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æ ªåŒäŒç€ŸããããŠã¬ã®@YushiYamamotoã§ãïŒ
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åœããªãããReact.jsã»Next.jså°éã®ããªãŒã©ã³ã¹ãšã³ãžãã¢ãšããŠã掻åããŠããŸãâïž
2025幎ã®Webéçºã§ã¯ããŠãŒã¶ãŒäœéšãšããžãã¹ææãæå€§åããããã®ã¬ã³ããªã³ã°æŠç¥ãéåžžã«éèŠã«ãªã£ãŠããŸããç¹ã«Next.jsãæäŸãã倿§ãªã¬ã³ããªã³ã°ææ³ãæŠç¥çã«çµã¿åãããããšã§ããµã€ãã®ããã©ãŒãã³ã¹ãåçã«åäžãããããšãå¯èœã§ãã
ä»åã¯ãNext.js 14ã®ææ°ã¬ã³ããªã³ã°ææ³ãšClaude 3.7 AIãçµã¿åãããŠãECãµã€ãã®å£²äžã30%åäžãããå®è£ æ¹æ³ã«ã€ããŠè©³ãã解説ããŸããæè¡çãªå®è£ æé ã ãã§ãªããããžãã¹é¢ã§ã®å¹ææž¬å®æ¹æ³ãŸã§å«ããå æ¬çãªå 容ãšãªã£ãŠããŸãã®ã§ããšã³ãžãã¢ããããŒã±ã¿ãŒãŸã§å¹ åºãåèã«ããŠããã ããå 容ã§ãïŒ
ð Next.js 14ã®ã¬ã³ããªã³ã°ææ³ãçè§£ãã
ãŸããNext.jsãæäŸããäž»èŠãªã¬ã³ããªã³ã°ææ³ã«ã€ããŠæŽçããŸããããããããã®ç¹åŸŽãšé©ããŠããçšéãçè§£ããããšãã广çãªãã€ããªããã¬ã³ããªã³ã°æŠç¥ã®ç¬¬äžæ©ã§ãã
äž»èŠã¬ã³ããªã³ã°ææ³ã®æ¯èŒ
åã¬ã³ããªã³ã°ææ³ã®è©³çް
-
SSG (Static Site Generation) ðïž
- ç¹åŸŽ: ãã«ãæã«HTMLãçæããCDNã«ãã£ãã·ã¥
- ã¡ãªãã: æéã®èªã¿èŸŒã¿é床ããµãŒããŒè² è·ãªã
- ãã¡ãªãã: ã³ã³ãã³ãã®æŽæ°ã«ã¯ãã«ããå¿ èŠ
- æé©ãªçšé: ããã°èšäºã補åã«ã¿ãã°ããŒãžãããŒã±ãã£ã³ã°ããŒãž
-
SSR (Server-Side Rendering) ð
- ç¹åŸŽ: ãªã¯ãšã¹ãããšã«ãµãŒããŒã§HTMLãçæ
- ã¡ãªãã: åžžã«ææ°ã®ããŒã¿ã衚瀺ãåçãªã³ã³ãã³ãã«å¯Ÿå¿
- ãã¡ãªãã: ãµãŒããŒè² è·ãé«ãã衚瀺é床ãããé ã
- æé©ãªçšé: ããŒãœãã©ã€ãºãããããã·ã¥ããŒããæ€çŽ¢çµæããŒãž
-
ISR (Incremental Static Regeneration) â±ïž
- ç¹åŸŽ: äžå®ééã§ããŒãžãåçæ
- ã¡ãªãã: SSGã®é«éããšææ°ããŒã¿ã®ãã©ã³ã¹
- ãã¡ãªãã: ããŒã¿ã®é®®åºŠã«äžå®ã®é å»¶ããã
- æé©ãªçšé: 宿çã«æŽæ°ãããååããŒãžããã¥ãŒã¹ã³ã³ãã³ã
-
On-demand ISR ð¥
- ç¹åŸŽ: å¿ èŠãªã¿ã€ãã³ã°ã§ç¹å®ããŒãžãåçæ
- ã¡ãªãã: ããŒã¿æŽæ°æã«å³æåæ ãã€ã€é«é衚瀺ãç¶æ
- ãã¡ãªãã: åçæããªã¬ãŒã®å®è£ ãå¿ èŠ
- æé©ãªçšé: åšåº«ç¶æ³ãå€ããååããŒãžããŠãŒã¶ãŒã¬ãã¥ãŒè¡šç€º
Next.js 14ã§ã®å®è£ äŸ
åºæ¬çãªã¬ã³ããªã³ã°æ¹æ³ã®éžæãšå®è£ äŸãèŠãŠã¿ãŸãããïŒ
// SSGã®å®è£
äŸïŒéçãªè£œåã«ã¿ãã°ããŒãžïŒ
// pages/products/index.js
export async function getStaticProps() {
const products = await fetchAllProducts();
return {
props: {
products,
},
// ãªãã·ã§ã³: ãã«ãã®é »åºŠãå¢ããããšã§ããŒã¿ã®é®®åºŠãæ¹å
revalidate: false,
};
}
// SSRã®å®è£
äŸïŒæ€çŽ¢çµæããŒãžïŒ
// pages/search.js
