Svelte vs Svelte Kit - What's The Difference?
Summary
TLDRIn this informative video, Scott from Level Up Tutorials clarifies the distinction between Svelte and SvelteKit. Svelte is likened to front-end frameworks such as React or Vue.js, focusing on the manipulation of the DOM through JavaScript. In contrast, SvelteKit is a comprehensive toolkit for building applications and websites with Svelte, offering features like file-based routing, server-side rendering, and API support. The video also touches on SvelteKit's unique components, such as adapters, loading functions, and layouts, emphasizing how they facilitate the development process. Scott encourages viewers interested in learning Svelte and SvelteKit to visit Level Up Tutorials for in-depth courses and resources.
Takeaways
- 📝 Svelte is a front-end framework analogous to React or Vue.js, focusing on writing code that manipulates the DOM through features like two-way binding and single-file components.
- 🛠️ SvelteKit is a toolset for building applications, static sites, and packages with Svelte, providing a structured way to develop projects using the Svelte framework.
- 🎯 The primary difference between Svelte and SvelteKit is that Svelte is the core framework for front-end development, while SvelteKit encompasses the tools and features needed to build complete applications.
- 🔄 SvelteKit includes innovative features like an adapter system for determining the output of the site, whether it's static generation like Gatsby or server-side rendering for Node.js applications.
- 🗺️ Routing in SvelteKit is based on the folder structure of the application, making it intuitive and similar to other modern web development frameworks.
- 🚀 SvelteKit's loading functions allow for server-side data fetching and preparation before the client-side render, enhancing performance and user experience.
- 🔄 Layouts in SvelteKit are special files that wrap around router files within the same folder, providing a way to create consistent structures across the application.
- 📌 Hooks in SvelteKit are not React hooks but are more akin to traditional web development hooks, allowing for interaction with the application's rendering cycle.
- 📋 SvelteKit comes with additional modules for development, such as app navigation, paths, stores, and aliasing, making it easier to build and manage applications.
- 🌐 SvelteKit supports various output modes, including Node.js apps, static generation, client-only, and server-only deployments, offering flexibility for different types of projects.
- 🎢 The SvelteKit community offers a wealth of learning resources, including Level Up Tutorials, which provide comprehensive courses on Svelte and SvelteKit for those looking to develop their skills.
Q & A
What is Svelte and how does it relate to Svelte Kit?
-Svelte is a front-end framework similar to React or Vue.js, which allows developers to write code that produces JavaScript to manipulate the DOM. Svelte Kit, on the other hand, is a set of tools for building applications, static sites, and packages with Svelte. Essentially, Svelte is the core framework, while Svelte Kit is the ecosystem for creating full-fledged web applications.
What are the key differences between Svelte and Svelte Kit?
-Svelte is focused on the front-end and is used for creating the interactive parts of web applications. It deals with features like two-way data binding, single-file components, and reactive updates. Svelte Kit, however, includes additional features like an adapter for outputting the site, a file-based routing system, server-side loading of data, and support for various deployment targets like static sites or server-side rendered applications.
What is the role of an adapter in Svelte Kit?
-An adapter in Svelte Kit determines how the application will be run or outputted. It can be used to create a statically generated site, a Node.js application, or even a Cloudflare worker. The adapter allows developers to choose the output format of the site, whether it's server-side rendered, client-side only, or a combination of both.
How does routing work in Svelte Kit?
-Svelte Kit uses a file and folder-based routing system. The structure of the application's directories dictates the routes of the site. This means that the file system layout directly corresponds to the URLs and the pages that are accessible to users.
What is the concept of 'loading' in Svelte Kit?
-In Svelte Kit, 'loading' refers to the process of fetching and preparing data on the server-side before the client-side rendering takes place. This can be used to improve performance by loading data quickly from the server. Additionally, the loading function can handle tasks like redirects, allowing for more dynamic control over navigation within the application.
Can you explain the concept of 'layouts' in Svelte Kit?
-Layouts in Svelte Kit are special files that wrap around other components, particularly the ones generated by the file-based router. They are denoted by having two underscores in their file names. A layout requires a 'slot' which is where the content from the router files is inserted. This concept is similar to how slots work in Svelte components and allows for a consistent structure across different pages of the application.
What additional modules does Svelte Kit provide for development?
-Svelte Kit comes with several additional modules to aid in development. These include 'app/env' for accessing environment information, 'app/navigation' for programmatic interaction with the router, 'app/paths' for base path information, and 'app/stores' for default reactive stores. These modules help developers manage various aspects of the application's behavior and interaction with the user.
