IT3215 | Programming Methods in Computer Science - Capella university

4. Jen

Stevens Hint: Use the splice function in order to remove a specific item from the array. Tip: The array index starts at 0, so when displaying the index, you will need to add 1 to the index value when it is displayed. Make sure

to do the following:

Write JavaScript to delete a specific volunteer by using loop. Write JavaScript that loops through the volunteer list to display the index value. Once completed, view your pages in each of your two selected Web browsers to see if the content renders appropriately and consistently within each. Next, verify that your code is error-free using the appropriate browser-specific development tool found in the Resources. Take a screen capture of each of your validation results and save it for submission.

Submission

Requirements

Upload your Web site files to your Web host. Submit your

work in the courseroom using a single Zip file containing the following:

Your entire Web site, including all associated files. A Word

document with:

The url to your Web site so faculty can view your site on a live host. A screen capture of each of your two validations that you completed using the developer tools found in the Resources. Resources Using Arrays and Loops Scoring Guide. Microsoft Edge Dev Tools. IT3215 Web Site Zip Files. Chrome DevTools. Safari Web Inspector Guide. Toggle Drawer IT3215 Introduction to JavaScript Unit 03 Assignment Dynamic Images, E vents, and the DOM

Overview

Images, both static and dynamic, appear on most Web sites. There are many different features and functionalities that we can add through the use of JavaScript, including preloading, rollovers, and cycling banner ads. In this assignment, you will work with JavaScript, images, events, and manipulating the DOM to create an interactive image gallery.

Hint:

Preloading your images will only work on a hosting server and not your local drive, as there is no load time for your images locally. Once you have preloaded those images, you should clear your cache to test your loading of the images again. Tip: In a smaller JavaScript program such as this one, each function is created for a specific purpose. However, in more complex sites, it is better to build functions that are applicable to multiple situations. For example, rather than specifying an element name or ID, we can use a variable that is passed into the function. Directions Use the gallery.html and index.html files from the supplied course Zip file. Create

functionality using JavaScript on the following pages:

index.html Preload the images (banner1.jpg, banner2.jpg, and banner3.jpg in the images folder) for the banner at the top of the page. Create a cycling two-state banner that cycles every three seconds. gallery.html Preload the gallery images. Create roll-over functionality for each of the thumbnails in your image gallery. Use appropriate images found in the images folder. Write developer comments to describe the variables being declared and explain the functions and logical blocks of JavaScript code pertaining to the gallery. Make sure

to do the following:

Create an onpageload function to preload all of your images. Create a modularized function to cycle the homepage banner. Create a modularized rollover function for gallery images. Once completed, view your pages in each of your two selected Web browsers to see if the content renders appropriately and consistently within each. Next, verify that your code is error free using the appropriate browser specific development tool found in the Resources. Take a screen capture of each of your validation results and save it for submission.

Note:

Modularized refers to creating components that can be repurposed without significant changes to coding. Modularized components have no "hard coding" of image names, URLs, and so on, in the functions. Samples of modularized and nonmodularized JavaScript are provided in the Example Code file linked in Resources.

Submission

Requirements

Upload your Web site files to your Web host. Submit your

work in the courseroom using a single Zip file containing the following:

Your entire Web site including all associated files. A Word

document with:

The URL to your Web site so the instructor can view your site on a live host. A screen capture of each of your two validations that you completed using the developer tools linked in Resources. Resources Dynamic Images, Events, and the DOM Scoring Guide. Chrome DevTools. Safari Web Inspector Guide. Microsoft Edge Dev Tools. IT3215 Web Site Zip Files. Example Code. Toggle Drawer IT3215 Introduction to JavaScript Unit 04 Assignment Form Field Validation and Error Messages

