\u3079\u3066\u306e\u753b\u50cf\u304c\u540c\u3058\u512a\u5148\u5ea6\u3067\u8aad\u307f\u8fbc\u307e\u308c\u308b<\/li>\n\n\n\n
  • \u30ec\u30a4\u30a2\u30a6\u30c8\u30b7\u30d5\u30c8\u304c\u767a\u751f<\/strong>: \u753b\u50cf\u304c\u8aad\u307f\u8fbc\u307e\u308c\u305f\u77ac\u9593\u306b\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u305a\u308c\u308b(CLS\u60aa\u5316)<\/li>\n\n\n\n
  • \u5e2f\u57df\u306e\u7121\u99c4\u9063\u3044<\/strong>: \u30e2\u30d0\u30a4\u30eb\u74b0\u5883\u3067\u4e0d\u5fc5\u8981\u306b\u5927\u304d\u306a\u753b\u50cf\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/li>\n<\/ul>\n\n\n\n
    \u5b9f\u969b\u306b\u79c1\u305f\u3061\u304c\u904b\u7528\u3092\u62c5\u5f53\u3057\u3066\u3044\u308b\u3068\u3042\u308bEC\u30b5\u30a4\u30c8\u3067\u306f\u3001\u5f53\u521d\u3001\u5546\u54c1\u4e00\u89a7\u30da\u30fc\u30b8\u306eLCP\u304c4.2\u79d2\u306b\u3082\u9054\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u306fGoogle\u306e\u63a8\u5968\u5024(2.5\u79d2\u4ee5\u4e0b)\u3092\u5927\u304d\u304f\u4e0a\u56de\u308b\u6570\u5024\u3067\u3059\u3002<\/p>\n\n\n\n
    Next.js\/Nuxt\u306e\u753b\u50cf\u6700\u9069\u5316\u6a5f\u80fd<\/h2>\n\n\n\n
    Next.js\u3068Nuxt\u306b\u306f\u3001\u305d\u308c\u305e\u308c\u5f37\u529b\u306a\u753b\u50cf\u6700\u9069\u5316\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306fsrcset\u3001fetchpriority\u3001\u5148\u8aad\u307f\u3001\u30a2\u30b9\u30da\u30af\u30c8\u6bd4\u5236\u5fa1<\/strong>\u3092\u81ea\u52d5\u7684\u306b\u3001\u3042\u308b\u3044\u306f\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
    Next.js Image\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u3088\u308b\u81ea\u52d5\u6700\u9069\u5316<\/h3>\n\n\n\n
    Next.js\u306e<Image><\/code>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u4f7f\u3048\u3070\u3001\u753b\u50cf\u3092\u3044\u308d\u3044\u308d\u3068\u81ea\u52d5\u7684\u306b\u6700\u9069\u5316\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
    \u826f\u3044\u4f8b: Next.js Image\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u57fa\u672c\u5b9f\u88c5<\/strong><\/p>\n\n\n
    \nimport Image from 'next\/image'\n\nexport default function ProductCard({ product }) {\n  return (\n    <div className="product-card">\n      <Image\n        src={product.imageUrl}\n        alt={product.name}\n        width={800}\n        height={600}\n        sizes="(max-width: 640px) 100vw, (max-width: 1024px) 50vw, 800px"\n        quality={85}\n      \/>\n    <\/div>\n  )\n}\n<\/pre><\/div>\n\n\n
    \u81ea\u52d5\u7684\u306b\u6700\u9069\u5316\u3055\u308c\u308b\u3053\u3068:<\/strong><\/p>\n\n\n\n
      \n
    • srcset\u306e\u81ea\u52d5\u751f\u6210<\/strong>: \u30c7\u30d0\u30a4\u30b9\u306b\u5fdc\u3058\u305f\u8907\u6570\u30b5\u30a4\u30ba\u306e\u753b\u50cf\u3092\u81ea\u52d5\u751f\u6210\uff08\u3053\u308c\u304c\u4e00\u756a\u4fbf\u5229\uff09<\/li>\n\n\n\n
    • WebP\/AVIF\u5909\u63db<\/strong>: \u30d6\u30e9\u30a6\u30b6\u30b5\u30dd\u30fc\u30c8\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u81ea\u52d5\u5909\u63db<\/li>\n\n\n\n
    • \u9045\u5ef6\u8aad\u307f\u8fbc\u307f<\/strong>: \u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u5916\u306e\u753b\u50cf\u306f\u9045\u5ef6\u8aad\u307f\u8fbc\u307f<\/li>\n\n\n\n
    • CLS\u9632\u6b62<\/strong>: width\/height\u306b\u3088\u308b\u9818\u57df\u78ba\u4fdd\u3067\u81ea\u52d5\u7684\u306bCLS\u6291\u5236<\/li>\n<\/ul>\n\n\n\n
      Next.js Image \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e fetchpriority \u3067 LCP \u6700\u9069\u5316<\/h4>\n\n\n\n
