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[MUSIC]

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Hi, I'm Laura, an instructor
here at Treehouse, debugging.

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It's an essential part
of being a programmer.

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We've all been there spending hours
tirelessly hunting down those

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elusive bugs.

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But you know what?

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That feeling of triumph when you finally
conquer them is absolutely priceless.

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However, I understand that sometimes
you're in a time crunch or

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simply need some extra help.

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That's where ChatGPT comes in.

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Say hello to your new debugging companion.

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Whether you're a seasoned developer or

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just starting on your coding journey,
ChatGPT is here to lend a virtual hand,

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helping you navigate those pesky
issues that can slow you down.

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In this video, we'll ask ChatGPT
to help us debug an RSVP app.

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If you'd like to follow along, make
sure to download the project files and

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open them up in your favorite text editor.

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Let's get started.

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Currently, we're dealing with five
bugs that are causing unexpected

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behavior in our RSVP app.

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Bug number one, when I check or

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uncheck the check box to confirm a guest,
nothing happens.

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Ideally, the list item should
highlight when confirmed, and

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lose the highlight when unchecked.

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Moving on to bug number two, clicking
the checkbox to hide those who haven't

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responded doesn't work as expected.

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Instead of hiding unconfirmed guests, it
incorrectly highlights them as confirmed.

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Now let's address bug number three.

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Whenever a new name is omitted,

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it mysteriously appears as text
instead of the actual name entered.

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Definitely not the behavior
we're aiming for.

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Which brings me to bug number four.

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When I click the Edit button
to update a guest name,

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the original name doesn't
appear in the input field.

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This can be confusing and
needs to be more user friendly.

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Lastly, we have bug number five.

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Clicking the remove button
throws an error in the console.

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Yikes, we definitely need to fix that.

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Now, here's where ChatGPT
comes to the rescue.

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We'll leverage the power of ChatGPT
to assist us in locating and

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resolving these pesty bugs.

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When debugging with ChatGPT,
it's important to strike a balance between

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providing enough information and
avoiding overwhelming it.

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My preferred approach is to
begin by describing the bug.

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For example, I'm facing a bug in my code
where nothing happens when I check or

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uncheck the checkbox to confirm a guest.

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I expect the list item to
highlight when confirmed and

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lose the highlight when unchecked.

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To help ChatGPT pinpoint the bug and
provide specific guidance,

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I'll share the relevant code.

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In the app.js file, I'll copy
the event listener responsible for

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handling the confirm checkbox.

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And say to ChatGPT,
here's the event listener that handles

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a confirmed checkbox,
followed by pasting the code.

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Considering that this bug has something
to do with how I interact with the HTML,

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I'll also share a sample
of the HTML code for

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the list item from the index.html file.

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I'll copy one of these list items and
tell ChatGPT,

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here's a sample of how
the HTML looks like for

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a list item, and paste the HTML code.

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Let's take a look at ChatGPT response.

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It also believes that my
code seems correct but

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offers some pointers on what
to investigate further.

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Firstly, suggest ensuring that the ul
variable is correctly assigned.

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However, this cannot be the issue
because I have other event

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listeners on the ul variable
that are functioning properly.

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Next, ChatGPT suggest verifying
that the event listener code

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runs after the ul tag has
been loaded into the DOM.

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Since the ul tag is in the HTML file,
which loads before the JavaScript,

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this cannot be the cause
of the problem either.

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Lastly, it recommends checking the CSS
styles for the responded class.

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However, this cannot be the issue because
our app initially loads correctly with

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the confirmed guests highlighted and
the unconfirmed guests not highlighted.

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Unfortunately, these suggestions
don't provide a solution.

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However, ChatGPT does
provide a working example,

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let's compare their
JavaScript code to ours.

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Immediately I noticed that the list
item variable in their code has

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an extra .parentNode at the end.

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Let's add that to our code.

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So on line 81, I'll add.

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parentNode and save the file.

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Now I'll reload our RSVP app, and test
to see if this modification fix the bug.

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Fantastic.

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When I uncheck the confirm box,
Ruby loses its highlighting, and

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when I check it again,
the highlighting comes back.

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Since ChatGPT didn't identify this
mistake, I'll let it know about the error

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and ask for an explanation of why
this modification resolved the issue.

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None of the suggestions you
provided resolved my bug.

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However, I noticed that in
the working example you shared,

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the list item variable
had an extra .parentNode.

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I added that to my code and
it fixed the bug.

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Why did adding the .parentNode to
the listItem variable solve my problem?

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It apologized for the oversight and

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proceed to explain why adding
the .parentNode fix the bug.

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It turns out that since the checkbox was
inside a label element, my original code

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was mistakenly adding the responded class
to the label tag instead of the li tag.

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This clarifies why the highlighting
behavior wasn't functioning as expected.

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So by adding the.parentNode twice,
you correctly navigate from

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the input element to its parent label
element and then to the li element.

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All right, let's do this again and
as ChatGPT to help us with the next bug,

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where the invitees aren't filtered when
I check those who haven't responded.

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Like we did before, I'll start by
letting ChatGPT know what our bug is.

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I have another bug in my code.

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When I click the checkbox to hide those
who haven't responded, instead of hiding

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all the invitees who haven't responded,
it highlights all invitees as confirmed.

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Let's now give ChatGPT the code
associated with this bug,

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in app.js, I'll copy the event
listener that filters out

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guests who haven't responded and
tell ChatGPT.

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Here's the event listener that filters
out the guests who haven't responded and

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paste the code underneath.