Overview

You have created a basic form and added interactivity to images using JavaScript. Now it is time to validate information entered into your form fields. You will use the "registration.html" file found in your Zip file. You will see that the page has a form with the following fields to allow users to register for an account. The items in parentheses are defined formatting instructions to be observed for each field. Username* (must only contain letters and numbers) Password* (minimum of 8 characters) PasswordVerify* (minimum of 8 characters, must match password) FirstName* (text string) LastName* (text string) Email (uses xxx@xxx.xxx format) PhoneNumber (uses (xxx) xxx-xxxx format) SignUpNewsletter (radio box for yes/no)

Tips:

JavaScript is case sensitive, so a variable named myVar is different from MyVar and myvar. Perform your form validation testing as you go rather than all at the end. It will be much easier to fix the error if you have a smaller sequence of code to review. Directions Read the assignment overview. Use the registration.html file to add functionality to the form found on the page. The JavaScript that you write should validate each field and, if errors are made, display appropriate error messages that direct the user to complete the form properly. Once the form is completed, your script should open the confirmation page (confirmation.php). Note: The input fields in the form with an asterisk are required fields. Make sure

to do the following:

Write JavaScript that defines that a field is required and generates an appropriate error message if the field has not been completed. Write JavaScript to validate all input fields per the formatting definitions that the field values should be checked against (found in the overview) after each field. Write JavaScript that displays an appropriate error correction message (next to the field) in the event a form entry error has been made. Write a JavaScript that will default the user’s cursor to the first erroneous input field in the event that there is an input error. Create a submit button that executes the validation when submitted. Once completed, view your pages in each of your two selected Web browsers to see if the content renders appropriately and consistently within each. Next, verify that your code is error free using the appropriate browser specific development tool found in the Resources. Take a screen capture of each of your validation results and save it for submission.

Submission

Requirements

Upload your Web site files to your Web host. Submit your

work in the courseroom using a single Zip file containing the following:

Your entire Web site and all associated files. A Word

document with:

The URL to your Web site so the instructor can view your site on a live host. A screen capture of each of your two validations that you completed using the developer tools found in the Resources. Resources Form Field Validation and Error Messages Scoring Guide. Microsoft Edge Dev Tools. Safari Web Inspector Guide. Chrome DevTools. IT3215 Web Site Zip Files. Toggle Drawer IT3215 Introduction to JavaScript Unit 05 Assignment Query Strings and Storing Persistent Information

Overview

As Web forms get longer, we very commonly see them split across multiple pages to collect all of the necessary information. There are different reasons for this. A long form can be daunting for users and a large/long form can be difficult for users to fill out on a mobile device. These forms need to be designed so that the data entered by the user on the forms on each page will be submitted to the Web server simultaneously. This makes more sense as they are part of the same data set. The problem with stateless pages is that if the user moves from one page to the next, the data entered is lost. To bypass this issue, you will need to use query strings, hidden input fields, and cookies. In this

assignment you will use the previously created registration.html file to send

information to a second page named confirm.html. You will write a script on that page that will save the information from the form to a cookie and then display it on a same page. If the user goes back to this confirm.html page, the page should display the user form data from the registration entry that was last entered.

Tips:

o It will help to output the array into the browser console so that you can verify that the string is being correctly parsed. Details on the browser console can be found in the Resources. o To skip having to enter data into the form each time to test, it may help to create a JavaScript function that automatically fills in the fields for you and comment it out when completed. Directions Read the Overview. Modify the "registration.html" page created in the prior assessment to send a query (that has all input field information from that form) to a second page. When the user presses submit, all of the input fields from the registration.html form will be saved into a cookie. The user should then be forwarded to a second page (confirm.html (created by you)) that will read the cookie information and display it in a name/value pair using JavaScript. Make sure

to do the following:

o Create and integrate a script on the registration.html page passes all of the input fields from the form when the submit button is pressed. o Create a confirm.html page will read in the input from the query string data from the registration.html page and store them into variables first. o Write a script that runs in response to the submit event, that saves the input from the registration.html page to a series of cookies to store each input, and opens a second page called confirm.html that reads and displays information from all the fields. o Once completed, view your pages in each of your two selected Web browsers to see if the content renders appropriately and consistently within each. Next, verify that your code is error-free using the appropriate browser-specific development tool found in the Resources. Take a screen capture of each of your validation results and save it for submission.

