React eksperimental_useSubscription yordamida real-vaqt maʼlumotlaridan foydalanish: Toʻliq qoʻllanma

const stockSource = {
  read(ticker) {
    // API-dan birja narxini olishni simulyatsiya qilish
    return getStockPrice(ticker);
  },
  subscribe(callback) {
    const intervalId = setInterval(() => {
      callback(); // React-ga qayta tiklash uchun xabar berish
    }, 1000); // Har soniyada yangilash
    return () => clearInterval(intervalId); // Oʻchirishda tozalash
  },
};

// Birja narxini olishni simulyatsiya qilish uchun dummy funksiya
function getStockPrice(ticker) {
  // Haqiqiy ilovada haqiqiy API chaqiruvi bilan almashtiring
  const randomPrice = Math.random() * 100;
  return { ticker, price: randomPrice.toFixed(2) };
}

import { unstable_useSubscription as useSubscription } from 'react';
import { useState } from 'react';

function StockTicker() {
  const [ticker, setTicker] = useState('AAPL');
  const stockData = useSubscription(stockSource, ticker);

  return (
    

      {stockData.ticker}: ${stockData.price}
      

       setTicker(e.target.value)}
      />
    
  );
}

export default StockTicker;

const documentSource = {
  read(documentId) {
    // Serverdan hujjat tarkibini olishni simulyatsiya qilish
    return getDocumentContent(documentId);
  },
  subscribe(callback, documentId) {
    // Hujjat yangilanishlarini qabul qilish uchun WebSocket ulanishini simulyatsiya qilish
    const websocket = new WebSocket(`ws://example.com/documents/${documentId}`);

    websocket.onmessage = (event) => {
      // Hujjatning yangi versiyasi WebSocket ulanishi orqali qabul qilinganda
      callback(); // React-ga qayta tiklash uchun xabar berish
    };

    return () => websocket.close(); // Oʻchirishda tozalash
  },
};

// Hujjat tarkibini olishni simulyatsiya qilish uchun dummy funksiya
function getDocumentContent(documentId) {
  // Haqiqiy ilovada haqiqiy API chaqiruvi bilan almashtiring
  return `Document content for document ${documentId} - Version: ${Math.random().toFixed(2)}`;
}

import { unstable_useSubscription as useSubscription } from 'react';

function DocumentEditor({ documentId }) {
  const documentContent = useSubscription(documentSource, documentId);

  return (
    

          </div>
  );
}

export default DocumentEditor;
</pre></code>

<p>Ushbu misolda <code>DocumentEditor</code> komponenti taqdim etilgan <code>documentId</code> yordamida <code>documentSource</code>ga obuna boʻladi. Simulyatsiya qilingan WebSocket ulanishi yangilanishni qabul qilganda, komponent eng yangi hujjat tarkibi bilan qayta tiklanadi.</p>

<h3>3-misol: Redux doʻkoniga integratsiya</h3>

<p><code>experimental_useSubscription</code> Redux doʻkonidagi oʻzgarishlarga obuna boʻlish uchun ham ishlatilishi mumkin. Bu Redux holatining maʼlum bir qismlari oʻzgarganda komponentlarni samarali yangilash imkonini beradi.</p>

<p>Sizda <code>user</code> kesimi bilan Redux doʻkoni bor deb faraz qilaylik:</p>

<code><pre>
// Redux doʻkonini sozlash (soddalashtirilgan)
import { createStore } from 'redux';

const initialState = {
  user: {
    name: 'John Doe',
    isLoggedIn: false,
  },
};

function reducer(state = initialState, action) {
  switch (action.type) {
    case 'UPDATE_USER':
      return { ...state, user: { ...state.user, ...action.payload } };
    default:
      return state;
  }
}

const store = createStore(reducer);
</pre></code>

<p>Endi, <code>user</code> kesimidagi oʻzgarishlarga obuna boʻlish uchun <code>userSource</code>ni yarataylik:</p>

<code><pre>
const userSource = {
  read() {
    return store.getState().user;
  },
  subscribe(callback) {
    const unsubscribe = store.subscribe(callback);
    return unsubscribe;
  },
};
</pre></code>

