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Fluent React
book

Fluent React

by Tejas Kumar
March 2025
Intermediate to advanced
336 pages
9h 15m
Italian
O'Reilly Media, Inc.
Audio summary available
Content preview from Fluent React

Capitolo 4. La riconciliazione interna

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Per essere veramente fluenti con React, dobbiamo capire cosa fanno le sue funzioni. Finora abbiamo compreso JSX e React.createElement. Abbiamo anche compreso il DOM virtuale con un livello di dettaglio apprezzabile. In questo capitolo esploreremo le sue applicazioni pratichein React e capiremo cosa fa ReactDOM.createRoot(element).​ren⁠der(). In particolare, esploreremo come React costruisce il suo DOM virtuale e poi aggiorna il DOM reale attraverso un processo chiamatoriconciliazione .

Capire la riconciliazione

Ricapitolando, il DOM virtuale di React è un modello dello stato dell'interfaccia utente desiderato. React prende questo blueprint e, attraverso un processo chiamatoriconciliazione, lo rende reale in un determinato ambiente host; di solito un browser web, ma anche altri ambienti come shell, piattaforme native come iOS e Android e altro ancora.

Considera il seguente frammento di codice:

import { useState } from "react";

const App = () => {
  const [count, setCount] = useState(0);

  return (
    <main>
      <div>
        <h1>Hello, world!</h1>
        <span>Count: {count}</span>
        <button onClick={() => setCount(count + 1)}>Increment</button>
      </div>
    </main>
  );
};

Questo frammento di codice contiene una descrizione dichiarativa di ciò che vogliamo che sia lo stato dell'interfaccia utente: un albero di elementi. Sia i nostri compagni ...

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Publisher Resources

ISBN: 9798341638716