How does Svelte Kit handle prefetching of routes?
-Svelte Kit offers a feature called 'svelteKit prefetch' that allows for prefetching of routes. This means that the application can load parts of the site in the background, improving the overall user experience by having content ready to display as soon as the user navigates to it.
What is the command-line interface provided by Svelte Kit?
-Svelte Kit includes a command-line interface that allows developers to easily run various modes and tasks. Commands like 'dev' for development mode, 'build' for creating a production build, and 'preview' for previewing the production build are available. This simplifies the development and deployment process for Svelte Kit applications.
How does Svelte Kit handle different deployment targets?
-Svelte Kit is flexible when it comes to deployment. It supports various deployment targets such as static sites, Node.js applications, client-only applications, and even server-only applications. This is achieved through the use of different adapters, which dictate the output and behavior of the application depending on the chosen deployment method.
What is the relationship between Svelte Kit and other Svelte-based platforms like Elder.js or Astro.build?
-Svelte Kit is a specific ecosystem for building applications with Svelte, while other platforms like Elder.js or Astro.build are alternative ways to consume and build with Svelte. While Svelte can be used across these different platforms, Svelte Kit is specifically designed to provide a comprehensive set of tools for application development, including features like routing, data loading, and deployment options that may not be present in other Svelte-based platforms.
Outlines
🚀 Introduction to Svelte and SvelteKit
This paragraph introduces the speaker, Scott from LevelUp Tutorials, and sets the stage for a discussion on Svelte and SvelteKit. Scott addresses the common confusion between the two, noting that while Svelte is frequently mentioned online, SvelteKit is less well understood by newcomers. He promises a brief explanation rather than an in-depth tutorial, aiming to clarify when and how to use Svelte and SvelteKit together in web development.
📚 Understanding the Differences: Svelte vs SvelteKit
Scott explains the fundamental difference between Svelte and SvelteKit using analogies to other popular frameworks. Svelte is likened to React or Vue.js, serving as a front-end framework for writing code that manipulates the DOM. SvelteKit, on the other hand, is a toolset for building applications, static sites, and packages with Svelte. It includes features like adapters for outputting the site, a file-based routing system, and a unique loading function for server-side data fetching and redirects. The explanation positions SvelteKit as the go-to for building apps with Svelte, while emphasizing that Svelte itself is the front-end framework utilized within SvelteKit.
🛠️ Additional Features and Capabilities of SvelteKit
This paragraph delves into the additional features that make SvelteKit stand out for building web applications. It covers the concept of layouts, which are special files that wrap around the router files, and hooks, which are reminiscent of web development hooks rather than React hooks. Scott also mentions various modules included with SvelteKit, such as app navigation, paths, stores, and aliasing. He touches on SvelteKit's flexibility in outputting code for different types of applications and its command-line interface. Furthermore, he highlights SvelteKit's compatibility with Svelte's configuration options and Rollup plugins, wrapping up with a note on the potential for future exploration of SvelteKit's features.
🎓 Learning Resources and Course Promotion
In the final paragraph, Scott promotes LevelUp Tutorials as a resource for learning Svelte, SvelteKit, and other related technologies. He mentions the regular release of new tutorial courses and the variety of content creators contributing to the platform. Scott specifically points out the current month's focus on Astro.build and Svelte's role in it. He encourages viewers to visit LevelUp Tutorials for a comprehensive learning experience and mentions a discount for annual subscriptions, emphasizing the value of the content provided.
Mindmap
Keywords
💡Svelte
💡SvelteKit
💡Adapter
💡Routing
💡Loading
💡Layouts
💡Hooks
💡Additional Modules
💡Prefetching
💡Configuration Options
💡Command Line Interface (CLI)
Highlights
Svelte and SvelteKit are often confused but they serve different purposes in web development.
Svelte is a front-end framework similar to React or Vue.js, focusing on the manipulation of the DOM through JavaScript.
SvelteKit is a toolset for building applications, static sites, and packages with Svelte, offering a more comprehensive development experience.
SvelteKit includes features like an adapter for outputting the site, routing, loading, and layouts, which are not present in Svelte alone.
The adapter in SvelteKit allows developers to choose the output method of their site, such as static generation or server-side rendering.
SvelteKit uses a file and folder-based routing system, simplifying the process of defining site routes based on the application's structure.
Loading in SvelteKit is a concept for server-side data fetching and preparation before the client-side rendering takes place.