Submission

Requirements

o Upload your Web site files to your Web host. o Submit your work in the courseroom

using a single Zip file containing the following:

? Your entire Web site and all associated files.

? A Word document with:

? The url to your Web site so faculty can view your site on a live host. ? A screen capture of each of your two validations that you completed using the developer tools found in the Resources. Resources o Query Strings and Storing Persistent Information Scoring Guide. o Microsoft Edge Dev Tools. o Chrome DevTools. o Safari Web Inspector Guide. o IT3215 Web Site Zip Files.

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IT3215 Introduction to JavaScript Unit 01 Discussion DQ1 Getting Started With JavaScript JavaScript has been one of the most popular scripting languages for dynamic interactivity. It is a completely different language from HTML5 and CSS3, and it can be challenging for those without programming experience to begin. Research and describe some tips 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) for each:

Explain how different browsers handle JavaScript code. What considerations must be made when developing for different browsers? Describe the use of JavaScript comments, including the process of "commenting out" portions of JavaScript code. Explain the primary rules for creating a JavaScript identifier. Explain the use of variable declarations and assignment statements with numeric, string, and Boolean data. Explain the syntax for referring to a method or property of an object. Explain the issue of cross-browser compatibility as it relates to JavaScript code. Describe the creation and use of event handlers, including an event handler for the load event of the window object and how the HTML and JavaScript sections work together using the DOM. Describe how the process flow for form submissions works between HTML, JavaScript, and a server-side language like PHP. Response Guidelines Comment on the post of at least two other learners. Offer insights, solutions, examples, or opinions that add depth and value to the conversation. Note regarding discussions in this course: The discussion topic should determine the length of your post, however, a minimum of 150 words is recommended. Refer to the Discussion Participation Scoring Guide for post expectations. Make your initial posts by Wednesday to allow time sufficient for peers to respond. The expectation within the course discussions is to respond to at least two posts by the end of the unit, but it is highly recommended that you extend the dialog further. Responding over multiple days will help stimulate a lively discussion. Learning Components This

activity will help you achieve the following learning components:

Study the different variable data types. Examine the process flow of form submissions. Understand the basic concepts of the DOM and how HTML and the JavaScript sections of the DOM work together. View examples of effective JavaScript comments that describe and explain variables and functions. Resources

Discussion

Participation Scoring Guide. Toggle Drawer DQ2 Challenges to Using Variables in a Form Note: The second discussion in each unit of this course is dedicated to community sharing of challenges and solutions 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! Creating and employing variables for the first time can be tricky. Putting them in a form can make it even tougher. For some it is very intuitive; for others, less so. 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 your fellow learners address their challenges. Resources IT3215 Introduction to JavaScript Unit 02 Discussion DQ1 Arrays, Loops, and the DOM You have learned about working with the DOM with CSS, but you can also work with the DOM using JavaScript. You will be able to alter and manipulate the DOM dynamically with JavaScript to extend basic JavaScript functionality by using loops, events, controls, arrays, and functions. Research and describe some tips 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) for each:

Explain how arrays and loops be utilized effectively together versus separate variable declarations. Describe the flow of control for while, do-while, and for loops. Describe the use of a JavaScript array, including the use of its index and length property. Describe these methods for working with forms and controls: submit, reset, focus, blur. Describe the use of the Document Object Model in JavaScript applications. Describe these events for working with controls: onfocus, onblur, onclick, ondblclick, onchange, onselect. Describe the process of creating and adding nodes to the DOM, including adding rows and cells to a DOM table. Distinguish between a function expression and a function declaration, including which one can be called before it is defined. Response Guidelines Comment on the post of at least two other learners. Offer 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:

Understand how to dynamically add HTML elements to an existing page by manipulating the DOM. Examine when arrays are utilized. View examples of effective JavaScript comments that describe and explain variables and functions. Know the difference between an array and a variable. Understand the different types of loops. Resources

Discussion

Participation Scoring Guide. Toggle Drawer DQ2 Challenges to Arrays and Loops 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! Creating and employing arrays and loops can be challenging. For some it is very intuitive; for others, less so. Discuss one or more of the challenges or experiences that you encountered when trying to complete the assignment this week. 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 them address their challenges. 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, creating 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 IT3215 Introduction to JavaScript Unit 04 Discussion

DQ1

Validating Form Input Data Working with and processing bad data generally means that a lot of work will have to be done to clean up the data on the back end. To avoid the processing of bad or incorrect data, we incorporate form validation into our Web pages. There are numerous levels of data validation, from ensuring that input fields are not empty to ensuring the user data entered conforms to a specified format. Research and describe some tips 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:

How can we set the focus to certain form elements? How do you check for empty input fields? What is the purpose of using client-side validation versus server-side validation? Explain. How does a JavaScript function validate numeric and alphabetic inputs in specific fields? How are regular expressions used to match patterns with strings? How can a regular expression be used to validate data such as a Social Security number? Under which circumstances would you use a validation loop? Why is client-side validation prior to sending data to the server important? What is the potential problem of overly specific form validation? How are the + operator and the \n escape sequence used when working with strings to manipulate the DOM to add messages for errors? Response Guidelines Comment on the posts of at least two other learners. Offer 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:

Understand how to set focus to certain form elements. View examples of effective JavaScript comments that describe and explain variables and functions. Understand how to check for empty input fields. Understand how a JavaScript function validates numeric and alphabetic inputs in specific fields. Resources

Discussion

Participation Scoring Guide. Toggle Drawer DQ2 Challenges With Form Field Validation and Error Messages 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! Field validation and its associated error messages are at the heart of creating an effective form. It is important to both understand what information is required in a form (and in which format), and anticipate the user's experience. 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 posts of at least two other learners. Share suggestions to help them address their challenges. Resources IT3215 Introduction to JavaScript Unit 05 Discussion

DQ1 Cookies:

Storing and Passing Information On their own, HTML and CSS are unable to store user information, so once the Web browser is closed, any user information is lost. Cookies, Web storage, and sessions are workarounds for this shortcoming. Research and describe some tips for someone new to JavaScript to get begin to work with user information storage. In particular, focus on at least two of the following points while providing

sample code (with comments) of each:

o Identify which storage situations would be best resolved with sessions, local storage, and cookies to store persistent data. o Distinguish among session storage, local storage, and cookies. o Describe how to create, read, and delete cookies with the document.cookie property. o Explain how to parse a cookie string. o Describe the visibility, scope, and lifetime of a cookie. o Explain how cookies can create a customized user experience. Response Guidelines Comment on the posts of at least two other learners. Offer 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:

o Examine how to store, retrieve, and pass data through query strings. o Examine how to dynamically store data into hidden input fields. o View examples of effective JavaScript comments that describe and explain variables and functions. o Understand how to store data and retrieve data from cookies. Resources o Discussion Participation Scoring Guide.

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DQ2 Challenges with Query String and Storing Persistent Information 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! Modern Web sites rely increasingly on processing queries. Saving that data and passing it along to other Web pages is just as important. 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 posts of at least two other learners. Share suggestions to help them address their challenges. Resources o Discussion Participation Scoring Guide.

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Updates and Handouts Periodically, information will be posted in this space for the good of the class.

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Ask Your Instructor This forum was created to provide a convenient space for you to ask questions—questions about particular assignment and discussion activities, questions about the course in general, questions about expectations. If there is something that you feel you could use help with, please post your question here. Most likely, some of your classmates will have the same concern, so your post may help several learners. If you feel your question is private, please use the Messages tool found under Notifications.