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One Solution
6:20This video covers one solution to the challenge.
How'd you do?
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If you got them all,
great, very well done.
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If you found these challenging or
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didn't get to every solution,
that's totally okay too.
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It'll get easier with practice, and
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sometimes just the act of seeing how
others go about solving a problem
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can really help you learn how
to approach problems yourself.
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So let's dive in.
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The first challenge says, hide/show
the text inside the of the #helpText
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span element when the user's mouse passes
over the text, How are these ranked?
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Hint: use the jQuery toggle method.
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Let's look at these elements in the HTML.
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Here's the helpText paragraph.
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You can see it has an id of helpText.
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And here's the span
element nested within it.
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The element on which we want to listen for
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an event is the element
with the id of helpText.
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So let's start by selecting that.
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Now let's determine which
event we want to listen for.
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Our hint is right here.
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When the user's mouse passes over
the text, how are these ranked?
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The event we want to use
is called mouseover.
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So we could do this and
that's a perfectly acceptable answer, but
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I'm going to use the on syntax.
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Now that we're listening for
a mouseover on the helpText paragraph,
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what do we wanna do when this event fires?
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We wanna use the toggle method to show and
hide the text within the span element.
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I'll start by selecting the text
inside of the span element and
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then I'll use the toggle
method on my selection.
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So I'm selecting this span element.
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And toggle.
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Let's refresh and
see if this works And it does.
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The second challenge reads, append a new
restaurant to the restaurant list when
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the user enters a value into
the new restaurant input and
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clicks on the add new button.
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So when this button is clicked,
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we need to get the value of this input and
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append it to this list.
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Here's how I did that.
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So I got the value from the input,
saved it to a variable, and
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then used the append method to append the
value of this input to the unordered list.
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Let's go ahead and save and
refresh and see if this works.
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And it does.
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But you may have noticed a small problem.
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If we put something else here, if I append
just the text that's in this field,
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I'm not actually appending
a new list item.
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I'm only appending more text.
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So we can use string concatenation
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to add list item tags to
an item before we append it.
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Now we can add new items to the list and
they will format correctly.
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And, of course,
it's also fine if you use ES6 syntax,
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which would look something like this.
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And you can see that works just the same.
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Now let's see what I did for
the third and final challenge.
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Which reads,
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add the class strike to the restaurant
name each time it's double clicked.
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Use event delegation on
the ul element to listen for
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a click event on the ul's list items.
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I use event delegation here so
that we're listening for
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a double click on any list item
with the unordered list element.
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Then I pass in the event object.
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Inside the event handler I
select the target of the event.
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So the particular list
item that was clicked on.
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Finally, I use the addClass method
to add the class of strike.
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So let's save and test this.
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And great, that works.
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As a bonus I asked you to refactor
it using the this keyword.
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As well as look up a method to
toggle the class on and off.
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With some quick googling,
you can find a method called toggleClass.
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So we can get rid of the event object
right here cuz we're not gonna use it,
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and replace the selection
with the this keyword.
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Then instead of addClass,
we can use toggleClass.
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Now if we refresh, you can see that
you can toggle this style on and off.
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Same goes if you add another restaurant.
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Really great work.
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These were challenging exercises,
so if you got some, most, or
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all of them, be proud.
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Remember, you may have approached
these problems differently, and
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that is totally okay.
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There are often many solutions
to a coding problem.
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Keep practicing, and
I'll see you next time.
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