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So far in this section,

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you learned how to require

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Node JS core modules.

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How to require your own modules.

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And so in this video,

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you're gonna learn how to require

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third-party modules from the NPM registry.

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Actually requiring a module

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that we already installed from NPM

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is really, really simple.

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So again we do all the requiring

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at the top and usually we require

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the core modules first,

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then the third-party modules,

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and then our own coming from

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our local file system like this.

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So the one that we are going to require

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is called slugify.

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Remember?

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This is the one that we installed

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in the previous lecture.

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And all we have to do to require it

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is to just like before

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use the require function

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and then simply the name of the package.

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And then OGS will automatically know

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that it will have to go into

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the node modules folder.

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So this folder where all the dependencies are,

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and search for that module there.

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Okay?

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So again this will then return a variable.

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And so we need to save that into a variable.

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And I'm calling it slugify here just like this.

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Okay?

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And so slugify will be a function,

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which we can use to basically create slugs.

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So again what is a slug?

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Well slug is basically just the last part

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of a URL that contains a unique string

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that identifies the resource

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that the website is displaying.

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So for example,

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in our node farm let's say

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that where we opened this avocado

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instead of having this ID equal zero

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we could have something like

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(clicking) fresh avocados, okay?

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And so this part here

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or actually just this part

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so this would be the slug.

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So it's basically this name here

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and then based into a unique string like this.

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And I'm sure that you have seen this

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all over the place like in blog posts.

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It's very common to do it like this.

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Or really anywhere where we do not simply want

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something like this.

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Okay?

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So ID equals one.

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Or we could also just use

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for example in this case here

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goat and so on and so forth.

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Okay.

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I'm not gonna run a tab on the entire name.

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But the idea is to use a slug,

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which is this so a unique string

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instead of just a number

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which is not meaningful to us at all.

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Now let's say this is the first time

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that you're using the slugify package.

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And so in order to figure out

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how it actually works

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we can search for the documentation

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here on NPM.

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So we just put the name of the package here.

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Then search for it.

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And so this is the one that we did install.

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All right.

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So we already did this part here.

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So requiring the module or the package here.

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And then down here we can see

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how we used it.

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So all we have to do

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is to use slugify as a function

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and then pass in a string.

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Then down here you see the options.

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And for example we can specify the replacement.

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So basically what the empty space

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will be replaced with.

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And usually that's this dash.

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So just like I was typing here.

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But we can specify something different

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like an underscore or nothing at all.

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Okay.

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Here we can specify that we want

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everything in a lower case.

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And so let's actually go ahead and do that

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now in our code.

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So we have slugify here

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and now just to test it

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let's do it here before we create the server.

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Console at log.

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Slugify to string.

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Fresh avocados and then I'm gonna specify

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the option that I just showed you,

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which is lower case

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and set it to true.

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Give it a save

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and remember that now no longer

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we have to close the app

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and restart it again.

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Node man does that automatically for us now.

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And so down here you already see fresh avocados.

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I simply did some mistake here.

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So it's lowercase.

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But it's still not working for some reason

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so let's go back here.

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Oh I see.

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It's actually just lower.

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But that's exactly what

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the documentation is for.

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So for us to see how something really works

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so that we can use the package

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correctly in our code.

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And so just like this,

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I created a slug out of

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our initial fresh avocado string.

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Let's now just do that for all of our products.

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So they are in data object.

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So let's create an array of all the slugs.

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So slugs.

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So data object dot map.

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And so this is again just regular JavaScript

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so that shouldn't be nothing to you.

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So we're looping over the data object

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and then create a new array based on that.

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And in each iteration what we're gonna do

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is to take the element

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and then create a slug out of that.

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So slugify element dot product name.

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So remember that is where

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the name of product is.

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So here you see product name.

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And so then this object.

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And let's actually log that one to the console.

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And indeed here we go.

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So these are our six slugs

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or actually just five

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out of our five products.

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All right.

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And so this is how we include

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a third-party module.

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Take a look at the documentation

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and then use it actually in our code.

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Okay.

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So this slugify is now a dependency of our code.

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Because without that package

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this piece of the code here

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would now no longer work.

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Right?

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So our code now depends on having

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the slugify package installed in the project.

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Now we could go ahead and actually store

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these slugs here into the data json

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and then build the app

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so that instead of the ID

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it displays the slug in the URL.

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But I'm not gonna go ahead

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and do that here because

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that's just using the same concepts

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that we learned before all over again.

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And so that doesn't add nothing new.

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All I wanted to do in this video

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is really to show you this process

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of integrating a new package into our code.

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Taking a look at the documentation,

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and then just do a simple example

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with that new module.

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So that was the goal of this video.

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That is completed now.

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And so let's now move on

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to the next one.