export async function getServerSideProps({ query }) {
const { q } = query;
const searchResults = await searchProducts(q);
return {
props: {
searchResults,
searchQuery: q,
},
};
}
// ISRã®å®è£
äŸïŒå®æçã«æŽæ°ããã補å詳现ããŒãžïŒ
// pages/products/[id].js
export async function getStaticPaths() {
const popularProducts = await fetchPopularProducts();
return {
paths: popularProducts.map(product => ({
params: { id: product.id.toString() }
})),
fallback: 'blocking' // æªçæã®ããŒãžã¯ãªã¯ãšã¹ãæã«çæ
};
}
export async function getStaticProps({ params }) {
const product = await fetchProductById(params.id);
return {
props: {
product,
},
// 1æéããšã«åçæ
revalidate: 3600,
};
}
// On-demand ISRã®å®è£
äŸïŒAPIçµç±ã§ããªã¬ãŒïŒ
// pages/api/revalidate.js
export default async function handler(req, res) {
// ç§å¯ã®ããŒã¯ã³ã«ããæ€èšŒ
if (req.query.secret !== process.env.REVALIDATION_TOKEN) {
return res.status(401).json({ message: 'ç¡å¹ãªããŒã¯ã³ã§ã' });
}
try {
// æå®ããããã¹ãåæ€èšŒ
const path = req.query.path;
await res.revalidate(path);
return res.json({ revalidated: true });
} catch (err) {
return res.status(500).send('ãšã©ãŒãçºçããŸãã');
}
}
ð® ã³ã³ãã³ãã¿ã€ãå¥ã®æé©ãªã¬ã³ããªã³ã°æŠç¥
åäžã®ã¬ã³ããªã³ã°ææ³ã§ãã¹ãŠã®ããŒãžãåŠçããã®ã§ã¯ãªããã³ã³ãã³ãã¿ã€ãããšã«æé©ãªææ³ãéžæããããšãéèŠã§ãã
ECãµã€ãã«ãããæé©ãªã¬ã³ããªã³ã°éžæã¬ã€ã
ã³ã³ãã³ãã¿ã€ã | æšå¥šã¬ã³ããªã³ã° | éžæçç± | æŽæ°é »åºŠ |
---|---|---|---|
ããŒã ã»ã©ã³ãã£ã³ã°ããŒãž | SSG | é«é衚瀺ãæéèŠãSEOéèŠ | äœïŒé±1åçšåºŠïŒ |
ã«ããŽãªããŒãž | ISR | ãã©ã³ã¹ã®è¯ã衚瀺é床ãšé®®åºŠ | äžïŒæ¥1åçšåºŠïŒ |
人æ°åå詳现 | ISR | é«é衚瀺ãšåšåº«æ å ±ã®é©åºŠãªæŽæ° | äžïŒæ°æéããšïŒ |
éåžžåå詳现 | On-demand ISR | åšåº«å€æŽæã«å³ææŽæ° | åšåº«å€æŽæ |
æ€çŽ¢çµæããŒãž | SSR | ã¯ãšãªããšã«ç°ãªãçµæè¡šç€º | é«ïŒæ¯ãªã¯ãšã¹ãïŒ |
ã«ãŒãããŒãž | CSR+API | ãŠãŒã¶ãŒåºæã®æ å ±ãSEOäžèŠ | é«ïŒãªã¢ã«ã¿ã€ã ïŒ |
ãŠãŒã¶ãŒããã·ã¥ããŒã | SSR | ããŒãœãã©ã€ãºãããæ å ±è¡šç€º | é«ïŒæ¯ãªã¯ãšã¹ãïŒ |
ãã€ããªããã¢ãããŒãã®ã¡ãªãã
ð€ Claude 3.7ãæŽ»çšããæé©ã¬ã³ããªã³ã°èªåå€å®ã·ã¹ãã
ãããããæ¬èšäºã®æ žå¿éšåã§ãããŠãŒã¶ãŒè¡åããŒã¿ãšååç¹æ§ã«åºã¥ããŠãAIãæé©ãªã¬ã³ããªã³ã°æ¹æ³ãèªåå€å®ããã·ã¹ãã ãæ§ç¯ããæ¹æ³ã解説ããŸãã
Claude 3.7ãšã¯ïŒ