<p>Va nihoyat, React komponentini yarataylik:</p>

<code><pre>
import { unstable_useSubscription as useSubscription } from 'react';
import { useDispatch } from 'react-redux';

function UserProfile() {
  const user = useSubscription(userSource);
  const dispatch = useDispatch();

  return (
    <div>
      <b>Name:</b> {user.name}
      <br />
      <b>Logged In:</b> {user.isLoggedIn ? 'Yes' : 'No'}
      <button onClick={() => dispatch({ type: 'UPDATE_USER', payload: { isLoggedIn: !user.isLoggedIn } })}>Toggle Login</button>
    </div>
  );
}

export default UserProfile;
</pre></code>

<p>Ushbu misolda <code>UserProfile</code> komponenti <code>userSource</code>ga obuna boʻladi. Redux doʻkonidagi <code>user</code> kesimi oʻzgargan har safar, komponent yangilangan foydalanuvchi maʼlumotlari bilan qayta tiklanadi.</p>

<h2>Murakkab masalalar va eng yaxshi amaliyotlar</h2>

<ul>
  <li><b>Xatoliklarni boshqarish:</b> Maʼlumotlarni olish vaqtida yuzaga kelishi mumkin boʻlgan xatoliklarni yaxshi boshqarish uchun <code>manba</code> obyektining <code>read</code> usulida mustahkam xatoliklarni boshqarishni amalga oshiring.</li>
  <li><b>Ishlashni optimallashtirish:</b> Maʼlumotlar haqiqatdan oʻzgarmaganida keraksiz qayta tiklanishlarni oldini olish uchun <code>konfiguratsiya</code> obyektidagi <code>shouldNotify</code> opsiyasidan foydalaning. Bu murakkab maʼlumotlar tuzilmalari uchun ayniqsa muhimdir.</li>
  <li><b>Server-side rendering (SSR):</b> Server-side rendering (SSR) vaqtida dastlabki maʼlumotlar serverda mavjudligini taʼminlash uchun <code>konfiguratsiya</code> obyektida <code>getServerSnapshot</code> amalga oshirilishini taʼminlang.</li>
  <li><b>Maʼlumotlarni oʻzgartirish:</b> Komponent tomonidan ishlatilishidan oldin maʼlumotlar toʻgʻri formatda boʻlishini taʼminlash uchun <code>read</code> usulida maʼlumotlarni oʻzgartirishni amalga oshiring.</li>
  <li><b>Resurslarni tozalash:</b> Xotira oqishini oldini olish uchun <code>subscribe</code> usulining tozalash funksiyasida maʼlumot manbasidan toʻgʻri obunani bekor qilishni taʼminlang.</li>
</ul>

<h2>Global masalalar</h2>

<p>Global auditoriya uchun real-vaqt maʼlumotlariga ega ilovalarni ishlab chiqishda quyidagilarni hisobga oling:</p>

<ul>
  <li><b>Vaqt zonalari:</b> Vaqtga bogʻliq maʼlumotlarni koʻrsatganda vaqt zonasi konversiyalarini mos ravishda boshqaring. Masalan, birja narxlari foydalanuvchining mahalliy vaqt zonasida narxlarni koʻrsatishi kerak.</li>
  <li><b>Valyuta konversiyasi:</b> Moliyaviy maʼlumotlarni koʻrsatganda valyuta konversiyasi imkoniyatlarini taqdim eting. Real-vaqt almashuv kurslarini olish uchun ishonchli valyuta konversiyasi API-sidan foydalanishni koʻrib chiqing.</li>
  <li><b>Lokalizatsiya:</b> Foydalanuvchi lokaliga mos ravishda sana va son formatlarini lokalizatsiya qiling.</li>
  <li><b>Tarmoq kechikishi:</b> Potentsial tarmoq kechikishi muammolaridan xabardor boʻling, ayniqsa sekinroq internet ulanishiga ega mintaqalardagi foydalanuvchilar uchun. Foydalanuvchi tajribasini yaxshilash uchun optimistik yangilashlar va buferlash kabi usullarni amalga oshiring.</li>
  <li><b>Maʼlumotlar maxfiyligi:</b> Foydalanuvchi maʼlumotlarini boshqarishda GDPR va CCPA kabi maʼlumotlar maxfiyligi qoidalariga rioya etilishiga ishonch hosil qiling.</li>
</ul>

<h2><code>experimental_useSubscription</code> ga alternativalar</h2>

<p><code>experimental_useSubscription</code> real-vaqt maʼlumotlarini boshqarishning qulay usulini taklif qilsa-da, bir nechta muqobil yondashuvlar mavjud:</p>

