IT 3215: Unit 03 Discussion DQ2 Challenges With Dynamic Images, Events, and the DOM

IT3215 Introduction to JavaScript

Unit 03 Discussion

DQ1 Events,
Dynamic Images, and Modularization

The ability
to animate graphics with JavaScript has resulted in increased interactivity of
Web sites. As we add more functionality into our scripts, it is important that
we take the time to modularize our code to make it more efficient. We want to
ensure our functions are split up for reuse.

Research
and describe some tips and suggestions for someone new to JavaScript to get
started. In particular, focus on at least two of the following points while
providing sample code (with comments) of each

Explain
which events and methods we can use to handle user interaction with images.

Distinguish
among HTML events, mouse events, and keyboard events.

Describe
the use of cross-browser compatible functions or methods for attaching and
detaching event handlers.

Describe
the use of images and preloaded images in applications like image rollovers and
slide shows.

Describe
setTimeout, setInterval, clearTimeout, and clearInterval.

Explain why
modularizing a program makes it more efficient.

Identify
the advantages and disadvantages of modularization.

Response
Guidelines

Comment on
the posts of at least two other learners, offering insights, solutions,
examples, or opinions that add depth and value to the conversation.

Learning
Components

This
activity will help you achieve the following learning components:

View
examples of effective JavaScript comments that describe and explain variables
and functions.

Examine how
JavaScript functions can assist in creating fast-loading image galleries.

Understand
the use of the settimeout function.

Understand
principles of modular code.

Understand
JavaScript timers including how the setInterval timer is used.

Resources

Discussion
Participation Scoring Guide.

Toggle
Drawer

DQ2 Challenges
With Dynamic Images, Events, and the DOM

Note: The
second discussion in each unit of this course is dedicated to community sharing
of challenges and solutions you have encountered while completing your weekly
assignment. You are encouraged to post and respond early in the week to share
experiences that you are having, and to help others with theirs. This is how
coders solve tough issues: they rely on one another!

Dynamic
images and events can make a Web page pop. For some, creati

ng this interactivity
is a snap; for others it can be a bit of a challenge.

Discuss one
or more of the challenges or experiences that you encountered when trying to
complete this week’s assignment. How did you try to address it or solve it?

Response
Guidelines

Comment on
the post of at least two other learners. Share suggestions to help the posters
address their challenges.

Resources

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Use this document as a checklist for each paper you will write throughout your GCU graduate program. Follow specific instructions indicated in the assignment and use this checklist to help ensure correct grammar and APA formatting. Refer to the APA resources available in the GCU Library and Student Success Center.

☐ APA paper template (located in the Student Success Center/Writing Center) is utilized for the correct format of the paper. APA style is applied, and format is correct throughout.

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Empirical Journal Article: This type of scholarly resource is a subset of scholarly articles that reports the original finding of an observational or experimental research study. Common aspects found within an empirical article include: literature review, methodology, results, and discussion.

Adapted from “Evaluating Resources: Defining Scholarly Resources,” located in Research Guides in the GCU Library.

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