April 2025
Intermediate to advanced
706 pages
22h 40m
Italian
Content preview from JavaScript: The Definitive Guide, 7a edizione
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Capitolo 15. JavaScript nei browser web
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Il linguaggio JavaScript è stato creato nel 1994 con l'esplicito scopo di consentire un comportamento dinamico nei documenti visualizzati dai browser web. Da allora il linguaggio si è evoluto in modo significativo e, allo stesso tempo, la portata e le capacità della piattaforma web sono cresciute in modo esplosivo. Oggi i programmatori JavaScript possono pensare al web come a una piattaforma completa per lo sviluppo di applicazioni. I browser web sono specializzati nella visualizzazione di testo formattato e immagini, ma, come i sistemi operativi nativi, i browser forniscono anche altri servizi, tra cui grafica, video, audio, networking, storage e threading. JavaScript è il linguaggio che permette alle applicazioni web di utilizzare i servizi forniti dalla piattaforma web e questo capitolo mostra come utilizzare i servizi più importanti.
Il capitolo inizia con il modello di programmazione della piattaforma web, spiegando come gli script vengono incorporati nelle pagine HTML(§15.1) e come il codice JavaScript viene attivato in modo asincrono dagli eventi(§15.2). Le sezioni successive a questo materiale introduttivo documentano le API JavaScript di base che permettono alle tue applicazioni web di:
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