April 2015
Intermediate to advanced
288 pages
6h 9m
German
Content preview from HTML5, JavaScript und jQueryBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
17 Fehlerbehandlung
In diesem Buch haben wir eine Webanwendung entwickelt. Es gibt jedoch einen wichtigen Schritt, den wir dabei ausgelassen haben: eine Strategie für die Fehlerbehandlung.
Zwei Fehlerkategorien
In einer Webanwendung können aus den verschiedensten Gründen Fehler auftreten. Es ist aber hilfreich, diese in zwei Kategorien zu unterteilen:
Ausnahmen
Vorhersehbare Fehler
Ein Beispiel dafür ist eine fehlgeschlagene AJAX-Anfrage, weil der Nutzer nicht mit dem Internet verbunden ist. Wir sprechen hier von »Ausnahmen«, da es sich um Ausnahmen von der Regel handelt.
Bugs
Nicht vorhersehbare Fehler
Bei diesen »Bugs« handelt es sich meist um Programmierfehler, zum Beispiel den Zugriff auf ein Element in einem nicht vorhandenen Array oder ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.