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How to Set Up SvelteKit with Tailwind CSS

swyx on September 08, 2020

Jun 2021 update: This guide has been completely updated for SvelteKit@next.113 + Tailwind JIT! You can also see this guide Aug 2021 update: try t...
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David Talbot

I followed these steps, but had major perf issues. Anyone else find the sveltePreprocess step to be very slow? Every change I made was taking around 18 seconds to reload the page. I sped it up by disabling source maps and purging, but it still took 11 seconds. I ended up rolling my own setup and now it takes 109ms. Still don't really understand what was going on, but I'm happy with my setup so I saved it here: github.com/dctalbot/svelte-typescr...
Cheers!

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vhs

While I appreciate this tutorials like they I find they go out of date in about a week. For example, using SvelteKit next.231 I found most of everything in this tutorial is no longer relevant. As such, I'd advise anyone setting up these tools to rely on offical docs and model from GitHub repos people are using to showcase their own work.

Don't forget to actually test if Autoprefixer is working when you're finished.

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Paul.42

just curious, why the purge css ignore? don't you want purge CSS to remove unused styles from the base, or is purge css too aggressive?
Thanks for the article!

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swyx

no reason - i'll be honest i blindly copied it from github.com/chrisdhanaraj/svelte-ta... but you're right, it's not needed, i took it out

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Chris Dhanaraj

For context, I pulled that one from Tailwind's docs on Controlling File Size.

tailwindcss.com/docs/controlling-f...

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swyx

dammit, lol nicely done. will add back with a note

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mgrisole

In my case I had to change the build script from:

"build": "rollup -c"
to
"build": "NODE_ENV=production rollup -c"

to actually purge unused css

Ref: tailwindcss.com/docs/optimizing-fo...

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Stanislav Khromov

Hello and thank you for writing this tutorial!

I've followed along with it but ran into an issue - the resulting bundle.css does not have prefixed classes. It seems like PostCSS does not prefix them, unlike if you use a normal <style> tag where Svelte will prefix the classes.

I've added the prefix: 'my-prefix' setting to tailwind.config.js. It does work, but you have to write out the prefixed version in your code, so flex becomes my-prefix-flex, and so on. This gets old fast. πŸ˜…

In an ideal world, I would write the normal Tailwind classes and the resulting bundle would be automatically prefixed.

PS.
I've also tried the postcss-prefixer package, but then Svelte didn't include any of my classes in the bundle.css output. Perhaps i misconfigured it...

Thank you so much again and hope that you or someone else has solved this issue or have some suggestions for how to proceed!

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swyx

no idea about that, sorry. I don't use any prefixes. perhaps check one of the alternative methods listed at the bottom to see if works

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sarioglu

Here is another similar tutorial for Svelte and Sapper that I have written a while ago: dev.to/sarioglu/using-svelte-with-...

It also includes template repositories for both.

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swyx

added, cheers. i think mine is a bit simpler tho

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Erkut TEKOĞLU

Thank you so much for this amazing guide!

I have gone with 2A option but my page not auto-reloading on tailwind css class changes.

Did I miss something?

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swyx

no you did not... i had it broken as well but @abdelwahab313 helped me fix it. what version of sveltekit are you using? make sure it is the latest

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Erkut TEKOĞLU

Everything has the latest version.
By the way, I found a quick solution for all just in 3 steps:

In the app directory,
(1) npm init svelte@next
(2) npx svelte-add@latest tailwindcss
(3) npm install

Everything is working great!
I would be very happy if you add this to the guide.

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swyx

will do

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raihan saputra

Hi Shawn, I'm trying out this config with the routify-ts template. I got the classes working, but seems like @apply directives doesn't work on my project. Did you get this working with this config?

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swyx

it worked for me but I don't use Routify so I don't know how to help you

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raihan saputra

Managed to get it working using your config. There was a duplicate preprocess key on my rollup config. Thank you for the write up!

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David Stevens

@swyx Have you seen WindiCSS? It seems to fix the overhead on the preprocess side. windicss.netlify.app/guide/svelte....

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Malik Benkirane

Thank you! I'm going to try that right away

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Malik Benkirane • Edited

Although the project is very promising...
I have discovered some issues there with an {#each...} inside of an {#if...}
I have to dig into that but I don't get compiled class for this one and styles won't get applied.

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Ilia Mikhailov

In case anyone needs to setup Sapper + Tailwind one day πŸ™‚

sapper-with-postcss-and-tailwind.v...

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swyx

added, cheers

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Kevin Bridges

Thanks for this reference @swyx . It proved to be invaluable for a new tailwind svelter!

BTW: You may want to mention that most likely you will want to remove the public/global.css reference (of the svelte template) so it does not interfere with tailwind css. This may be obvious to some, but I had several issues related to this.

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Giorgos Kontopoulos πŸ‘€

Nice one @swyx perhaps you can add some tags #svelte #tailwind ?

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swyx

oh word lol

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Blake Wight

Hmmm. Having issues with getting scss media queries working with this. Is there more I have to do to get that to work? Or should it just work?

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swyx

oh no, i dont know, i dont use scss. it should just work.. if anything is wrong its probably your setup of svelte-preprocess

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Lalit Yalamanchili • Edited

Can I suggest another method to add Tailwind to SvelteKit, I use it for all my projects.

jsco.dev/blog/how-to-set-up-tailwi...

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jesuscovam • Edited