Layouts in SvelteKit are special files that wrap around router files, providing a way to create consistent structures across the site.
SvelteKit includes additional modules like app navigation, paths, stores, and aliasing to enhance the development process.
SvelteKit supports various output methods, including Node apps, static generation, client-only, and server-only deployments.
SvelteKit has a command-line interface for easy management of development modes, building, and previewing.
SvelteKit is built on top of Vite, offering all the Vite configuration options and the ability to use Rollup plugins.
Svelte can be used with other platforms like Elder.js or Astro.build, but SvelteKit is the recommended toolset for building applications with Svelte.
Level Up Tutorials offers courses on Svelte and SvelteKit, including animation and component development.
The upcoming course on Astro.build will feature the use of Svelte within the Astro framework.
By understanding the differences between Svelte and SvelteKit, developers can make informed decisions on the right tools for their web development projects.
Transcripts
hey what's up this is scott with level
up tutorials and in this weekly's felt
we're going to be talking about svelt
and svelt kit now this is a question i
see pop up on reddit twitter everywhere
all the time what's the difference
between svelt and svelt kit uh whether
or not there's confusion there or people
just are new to the platform and see
people building things with self kit and
or don't know what the difference is
this will be a quick explainer it's not
going to be anything crazy in depth it's
by all means not going to be like a
full-on tutorial on using either of
these projects but it will hopefully
give you an idea of when to use what and
where and how to talk about these things
as if they're these separate things but
uh used together and how they are so
okay let's talk about the difference
between svelt and sveltkit
svelt is more analogous if we're looking
at front-end frameworks it's more
analogous to something like react or
even vue.js right it's the framework
it's the front-end framework it's the
thing that allows you to write the code
and it spits out
the
javascript that manipulates the dom okay
that's felt when you use the the two-way
binding when you use what other kind of
features the um the single file
components the svelt files those are all
svelte things what about sveltkit
well sveltkit is how you build apps
sites static apps static sites packages
that's how you build things with svelt
and in the past
you've built
uh things with svelten in many other
ways whether you're using svelt's own
thing that used to be called it was
sapper was the the precursor just felt
kit or maybe use something like elder js
there's a number of these different
svelte projects but sveltkit is
essentially the way to build apps or
websites with svelt okay so svelte is
the front-end framework and svelte kit
is essentially the kit to build
applications with now sveltkit has a lot
of really neat features that make it
stand out and be different from some of
these other platforms so if we're going
to try to keep up with this analogous
thing if you're coming up from the react
world svelt is to react as spelt kit is
to next js or perhaps even gatsby and if
you're coming from the view land of
things uh svelte is to view as felt kit
is to nuxt js and if you're not coming
from either of these think about it like
this svelte is the front-end framework
sveltekit is what you use to build apps
with svelte okay that is at the very
most plain english the best way to
possibly describe it so if you were
saying i want to i want to build an
application from scratch and this thing
needs to be server side rendered and
needs to have an api you'd pick up svelt
kit you wouldn't even you wouldn't pick
up svelte itself you'd pick up sveltekit
to build that application now spelled
kid uses svelt so you are writing the
app in spelt
but sveltkit again is the tools in the
kit for you to build these applications
now what does it include that makes it
do these things well it includes things
like an adapter now an adapter is how
you output the site
so let's say you wanted to have a
statically generated site like a gatsby
site it's a site that takes your
javascript and outputs it in just
straight up html that is going to be
using an adapter in swelt kit or if you
want to say i want this actually be a
node app where everything is generated
on the server that's also an adapter or
maybe you want this to run in a
cloudflare worker that's an adapter okay
so an adapter is something that chooses
the output of the site and it's really
neat that you get to pick that so you
don't have to have your different
project built on something else just to
have a static output right now what else
is included in spell kit also in spell
kit is the routing system now just like
next js or some of these other ones it
uses a file
uh folder based routing system as in uh
based on the folder structure of your
application it determines the routes of
your site now routers uh as a concept is
basically when you hit a url when you go
to a url in your browser where does the
app go like what files does this thing
load what components does this render
so
spell kit includes routing
okay it includes adapters how the
application will eventually be run
but it also includes something called
loading now loading is an interesting
concept and loading is basically where
you define the data can be loaded uh in
the server side before the client side
render takes place
again this can also be run just straight
up client side if you want it to be that
way or it can be run both so a loading
function is basically this is where you
fetch all your data before the component
gets to be run okay
so this loading function is something
that is only in spell kit is not in
svelt and this thing runs essentially
before the component even starts to
