• Some JavaScript tutorials
• The complicated resources in the You Don't Know JS series, including your reading last week
• A resource for CSS/style/colors
• An excerpt from a specific workshop site (for a different audience than yourselves) which addresses some common questions about jQuery
• The simple JSFiddle example from class
• A W3Schools resource on JavaScript output
• Google, Piazza, your classmates, office hours, lab time!

• This README.md, which you should edit with answers to the questions
• jsPracticeLab.html, which you'll need to edit and try out
• jquerylib_submit_example.html, which you'll need to edit and try out

The aim for this lab is to practice adapting to and understanding code in a new-to-you (or not) language and its own libraries/packages -- JavaScript, in this case.

The programming skills you have built up till now are useful for Python programming, but, more than that, they extend to fundamentals of many kinds of programming.

This experience is not in any way about becoming an expert JavaScript programmer. Instead, it is about using what you do have experience with -- and your skills in learning new things that relate to programming -- in order to make educated judgments about some brand new-to-you code, even if you haven't learned in detail about it yet. That's part of what being in technology -- or even technology-adjacent -- will often mean.

Below are a bunch of questions and indications of things to do. For each indication of something to do with code, there is also an accompanying question to answer or brief explanation to give.

To complete and submit this assignment, you should:

• Fork (and clone) this repository
• Add our instructional team as a collaborator to your fork (see instructions for adding collaborators on Canvas)
• Edit this README.md file with answers to the questions/prompts, briefly, using Markdown formatting so that the questions appear in bulletpoints and the answers appear clearly below each respective question, not as bulletpoints.
• Add all names of those who worked on this (as indicated below)
• Make the changes that are indicated below to each of the .html files with JavaScript programs provided. (You'll probably do this concurrently with answering questions)
• Commit (as you go) and push your changes to all three files to your GitHub forked repository.
• Submit a link to your repository on Canvas. (This HW doesn't have an autograder -- it will be graded by hand/by humans this time.)

• You are more than welcome to work together on this, but you must each submit a repo to be graded on it, so if you do work together, you should do the following:

  • Make sure each one of you understands all the work -- YOU are responsible for using and knowing this information
  • Write each person's name & uniqname who worked on the assignment together on your submitted README.md file (you'll see a space for this below)

• In answering questions, please make sure the formatting is clear to read and that you have updated the names of everyone who worked with you, with your name first (see below).

• In answering questions, assume all of the questions include a explain briefly note -- you do NOT have to, and should not, write extended paragraphs. Be as concise as you can and explain in your own words. Don't worry about "whether it's enough" -- just worry about conveying your understanding so you can read it later, or even give it to someone else, and the answers will help/make sense.

• It is not acceptable to copy and paste answers from the internet and submit them as your own. If you cite things, make sure you provide a citation, including to links. If you get information from a resource and rephrase it so you're basically explaining an idea, that's just fine for an explanatory purpose in this assignment, but you must cite any quotes or examples that aren't yours.

• For grading: we are grading on...

  • Following the instructions
  • Approximate correctness of the code edits
  • Careful & clear answers to the questions
  • Correct answers to the questions
  • Slightly more than half the 1000 points will come from answering the questions. The rest will come from your edits to the code.

• List everyone's names and uniqnames who have worked on this assignment with you, including your own name, but make sure YOUR name is first and bold
• Like this:
• Kim Vuong (kvuong)
• Radhika Sondhi (rsondhi)
• Shannon Weber (webersh)
• Cassandra Eddy (cikeddy)
• Salma Siddiqui (salmasid)
• Min Jin Kim (minjin)

• This is just an example question.

This is what an example answer should look like. If you want to include some code, which you probably don't have to do, you can, like this:

Some JavaScript code

• What does a code comment look like in JavaScript? What character/s do you have to put before a comment? It is italicized and grayed out. // are used before the comment.

• Explain what needs to happen to get a JavaScript program to "run", given the JavaScript you've seen in this assignment. Put a script tag in and write it in the script, curl brackets, and a closing tag (Example: lines 7 and 34)

• What functions in JavaScript seem to be similar in function to the print function in Python? (There are two.) Why might you use one and not the other? Explain briefly. Console and alert. Console is something that runs in the backend where one has to Inspect to see it. Alerts pop up on the page and the user must click OK to continue.

