September 2024
Intermediate to advanced
320 pages
6h 11m
German
Content preview from JavaScript Schnelleinstieg - Dynamische Webseiten programmieren in 14 Tagen
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Asynchrones JavaScript
13.1 Zeitgesteuerte Anwendungen
13.1.1 Asynchrones JavaScript
Synchron bedeutet im wörtlichen Sinn »gleichzeitig« oder »zur selben Uhrzeit«. In der Programmierung bedeutet »synchron«, dass zur selben Zeit mehrere Operationen gleichzeitig durchgeführt werden können. Bei einer asynchronen Bearbeitung hingegen liegt zwischen der Anfrage und der Antwort eine Verzögerung oder Wartezeit von unbestimmter Dauer.
JavaScript kann Aufgaben nicht gleichzeitig ausführen. Die Skriptsprache JavaScript ist »Single Threaded« – der Ablauf eines Skripts geschieht Anweisung für Anweisung entlang eines »einzelnen Fadens«. Eine Anweisung ...
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