Key Concepts
Übersicht
A web page you look at is not a file sitting on a computer somewhere waiting to be collected. It is the end of a short assembly line. Something on a distant machine may have built it a fraction of a second ago out of a template and a database query; the browser then decided how it should look; and code running inside the browser is watching for you to click something. Four different things are at work, in two different places, and knowing which is which is the whole of this topic.
This lesson separates them. You will learn that HTML creates the structure of a page while CSS changes its style, why keeping those two apart is worth the trouble, and the difference between server-side scripting, which builds pages before they are sent, and client-side scripting, which adds functionality once they have arrived. That last distinction, where the code runs, decides almost everything else about what each kind of script can and cannot do.
Ziele
- Know that web pages can be constructed using HTML and CSS. Know that HTML is used to create the structure of a web page and that CSS can be used to change the style of the page. Understand that server-side scripting languages can be used on a web server for dynamic generation of web pages. Understand that client-side scripting languages can be used to add additional functionality to web pages.
Mindmap
Dieses Thema ist als Karte dargestellt, damit die Zusammenhange sichtbar werden.
Mindmap in der App offnen
Lektionshinweis
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Unterrichtsbewertung
Herzlichen Glückwunsch zum Abschluss der Lektion über Key Concepts. Jetzt, da Sie die wichtigsten Konzepte und Ideen erkundet haben,
Sie werden auf eine Mischung verschiedener Fragetypen stoßen, darunter Multiple-Choice-Fragen, Kurzantwortfragen und Aufsatzfragen. Jede Frage ist sorgfältig ausgearbeitet, um verschiedene Aspekte Ihres Wissens und Ihrer kritischen Denkfähigkeiten zu bewerten.
Nutzen Sie diesen Bewertungsteil als Gelegenheit, Ihr Verständnis des Themas zu festigen und Bereiche zu identifizieren, in denen Sie möglicherweise zusätzlichen Lernbedarf haben.
- What is HTML used for? A. To create the structure of a web page B. To change the colours and fonts of a page C. To store data in a database D. To encrypt data sent across a network Answer: A
- What is CSS used for? A. To create the structure of a web page B. To change the style of a web page C. To run code on a web server D. To connect two networks together Answer: B
- Where does a server-side script run? A. In the visitor's browser B. On the web server C. On the visitor's router D. In the page's CSS file Answer: B
- Which task is most suitable for a client-side scripting language? A. Checking a password against the stored one B. Reading a customer's order history from a database C. Expanding a section of a page when it is clicked D. Deciding whether a discount code is genuine Answer: C
- Why must a check that matters be repeated on the server even if it is done in the browser? A. Because browsers cannot run scripts B. Because client-side code is sent to the visitor and can be read, altered or switched off C. Because CSS overrides client-side script D. Because HTML cannot contain forms Answer: B
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