<ul>
  <li><b>Context API:</b> Bir nechta komponentlar orasida maʼlumotlarni almashish uchun Context API-sidan foydalanish mumkin. Biroq, tez-tez yangilanishlarni boshqarish uchun <code>experimental_useSubscription</code> qadar samarali boʻlmasligi mumkin.</li>
  <li><b>Redux yoki boshqa holatni boshqarish kutubxonalari:</b> Redux va boshqa holatni boshqarish kutubxonalari ilova holatini boshqarish uchun markazlashtirilgan doʻkonni taqdim etadi. Ulardan real-vaqt maʼlumotlarini boshqarish uchun foydalanish mumkin, ammo ular qoʻshimcha murakkablikni keltirib chiqarishi mumkin.</li>
  <li><b>Event tinglovchilari bilan moslashtirilgan hook-lar:</b> Maʼlumot manbalariga obuna boʻlish uchun event tinglovchilaridan foydalanadigan moslashtirilgan hook-larni yaratishingiz mumkin. Ushbu yondashuv obuna jarayonini yanada koʻproq nazorat qilish imkonini beradi, ammo u koʻproq qoʻshimcha kodni talab qiladi.</li>
</ul>

<h2>Xulosa</h2>

<p><code>experimental_useSubscription</code> React ilovalarida real-vaqt maʼlumotlariga obunani boshqarishning kuchli va samarali usulini taqdim etadi. Uning deklarativ tabiati, optimallashtirilgan ishlashi va Reactning komponent hayotiy tsikli bilan muvaffaqiyatli integratsiyasi uni dinamik va javobgar foydalanuvchi interfeyslarini yaratish uchun qimmatli vositaga aylantiradi. Biroq, bu eksperimental API ekanligini unutmang, shuning uchun uni ishlab chiqarish muhitlariga qoʻllashdan oldin uning barqarorligini diqqat bilan koʻrib chiqing.</p>

<p>Ushbu qoʻllanmada keltirilgan tamoyillar va eng yaxshi amaliyotlarni tushunish orqali siz <code>experimental_useSubscription</code> dan foydalanib, React ilovalaringizda real-vaqt maʼlumotlarining toʻliq potentsialini ochishingiz mumkin, bu esa butun dunyo boʻylab foydalanuvchilar uchun jozibali va maʼlumotli tajribalarni yaratadi.</p>

<h2>Qoʻshimcha oʻrganish</h2>

<ul>
 <li><b>React hujjatlari:</b> <code>experimental_useSubscription</code> boʻyicha yangilanishlar uchun rasmiy React hujjatlariga rioya qiling.</li>
 <li><b>Jamiyat forumlari:</b> Ushbu hook bilan boshqa ishlab chiquvchilarning tajribalaridan oʻrganish uchun forumlar va muhokama taxtalarida React jamiyati bilan shugʻullaning.</li>
 <li><b>Eksperimentlar:</b> Oʻrganishning eng yaxshi usuli bu amaliyotdir. Uning imkoniyatlari va cheklovlarini chuqurroq tushunish uchun oʻz loyihangizda <code>experimental_useSubscription</code> bilan eksperiment qiling.</li>
</ul></div><footer class="mt-12 pt-8 border-t border-gray-200"><h3 class="text-sm font-semibold text-gray-900 mb-3 dark:text-white/90">Tags:</h3><div class="flex flex-wrap gap-2"><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">React</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">eksperimental_useSubscription</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">obuna hook-i</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">real-vaqt maʼlumotlari</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">holatni boshqarish</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">ishlashni optimallashtirish</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">maʼlumotlarni olish</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">asinxron maʼlumotlar</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">React Hooks</span><span class="inline-block bg-gray-100 text-gray-800 px-3 py-1 rounded-full text-sm hover:bg-gray-200 transition-colors dark:bg-neutral-800 dark:text-white dark:hover:bg-neutral-700">JavaScript</span></div></footer></article></div><script>$RS=function(a,b){a=document.getElementById(a);b=document.getElementById(b);for(a.parentNode.removeChild(a);a.firstChild;)b.parentNode.insertBefore(a.firstChild,b);b.parentNode.removeChild(b)};$RS("S:2","P:2")</script><script>$RB=[];$RV=function(b){$RT=performance.now();for(var a=0;a<b.length;a+=2){var c=b[a],e=b[a+1];null!==e.parentNode&&e.parentNode.removeChild(e);var f=c.parentNode;if(f){var g=c.previousSibling,h=0;do{if(c&&8===c.nodeType){var d=c.data;if("/$"===d||"/&"===d)if(0===h)break;else h--;else"$"!==d&&"$?"!==d&&"$~"!==d&&"$!"!==d&&"&"!==d||h++}d=c.nextSibling;f.removeChild(c);c=d}while(c);for(;e.firstChild;)f.insertBefore(e.firstChild,c);g.data="$";g._reactRetry&&g._reactRetry()}}b.length=0};
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