mount so unmount none of that stuff will
be called until long after the well
maybe not long after but after the load
function has been run and load functions
can do a number of things it can like i
said fetch your data prepare that data
for server-side rendering but it also
can handle redirects let's say you want
to uh look at something on the server
you know based on that maybe perhaps do
a redirect so okay we have page routing
we have the output we have
um the loading
we also have layouts now layouts is a
concept that kind of exists in felt as
in we have this this concept is felt
called slots which is how you insert
something into another component in
react it's children but in svelte you
have the idea of a slot now a layout in
sveltkit is a special file that has two
underscores in front of it and it
requires a slot and it will essentially
wrap around the file based router files
within that same folder okay it's just
what you would expect when you hear the
word layout if you've worked in any of
these platforms now in addition to that
there's some other little things like
hooks which aren't necessarily anything
you need to think about too much if
we're giving a 101 here these aren't
like essential it's not analogous to
react hooks no relation there whatsoever
this is more like what you're used to
with any sort of web development hook
you know when react started calling them
hooks it was kind of weird that they did
because hooks has this other connotation
where it's like you can hook into parts
of the application uh the rendering
cycle right and that that's kind of what
hooks are and react in a way but it's
confusing right so also svelka has a
number of additional modules which are
basically packages that come with felt
kit to help you in your development flow
things like app env which gives you
environment information whether or not
your application's running in
development mode those types of things
we also have things like app navigation
which allows you to interact with the
router there's a go to function to go to
a url invalidate
prefetch prefetch routes a lot of cool
stuff in here
but just basically you could think of
this as the router right if you want to
have access to the router programically
that's how you do it um there's app
paths which are some base path
information app stores which are some
default stores um some reactive stores
that come baked into sphelp kit such as
whether or not the page is currently
navigating we use this on level up
tutorials that if the page is currently
navigating show a loading spinner some
people use this for some different
things but that's what exists
we have things like the page again i'm
not going to do a total in depth about
everything here
there's also some aliasing going on here
there's some neat stuff but basically at
the end of the day this is the stuff
that allows you to again uh this is the
stuff that allows you to build websites
and applications um with svelte
now some neat stuff okay uh svelkit has
some really neat stuff that i would love
to dive more into in this video but like
stuff like uh svelkit prefetch to
prefetch routes again this is all
routing related spell kit no scroll
what else do we have here some amp mode
i don't use amp myself so um i don't as
i honestly don't know too much about amp
as it exists in spell kit because i just
don't straight up use it it allows you
again to choose how you're outputting
your code whether it is as a node app
and ssr whether it's statically
generated whether it's client only or
even just server only right you can do
all of that now there's also a command
line interface that allows you to just
basically run dev mode build preview
package and sveltkit is built on top of
veet so uh you you end up having all the
veeat configuration options as well
which
is awesome and again v uses rollup
plugins so you can use rollup plugins in
spell kit it all works very very well
very super good um and and that's it i
mean there's some configuration options
but if we're doing like what's the
difference here i think i've made it
pretty clear what the difference is um
there's some neat stuff about um
just in general what's going on here but
again at the end of the day you're
building applications with spell kit and
you're most likely not building
applications with svelt but you're using
svelte in sveltkit to build applications
okay
so like think about it this way there's
other platforms that can consume svelte
uh whether that is elder js or astro dot
build right astro build you can use felt
and astronaut dot built but you're not
using spelled kit in astro build if that
makes sense right so i hope this is a
quick explainer again i'm hoping not to
go too too in-depth here i don't want to
um you know turn this into a full-on
every every little thing that is about
here but what i do want to do is make it
very clear in plain english what the
difference is here because i do hear
this question come up all the time i'm
hearing the words felt i'm hearing the
words spell kit i don't know the
difference
that's the difference thank you so much
for watching and if you'd like to learn
svelte and spelt kit or svelte in spell
kit or
s felt with sappers still leaving for
some reason but i would recommend going
to spell kit um if you want to learn
spelt spell kit animating spelled
buildings fall components any of that
head on over to level up tutorials dot
com uh if you sign up for the year you
can save 25
um and that's a really good deal because
we come out with a new tutorial course
every single month and we have some
brand new courses coming from some
extremely talented content creators as
well as a ton of new courses from yours
truly doing all sorts of really cool
stuff in fact this month's course is on
astro astro.build and we're going to be
using some svelt in astro you better
believe so thanks so much for watching
and i will see you in the next one
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