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This time ChatGPT was able to
immediately point out my mistake.

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It indicates that the issue
is in the if statement or

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I check if the list item has
a class name of responded.

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In the if statement,

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I'm using the assignment operator
instead of the equality operator.

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This explains the bug.

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I was accidentally adding the class
name responded to every list item,

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which explains why all invitees were
highlighted when I clicked the checkbox.

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Instead, I should be
using three equal signs

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to properly check if the list item
has a class name of responded.

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Now let's save our changes and
check if this resolved our bug.

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I'll refresh the page and
click the checkbox.

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Nice, it worked like a charm.

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The unconfirmed guests
are now hidden as expected.

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And when I uncheck it,
all invitees appear.

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Let's continue our debugging
journey with bug number three.

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Whenever a new name is submitted,

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it reads as text instead of the actual
name entered, I'll go back to ChatGPT and

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write another bug in my code is when
I add a new invitee to the list.

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The name appears as text
instead of the name submitted,

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here's the function in my code
that creates a list item.

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And in app.js I'll scroll down and
copy the function that

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creates a new list item and
add it to our ChatGPT prompt.

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All right, according to ChatGPT, the issue
in my code is when I create the span

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element for the invitees name,
it seems that I accidentally set the text

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content to the string text instead
of using the actual text variable.

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Oops, let's fix this mistake.

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So on line 59,
where I'm creating the span element for

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the invitees name, ChatGPT is correct
in pointing out that I'm passing in

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the string text instead of the variable
text that the function takes in.

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I'll remove the single quotes
around text and save the file.

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Now let's go back to the RSVP app, refresh
the page and add bro to the invitees list.

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It worked perfectly.

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Moving on to the last two bugs.

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They involve the edit and remove buttons.

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Currently clicking the edit button
displays an empty input field, but

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what we actually want is for

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the person's name to appear in the input
field to provide easier editing.

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When attempting to remove an invitee,
it seems nothing happens on the surface,

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but if we check the console,
an error is thrown.

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This is our first bug
that throws an error.

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This additional information should
help ChatGPT in pinpointing the issue.

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I'll copy the air for reference.

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Fortunately, both the remove and

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edit buttons are implemented
under the same event listener.

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This gives us an opportunity to test
if ChatGPT can help us solve both

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bugs in one prop.

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I'll tell ChatGPT there
are two more bugs in my code.

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When I click the Remove button I get
this error and paste in the error.

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Two when I click the Edit button
the input field is blank instead

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of displaying the name of the invitee.

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Now in App.js,
I'll scroll all the way down and

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copy the entire event listener that
handles the remove, edit and save buttons.

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Back in ChatGPT, I'll add to the prompt.

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Below is a code that manages both of
these buttons and paste the code below.

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All right,
let's address the remove button first.

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ChatGPT suggests modifying the remove
action to remove the parent ul element,

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which doesn't seem right.

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Removing the ul element will
remove all invitees from the list,

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which is not the desired behavior.

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If we want the Remove button to remove
only the specific invitee associated

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with it.

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We'll provide ChatGPT with more
information about this bug shortly, but

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let's see what it suggests for
the edit button first.

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ChatGPT points out that the reason the
edit button isn't functioning correctly

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is because I'm setting the inputs
text content property instead of

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the value property.

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Let's give this a try, on line 106,

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I'll make the change from
input.txt content to input.value.

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I'll save the file and
check if this resolved the issue.

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When I click the Edit button now
the name appears in the input field.

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Great.

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Now let's return to
the Remove button issue and

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provide ChatGPT with more information.

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I'll type, your suggestion for
the edit button issue worked, but

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your suggestion for
the remove button issue did not.

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I do not want to remove the ul element.

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I want to remove the li element,
that is the parent of the button element.

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Here's the JavaScript code again.

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I'll copy the event listener once more and
paste it into the prompt.

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To provide more context, I'll also
share a sample of the HTML structure.

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I'll add, and here's a sample of the HTML.

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In the index.html file, I'll copy the ul
tag along with the first list item.

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I'll paste them into the prompt and
include the closing ul tag.

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It apologized for the confusion and
now it suggests rather than passing

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the li as an argument, I can directly
access it within the function.

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Let's give this a try.

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On line 99,
I'll remove the li parameter so

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that we're referring to the li variable
defined outside of the function.

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I'll save this change.

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Back in the RSVP app,
I'll refresh the page and

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attempt to remove Ruby from the list.

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It worked like a charm.

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Fantastic.

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And there you have it folks
with ChatGBT guidance,

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we successfully debugged our RSVP app.

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Now it's important to note that debugging
with ChatGBT may require a bit of back and

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forth.

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If ChatGBT doesn't get it right
on the first try, don't worry.

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Describe your bug in a different way and
provide additional information.

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In case ChatGPT suggestions
still don't address or issue,

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here's one of my favorite tricks.

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Simply close the chat and start a new one.

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Since ChatGPT can remember chat
history starting fresh can

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often help resolve any hangups.

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Remember, the key is to work with ChatGPT

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as if it's another developer
helping you debug.

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If you don't fully understand why
a particular suggestion fix the bug

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don't hesitate to ask ChatGPT for
an explanation.

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If you'd like to see how we would
debug this RSVP app in the browser,

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check out our debugging JavaScript
in the browser workshop.

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Additionally, if you're interested in
building the RSVP app or exploring more

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DOM scripting examples, are DOM scripting
by example course is a fantastic resource.

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I added a link to both in the teachers
notes, happy coding and happy bug hunting