      \u81ea\u52d5\u7684\u306b\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u3055\u308c\u308b\u3068\u554f\u984c\u304c\u8d77\u304d\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u306d\u3002\u305f\u3068\u3048\u3070\u30da\u30fc\u30b8\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u3063\u3066\u3044\u305f\u308a\u3001\u30de\u30a6\u30b9\u306e\u30db\u30d0\u30fc\u3084\u30ad\u30fc\u64cd\u4f5c\u3067\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306a\u8981\u7d20\u3067\u3059\u3002\u3053\u3046\u3044\u3063\u305f\u8981\u7d20\u306b\u3064\u3044\u3066\u306fpriority<\/code>\u5c5e\u6027\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308afetchpriority=\"high\"<\/code>\u304c\u81ea\u52d5\u8a2d\u5b9a\u3055\u308c\u3001\u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u3082\u30b9\u30ad\u30c3\u30d7\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
      \u826f\u3044\u4f8b: LCP\u8981\u7d20\u3078\u306e priority \u6307\u5b9a<\/strong><\/p>\n\n\n
      \nimport Image from 'next\/image'\n\nexport default function Hero() {\n  return (\n    <div className="hero">\n      <Image\n        src="\/images\/hero.jpg"\n        alt="\u30e1\u30a4\u30f3\u30d3\u30b8\u30e5\u30a2\u30eb"\n        width={1920}\n        height={1080}\n        sizes="100vw"\n        priority  \/\/ \u2190 fetchpriority="high" & \u9045\u5ef6\u8aad\u307f\u8fbc\u307f\u7121\u52b9\u5316\n        quality={90}\n      \/>\n    <\/div>\n  )\n}\n<\/pre><\/div>\n\n\n
      \u305f\u3060\u3057\u3001\u904e\u5270\u306b\u3053\u308c\u3092\u4f7f\u3046\u306e\u306f\u7d50\u5c40\u610f\u5473\u304c\u306a\u304f\u306a\u308a\u307e\u3059\u306e\u3067\uff08\u753b\u50cf\u304c\u307e\u305f\u5373\u6642\u8aad\u307f\u8fbc\u307f\u306b\u306a\u308b\u3060\u3051\u306a\u306e\u3067\uff09\u753b\u50cf\u306e\u89e3\u50cf\u5ea6\u306b\u3082\u3088\u308a\u307e\u3059\u304c\u3001\uff11\u30da\u30fc\u30b8\u306b\u301c\uff13\u500b\u3050\u3089\u3044\u3001\u3068\u3044\u3046\u7a0b\u5ea6\u306e\u3001\u672c\u5f53\u306b\u300c\u512a\u5148\u300d\u3059\u308b\u753b\u50cf\u3068\u3057\u3066\u5b9a\u7fa9\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
      Next.js Image – preload \u3067\u306e\u5148\u8aad\u307f\u6700\u9069\u5316<\/h4>\n\n\n\n
      Next.js 15\u4ee5\u964d\u3067\u306f\u3001<link rel=\"preload\"><\/code>\u3082\u81ea\u52d5\u7684\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u3002\u3055\u3089\u306b\u7d30\u304b\u304f\u5236\u5fa1\u3057\u305f\u3044\u5834\u5408\u306f\u3001next\/head<\/code>\u3067\u660e\u793a\u7684\u306b\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
      \u826f\u3044\u4f8b: \u624b\u52d5preload\u8a2d\u5b9a(Next.js)<\/strong><\/p>\n\n\n
      \nimport Head from 'next\/head'\nimport Image from 'next\/image'\n\nexport default function ProductPage({ product }) {\n  return (\n    <>\n      <Head>\n        <link\n          rel="preload"\n          as="image"\n          href={product.heroImage}\n          imageSrcSet={`${product.heroImage}?w=640 640w, ${product.heroImage}?w=1200 1200w`}\n          imageSizes="100vw"\n        \/>\n      <\/Head>\n      <Image\n        src={product.heroImage}\n        alt={product.name}\n        width={1200}\n        height={800}\n        priority\n      \/>\n    <\/>\n  )\n}\n<\/pre><\/div>\n\n\n
      Nuxt Image \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u3088\u308b\u6700\u9069\u5316<\/h3>\n\n\n\n
      Nuxt\u3067\u306f@nuxt\/image<\/code>\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
      \u826f\u3044\u4f8b: Nuxt Image\u57fa\u672c\u5b9f\u88c5<\/strong><\/p>\n\n\n
      \n<template>\n  <div class="product-card">\n    <NuxtImg\n      :src="product.imageUrl"\n      :alt="product.name"\n      width="800"\n      height="600"\n      sizes="sm:100vw md:50vw lg:800px"\n      :quality="85"\n    \/>\n  <\/div>\n<\/template>\n\n<script setup>\nconst props = defineProps({\n  product: Object\n})\n<\/script>\n<\/pre><\/div>\n\n\n
      Nuxt\u7248 Image\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u7279\u5fb4:<\/strong><\/p>\n\n\n\n