Virtual DOM (VDOM) wata gajeriyar zuwa zuwa tsarin jikin JavaScript ne wanda yaya me jinaye UI ya kamata. Shi ne tsantsar wakilci a cikin alaƙa — ba gaske na browser DOM ba. React ke yi amfani da shi saboda ka takaita gaske na DOM kai tsaye yana jiya, kuma yin haka da hannu a kowane canji na jihar yana da rashin kyau.
Lokacin da aka canja jiha, React ba tona fitar da fuska jiya. A maimakon haka:
function Counter() {
const [n, setN] = useState(0);
// Each click produces a NEW virtual tree describing <button>{n}</button>.
// React compares old vs new and updates ONLY the text node that changed,
// not the whole button or the page.
return <button onClick={() => setN(n + 1)}>{n}</button>;
}
Domin haka ka rubuta lambar niye-niye ("UI ya faɗi yadda haka don wannan jiha") kuma React yana tsiratun ayyukan DOM masu ɗaka-ɗaka a gare ka.
document.querySelector + sauya.Ɗakin karatu na tambayoyin hira na IT tare da amsoshi cikakke — daga Junior zuwa Senior.
Ba da Gudummawa