Claude 3.7ã¯ãAnthropic瀟ãéçºããææ°ã®å€§èŠæš¡èšèªã¢ãã«ïŒLLMïŒã§ããããã¹ãè§£æããã¿ãŒã³èªèãäºæž¬ã¢ããªã³ã°ãªã©ã®é«åºŠãªAIæ©èœãæäŸãã2025幎çŸåšãå€ãã®äŒæ¥ã§ããžãã¹ããã»ã¹ã®æé©åã«æŽ»çšãããŠããŸãã
ãŠãŒã¶ãŒè¡åããŒã¿åéã®ä»çµã¿
æé©ãªã¬ã³ããªã³ã°æ¹æ³ã倿ããããã«ã¯ã以äžã®ããŒã¿ãåéããå¿ èŠããããŸãïŒ
-
ããŒãžããã©ãŒãã³ã¹ããŒã¿
- èªã¿èŸŒã¿é床ïŒTTFBãLCPãTTIïŒ
- ã€ã³ã¿ã©ã¯ã·ã§ã³é å»¶ïŒFIDïŒ
- ã¬ã€ã¢ãŠãå®å®æ§ïŒCLSïŒ
-
ãŠãŒã¶ãŒè¡åããŒã¿
- ããŒãžæ»åšæé
- ã¹ã¯ããŒã«æ·±åºŠ
- ã¯ãªãã¯è¡å
- ã³ã³ããŒãžã§ã³ãã¹
-
ã³ã³ãã³ãç¹æ§ããŒã¿
- æŽæ°é »åºŠ
- åçã³ã³ãã³ãã®å²å
- SEOéèŠåºŠ
- ãã©ãã£ãã¯é
ããŒã¿åéã®å®è£ äŸïŒ
// components/PerformanceTracker.js
import { useEffect } from 'react';
import { getCLS, getFID, getLCP, getTTFB } from 'web-vitals';
export default function PerformanceTracker({ pageType, pageId }) {
useEffect(() => {
// Web Vitalsã®æž¬å®ãšéä¿¡
getCLS(metric => sendMetric('CLS', metric, pageType, pageId));
getFID(metric => sendMetric('FID', metric, pageType, pageId));
getLCP(metric => sendMetric('LCP', metric, pageType, pageId));
getTTFB(metric => sendMetric('TTFB', metric, pageType, pageId));
// ããŒãžé²èЧéå§æéã®èšé²
const startTime = performance.now();
// ã¹ã¯ããŒã«æ·±åºŠãã©ããã³ã°
let maxScrollDepth = 0;
const trackScroll = () => {
const scrollPercentage = Math.round(
(window.scrollY + window.innerHeight) / document.body.scrollHeight * 100
);
if (scrollPercentage > maxScrollDepth) {
maxScrollDepth = scrollPercentage;
}
};
window.addEventListener('scroll', trackScroll);
// ã¯ãªãŒã³ã¢ãã颿°ïŒããŒãžé¢è±æã«å®è¡ïŒ
return () => {
window.removeEventListener('scroll', trackScroll);
// æ»åšæéã®èšç®ãšéä¿¡
const stayDuration = Math.round((performance.now() - startTime) / 1000);
// ãŠãŒã¶ãŒè¡åããŒã¿ã®éä¿¡
fetch('/api/track-user-behavior', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
pageType,
pageId,
stayDuration,
maxScrollDepth,
timestamp: new Date().toISOString()
}),
});
};
}, [pageType, pageId]);
return null; // ãã®ã³ã³ããŒãã³ãã¯äœãã¬ã³ããªã³ã°ããªã
}
// ã¡ããªã¯ã¹éä¿¡é¢æ°
function sendMetric(name, metric, pageType, pageId) {
fetch('/api/track-performance', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
metricName: name,
