FAQ - Mod 5 - Revision history

Todd at 17:12, 10 January 2026

2026-01-10T17:12:29Z

Mitch at 02:09, 21 December 2020

2020-12-21T02:09:35Z

Mitch: Created page with "Welcome to the frequently asked questions page for Module 5. As many common questions can come up on Piazza, some of those questions are consolidated here. == File Structure/..."

2020-12-21T01:32:06Z

Created page with "Welcome to the frequently asked questions page for Module 5. As many common questions can come up on Piazza, some of those questions are consolidated here. == File Structure/..."

New page

Welcome to the frequently asked questions page for Module 5. As many common questions can come up on Piazza, some of those questions are consolidated here.

== File Structure/Languages ==

=== Can I redirect users to another page after login/for any other reason? ===
For this module, you can '''not''' redirect a user to another page for login or refresh the page on logout. You should have '''one''' single html file , and any on-screen changes should be done through DOM manipulation in Javascript.

=== Can/should I use PHP in this module? ===
PHP should be used to access the MySQL database for this module, but you should use Javascript for most other functionality. The focus of this module is for you to learn more about Javascript and the DOM, so do not use PHP to redirect to other pages or refresh the current one.

== CSRF Tokens ==

=== How do I pass CSRF tokens between PHP and Javascript? ===
At the end of your PHP script execution, you can send values back to where you initially called the script from. Think about how you can use this to then store the token in Javascript.

== HTML Validator ==

=== I'm getting a validation warning about missing an src attribute for my weather widget, what should I do about this? ===
Before you fetch the data in the weather widget, you may not have a src attribute for your img tags. Your warning will likely look like this:

<source lang=bash>
Element img is missing required attribute src
</source>

An easy way to avoid this warning is to simply put a temporary image on the screen before you load in the weather data.

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	An easy way to avoid this warning is to simply put a temporary image on the screen before you load in the weather data.		An easy way to avoid this warning is to simply put a temporary image on the screen before you load in the weather data.
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		+	[[Category: Module 5]]

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 Welcome to the frequently asked questions page for Module 5. As many common questions can come up on Piazza, some of those questions are consolidated here.
-== File Structure/Languages ==
+== Setup/Logistics ==
-=== Can I redirect users to another page after login/for any other reason? ===
+=== Should I use a database for Module 5? ===
-For this module, you can '''not''' redirect a user to another page for login or refresh the page on logout. You should have '''one''' single html file , and any on-screen changes should be done through DOM manipulation in Javascript.
+You can store everything locally in this module. No need to use a database.
-=== Can/should I use PHP in this module? ===
+=== How can I add an image to my instance? SFTP isn't working ===
-PHP should be used to access the MySQL database for this module, but you should use Javascript for most other functionality. The focus of this module is for you to learn more about Javascript and the DOM, so do not use PHP to redirect to other pages or refresh the current one.
+There are a couple different ways to load an image onto your instance. One of the easiest is to use wget. When logged into your instance, run the following command in the terminal:
-== CSRF Tokens ==
+<source lang=bash>
-=== How do I pass CSRF tokens between PHP and Javascript? ===
+== NPM/Mime ==
-At the end of your PHP script execution, you can send values back to where you initially called the script from. Think about how you can use this to then store the token in Javascript.
+There are a couple common errors that students run into when setting up their Node.js. One of the most common looks like this
-== HTML Validator ==
+The specific path may differ for your personal machine, but any path that ends in "package.json" in this error is likely a result of the same problem.
-=== I'm getting a validation warning about missing an src attribute for my weather widget, what should I do about this? ===
+This is another common error message:
 <source lang=bash>
-Element img is missing required attribute src
+Cannot find module 'mime' error when running static_server.js
 </source>
-An easy way to avoid this warning is to simply put a temporary image on the screen before you load in the weather data.
+Both of these errors are a result of not setting up the package.json correctly. In fact, both are usually a result of not creating package.json at. After installing Node.js, you '''must''' run the following command to generate the package.json file.
 [[Category: Module 5]]