Deno Tutorial #4 - 3rd Party Modules

Key Takeaways

all right then gang so we've seen now how to use the standard libra here and the different modules in dino but there's also many more modules which are not part of the standard library third-party ones and you can find those over here by clicking on third party modules now there's a lot of different modules for many different things here for manipulating dates for terminal colors for api frameworks etc we're going to look at a couple of them in this lesson now first up we're going to look at one called denon or denon and this right here is for dino a bit like what nodemon was for node js so it watches all of our files and it restarts the server to pick up changes to our files when we make them so we don't have to keep typing dino run sandbox.ts with all those different flags as well every time we make a change to our code it's going to automatically pick up that change and restart the server for us so let's go down here and see how to use it or install it rather so it's this big long command right here so let me grab that and come over to the terminal now in our case we're not actually importing it into a file like we did with other modules before we're installing something onto our computer so we just need to run this down in the terminal so i'm going to cancel out of the server process and clear this terminal then i'm just going to paste this in and we can see right here this install command so this is installing this package right here okay now you can see we have allow read allow run and allow right and also we have this unstable flag which means that this package is still unstable so it might not always work as you expect it to and there might be some changes but nevertheless for this tutorial we'll just install it and see how it works so that's just going to download the required files and at the end of this we can now run dnon or denon commands so instead of running dno run and then the file we just say denon and then run and then the file we want to run and we also have to pass the flags so in our case we want to use the network so we need allow net so hyphen hyphen allow hyphen net then the name of the file which is sandbox dot js press enter this is going to do the same thing as before oops except it can't find sandbox.js and that's because stupidly i've used the js extension not the ts1 so let's just do that again so dot ts and now it runs this file the same way as when we said dino run but this time now when we make a change we don't have to cancel out the process and restart the server by re-running the file it's going to watch our file and it's going to automatically restart the server whenever we make a change so if i make a change now for example by saying console.log and then saying down here request made like so if i save watch what happens down here save it and it detects that change and it restarts the file for us okay so it picks up on that change and now if i go over here and refresh then we're gonna see request made so this is working without us having to cancel out the process and re-run the file which is pretty awesome so let's try that again hello again ninjas and save it and refresh over here and we should see hello again ninjas so that's a nice little third-party package we can use to automatically restart or rerun our files when we make changes and then save them okay then so next up we're going to look at another third-party module which can be this time added to a specific project instead of just installed onto our computer and the module we're going to look at is called case so this right here this module basically gives us utility methods to change the casings of strings and if we scroll down here we can see some examples of the different types of casings we can use in the available methods so we can make something camelcase a constant case dot case etc so let's first of all import this into our project i'm going to grab this and i'm going to comment out all of this stuff for now and paste this input down here now instead of just using camelcase i'm going to use a few different methods from here which i'm going to paste in and i got these from my repo so camel case param case pascal case and snake case and let's take a look at how these work with a string so first of all create a string and i'm going to call it text if i can spell it and inside here i'll say hello again ninjas very original so now i'm going to use each one of these in turn and i'm going to store the result in a different variable then at the end we'll log all of those different variables out so for example i'm going to say const camel and set that equal to camel case and we're going to pass in the string text now i'm going to do the same thing for each one of these different methods so let's say const param is equal to param case and pass in the text and then after that we'll do pascal case so const pascal and set that equal to pascal case and pass in the text and then finally we need snake case so we'll say const snake is equal to snake case and pass in the text now finally i just want to output each one of these to the console so let me say console.log and we'll output first of all camel then param then pascal and then snake alright so if we run this it's going to import this for us so that we can use these methods inside this file and then hopefully all of this will work fingers crossed so let me come over here and i'm going to cancel out the process in fact i don't need to because we're still using dnon and we can in fact see that even when we save this it re-ran the file and we can see all of those different variables output right here so this is camelcase which looks good this is the param case where we have hyphens instead of spaces and then after that we have pascal which is this a bit like camelcase but it starts with a capital letter instead of a lowercase letter and then finally snake case which uses underscores instead of spaces awesome so there's also many other third-party modules that we can use as well now one of them is called abc which is a dino framework for creating an api really easily a bit like express for node so i'm going to dive into that and start building an api in the next video