value: metric.value,
pageType,
pageId,
timestamp: new Date().toISOString()
}),
});
}
Claude 3.7 APIãšã®é£æº
Claude 3.7ãžã®ããŒã¿éä¿¡ãšã¬ã³ããªã³ã°å€æã®ãªã¯ãšã¹ãåŠçãå®è£ ããŸãïŒ
Claude 3.7 API飿ºã³ãŒã
// lib/claude-api.js
import axios from 'axios';
const CLAUDE_API_KEY = process.env.CLAUDE_API_KEY;
const CLAUDE_API_URL = 'https://api.anthropic.com/v1/messages';
/**
* Claude 3.7ãžãªã¯ãšã¹ããéä¿¡ããæé©ãªã¬ã³ããªã³ã°æ¹æ³ãååŸãã
* @param {Object} pageData - ããŒãžã®ç¹æ§ããŒã¿
* @param {Array} performanceData - éå»ã®ããã©ãŒãã³ã¹ããŒã¿
* @param {Array} userBehaviorData - ãŠãŒã¶ãŒè¡åããŒã¿
* @returns {Promise<Object>} - æšå¥šã¬ã³ããªã³ã°æ¹æ³ãšçç±
*/
export async function getOptimalRenderingMethod(pageData, performanceData, userBehaviorData) {
try {
// ããŒãžãšããŒã¿ã®ç¹æ§ã«åºã¥ããŠããã³ãããæ§ç¯
const prompt = constructPrompt(pageData, performanceData, userBehaviorData);
// Claude 3.7ã«ãªã¯ãšã¹ã
const response = await axios.post(
CLAUDE_API_URL,
{
model: 'claude-3-7-sonnet-20240229',
max_tokens: 1000,
messages: [
{
role: 'user',
content: prompt
}
],
system: `ããªãã¯Next.jsã®å°éå®¶ã§ããããŒãžããŒã¿ãããã©ãŒãã³ã¹ããŒã¿ããŠãŒã¶ãŒè¡åããŒã¿ã«åºã¥ããŠã
æé©ãªã¬ã³ããªã³ã°æ¹åŒïŒSSGãSSRãISRãOn-demand ISRïŒã倿ããçç±ãšå
±ã«æšå¥šããŠãã ããã
JSON圢åŒã§ {"recommendedMethod": "SSG", "reason": "çç±", "revalidateInterval": æ°å€, "additionalSuggestions": ["ææ¡1", "ææ¡2"]} ã®åœ¢åŒã§è¿çããŠãã ããã`
},
{
headers: {
'Content-Type': 'application/json',
'x-api-key': CLAUDE_API_KEY,
'anthropic-version': '2023-06-01'
}
}
);
// ã¬ã¹ãã³ã¹ããJSONããŒã¿ãæœåº
const content = response.data.content[^0].text;
const jsonMatch = content.match(/``````/) ||
content.match(/{[\s\S]*?}/);
if (jsonMatch) {
try {
return JSON.parse(jsonMatch[^1] || jsonMatch[^0]);
} catch (parseError) {
console.error('JSONè§£æãšã©ãŒ:', parseError);
throw new Error('AIã¬ã¹ãã³ã¹ã®è§£æã«å€±æããŸãã');
}
}
throw new Error('AIããã®æå¹ãªã¬ã¹ãã³ã¹ãååŸã§ããŸããã§ãã');
} catch (error) {
console.error('Claude APIãšã©ãŒ:', error);
// ãšã©ãŒæã¯ããã©ã«ãå€ãè¿ã
return {
recommendedMethod: 'ISR',
reason: 'APIãšã©ãŒã®ãããæ±çšçãªISRãããã©ã«ããšããŠæšå¥šããŸã',
revalidateInterval: 3600,