• What code would have to comment out to get rid of the pop-up box when you load the page? (Related to the last question.) Do that in the code file, and then, add code so that a text box will appear that contains the current date and time! HINT: Look through the rest of the code first... alert("hello"); would need to be commented out.

• How can you put your own name at the top where it currently says "A name"? Explain very briefly how to do so, and replace A name in the web page with your own name. Go to line 17 and where the string says 'A name', replace that with my name, 'Kim'.

• What does the word document represent in this code? Explain briefly. It represents the page that is going to be displayed on the web browser. It is the entire page.

• What is happening in line 12 ( document.querySelector('#items').innerHTML = document.getElementsByTagName('li').length )? Explain, briefly (<= 2 sentences). The code gets the length of all list items on the page (all elements with 'li').

• What color would the background of this page be if there were no JavaScript in this page? White

• Why are there a couple of gray boxes on the screen with a different colored border? How could you edit this code to make them a different color? Explain briefly. Then edit the code to make those boxes some shade of blue, of your choosing. There is code for the border element that paragraphs are set to, which is gray. A new color can be selected for the paragraph border element, which can be done in JavaScript or CSS. On line 39, I replaced the code for white to 33A4FF for a blue.

• Edit the code so that, if you highlight McGill University and copy it, you see the text O Canada near the bottom of the page. Briefly explain why you made the edits that you did -- how did you know/figure out what to do? I added the code:

function copyFunction2(){
	document.querySelector('#cheer').innerHTML += "O Canada<br>";

by the other functions and

oncopy="copyFunction2()"

in front of McGill University. I looked at the code where "Go blue!" was and modeled the "O Canada" after that. Then I identified at "McGill University" to use the same code as what was in "University of Michigan" to get the action of copying the text in the browser to show "O Canada"

• In the original code, when you click the button that says Wow, you see a text box! Wow. Explain briefly in your own words why the following code causes that to happen:

function handleClick(){
	alert("hello");
}

and

<button onclick=handleClick() id="wow-button">Wow</button>

The first line of code is the action of clicking and having the alert (text box) pop up saying "hello." The second line of code is embedding the handleClick function into the Wow button so that when the user clicks on the button, he or she receives the textbox with "hello".

• Knowing what you learned from the previous question, add code/markup to the jsPracticeLab.html file so that there is a button with the text Spring Equinox 2019 on it somewhere on the page, and when that button is clicked, a text box containing the text March 20, 2019 appears. (There's no function -- that I am aware of -- to automatically get this info, you've got to type it yourself.)

• Check out the file jquerylib_submit_example.html. This is an example of code that uses a package called jQuery (and this will need you to have an internet connection to run it properly, although the other file does not). Check out resources above for more on jQuery!

• When you enter input that isn't valid, you see an error that is red. Why is the error in red? Why is the response for valid inputs blue? The error is in red because if the value entered is not one word, the style type notes for the "Not Valid!" to show up in red font. For valid inputs which are one word, the style type notes for it to show up in blue font.

• What is this line var regex = /^[a-zA-Z]+$/; helping with? And if you googled something to figure that out, what did you google, and what, briefly, did you learn? (If you didn't need to google, you can leave that out, but explain briefly what that line is helping the program do, anyway.) The line is a regular expression for input that includes only capital and/or lowercase letters and no other characters. It helps figure out if the input is one word or not.

• What's different about the syntax of conditional statements in JavaScript, compared to Python? JavaScript requires the {} instead of the : in Python after the if/else lines of code and a ; at the end of each "return statement".

• What do you think the 10000 refers to in the code .fadeOut(10000)? How long the message after the input is submitted is displayed for in milliseconds.

• What do you think is going on with the following code at the beginning of the program? Note that the most important thing to do for answering this question is to be thoughtful and clear, not to be absolutely correct:

$(document).ready(function(){
    $("form").submit(function(event){

The code is for setting up to check if the page is ready for JavaScript to run in the first line of code and for the form element to be available to be submitted.

• Add some code to the jquerylib_submit_example.html file so that, if the input is valid and is specifically the text hello, rather than the visible output being Nice! in blue, the visible output should be Hello to you too!, also in blue, just like Nice! is.
  • HINT: You'll have to make some changes to the conditional statement, and possibly look up some JavaScript conditional syntax. You'll also need to look carefully at what generates visible output right now.