additionalSuggestions: ['ãšã©ãŒãã°ã確èªããŠãã ãã']
};
}
}
/**
* AIãžã®ããã³ãããæ§ç¯ãã颿°
*/
function constructPrompt(pageData, performanceData, userBehaviorData) {
return `
Next.jsã®æé©ãªã¬ã³ããªã³ã°æ¹æ³ã倿ããããã«ã以äžã®ããŒã¿ãåæããŠãã ããã
## ããŒãžæ
å ±
- ã¿ã€ã: ${pageData.type}
- URL: ${pageData.url}
- æŽæ°é »åºŠ: ${pageData.updateFrequency}
- åçã³ã³ãã³ãå²å: ${pageData.dynamicContentPercentage}%
- SEOéèŠåºŠ: ${pageData.seoImportance}/10
- 平忥éãã©ãã£ãã¯: ${pageData.averageDailyTraffic}
## ããã©ãŒãã³ã¹ããŒã¿ïŒéå»7æ¥éã®å¹³åïŒ
${JSON.stringify(performanceData, null, 2)}
## ãŠãŒã¶ãŒè¡åããŒã¿ïŒéå»7æ¥éïŒ
- å¹³åæ»åšæé: ${userBehaviorData.averageStayDuration}ç§
- å¹³åã¹ã¯ããŒã«æ·±åºŠ: ${userBehaviorData.averageScrollDepth}%
- ããŠã³ã¹ç: ${userBehaviorData.bounceRate}%
- ã³ã³ããŒãžã§ã³ç: ${userBehaviorData.conversionRate}%
ãããã®ããŒã¿ã«åºã¥ããŠããã®ããŒãžã«æé©ãªNext.jsã®ã¬ã³ããªã³ã°æ¹æ³ïŒSSGãSSRãISRãOn-demand ISRïŒã倿ãããã®éžæçç±ãšå®è£
ã®ã¢ããã€ã¹ãJSON圢åŒã§æäŸããŠãã ãããISRã®å Žåã¯æé©ãªåæ€èšŒééãææ¡ããŠãã ããã
`;
}
ã¬ã³ããªã³ã°å€æã·ã¹ãã ã®å®è£
Claude 3.7ã®åæçµæã«åºã¥ããŠãããŒãžããšã«æé©ãªã¬ã³ããªã³ã°æ¹æ³ãé©çšããã·ã¹ãã ãå®è£ ããŸãïŒ
// pages/api/optimize-rendering.js
import { getOptimalRenderingMethod } from '../../lib/claude-api';
import { getPageData } from '../../lib/page-data';
import { getPerformanceData } from '../../lib/analytics';
import { getUserBehaviorData } from '../../lib/user-behavior';
import { updateRenderingConfig } from '../../lib/config-manager';
export default async function handler(req, res) {
if (req.method !== 'POST') {
return res.status(405).json({ message: 'Method not allowed' });
}
try {
const { pageId, pageType } = req.body;
// å¿
èŠãªããŒã¿ã®ååŸ
const pageData = await getPageData(pageId, pageType);
const performanceData = await getPerformanceData(pageId, 7); // éå»7æ¥é
const userBehaviorData = await getUserBehaviorData(pageId, 7); // éå»7æ¥é
// Claude 3.7ã«ããåæ
const optimizationResult = await getOptimalRenderingMethod(
pageData,
performanceData,
userBehaviorData
);
// èšå®ã®æŽæ°
await updateRenderingConfig(pageId, optimizationResult);
// çµæãè¿ã
res.status(200).json({
pageId,
optimizationResult,
success: true
});
} catch (error) {
console.error('æé©åãšã©ãŒ:', error);
res.status(500).json({
message: 'æé©ååŠçäžã«ãšã©ãŒãçºçããŸãã',
error: error.message
});
}
}
åçãªã¬ã³ããªã³ã°æ¹æ³éžæã®å®è£
Next.jsã®rewritesæ©èœãšã«ã¹ã¿ã ããã«ãŠã§ã¢ã䜿çšããŠãAIã®å€æã«åºã¥ãåçã«ã¬ã³ããªã³ã°æ¹æ³ãåãæ¿ããå®è£ äŸïŒ
// middleware.js
import { NextResponse } from 'next/server';
import { getRenderingConfig } from './lib/config-manager';
export async function middleware(request) {
const url = request.nextUrl.clone();
const { pathname } = url;
// 管çç»é¢ãAPIã«ãŒãã¯ã¹ããã
if (pathname.startsWith('/api/') || pathname.startsWith('/admin/')) {
return NextResponse.next();
}
try {
// ããŒãžIDã®æœåºïŒå®éã®å®è£
ã§ã¯ãã¹ããé©åã«æœåºïŒ
const pageId = extractPageId(pathname);
if (!pageId) return NextResponse.next();
// ã¬ã³ããªã³ã°èšå®ã®ååŸ
const renderingConfig = await getRenderingConfig(pageId);
if (!renderingConfig) return NextResponse.next();
// èšå®ã«åºã¥ããŠã«ãŒãã倿Ž
const { recommendedMethod } = renderingConfig;
if (recommendedMethod === 'SSR') {
// SSRããŒãžã§ã³ã«ãªãã€ã¬ã¯ã
url.pathname = `/ssr${pathname}`;
return NextResponse.rewrite(url);
}
if (recommendedMethod === 'ISR') {
// ISRããŒãžã§ã³ã«ãªãã€ã¬ã¯ã
url.pathname = `/isr${pathname}`;
return NextResponse.rewrite(url);
}
// ããã©ã«ãã¯SSG
return NextResponse.next();
} catch (error) {
console.error('ããã«ãŠã§ã¢ãšã©ãŒ:', error);
return NextResponse.next();
}
}
// ãã¹ããããŒãžIDãæœåºãã颿°
function extractPageId(pathname) {
// 補åããŒãžã®äŸ: /products/[id]
const productMatch = pathname.match(/^\/products\/([a-zA-Z0-9-]+)$/);
if (productMatch) return `product-${productMatch[^1]}`;
// ã«ããŽãªããŒãžã®äŸ: /categories/[slug]
const categoryMatch = pathname.match(/^\/categories\/([a-zA-Z0-9-]+)$/);
if (categoryMatch) return `category-${categoryMatch[^1]}`;
// ãã®ä»ã®ããŒãžã¯ãã¹èªäœãIDãšããŠäœ¿çš
return pathname === '/' ? 'home' : pathname.slice(1).replace(/\//g, '-');
}
export const config = {
matcher: ['/((?!_next/|_static/|_vercel|[\\w-]+\\.\\w+).*)'],
};
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