Emil Kowalski's banner
Emil Kowalski's profile picture

Emil Kowalski

@emilkowalski • 90,677 subscribers

Currently @linear, https://t.co/uxXxCQx3aK

Shorts

One of my favorite details of Sonner: By default the toast disappears after 4 seconds unless you hover over it. But what if a toast is triggered and the user switches to a different tab? 4 seconds would pass and the toast would never be seen. That’s why there’s a `useIsDocumentHidden` hook that checks if the document (tab) is hidden, and if so, it will pause the timer. This can be done with the "visibilitychange" event listener on the document. A small detail that improves the experience.

One of my favorite details of Sonner: By default the toast disappears after 4 seconds unless you hover over it. But what if a toast is triggered and the user switches to a different tab? 4 seconds would pass and the toast would never be seen. That’s why there’s a `useIsDocumentHidden` hook that checks if the document (tab) is hidden, and if so, it will pause the timer. This can be done with the "visibilitychange" event listener on the document. A small detail that improves the experience.

52,215 views

After more than 4 months, is opening in exactly 7 days. Some cool new things will be waiting :)

After more than 4 months, is opening in exactly 7 days. Some cool new things will be waiting :)

64,029 views

We had this long-standing papercut at Linear where the menu items overflow their outer container. It was hard to fix, or so I thought, because the structure is pretty complicated given all the design details, so a simple overflow: hidden wouldn’t work as it would break the animation. But today I had an epiphany that we could just use a simple CSS mask and fade the items out. Here’s a before & after with a zoom on the problem, look at the left edge:

We had this long-standing papercut at Linear where the menu items overflow their outer container. It was hard to fix, or so I thought, because the structure is pretty complicated given all the design details, so a simple overflow: hidden wouldn’t work as it would break the animation. But today I had an epiphany that we could just use a simple CSS mask and fade the items out. Here’s a before & after with a zoom on the problem, look at the left edge:

119,390 views

You might’ve seen this bug before where the hover state keeps flickering. The fix is to separate the trigger from the effect. Listen for hovers on the parent, but animate a child element instead. This ensures that the hover area stays consistent.

You might’ve seen this bug before where the hover state keeps flickering. The fix is to separate the trigger from the effect. Listen for hovers on the parent, but animate a child element instead. This ensures that the hover area stays consistent.

667,021 views

Made this interaction of Linear’s dithered logo for our latest release. It’s using canvas with a lot of tiny dots. There’s an invisible circle around the cursor. Any dot inside it gets pushed outward with a cubic falloff so it’s gentle on the edges, and strong at the center.

Made this interaction of Linear’s dithered logo for our latest release. It’s using canvas with a lot of tiny dots. There’s an invisible circle around the cursor. Any dot inside it gets pushed outward with a cubic falloff so it’s gentle on the edges, and strong at the center.

469,962 views

Don’t animate keyboard-initiated actions. As an example, I use Raycast hundreds of times a day. If it animated every time I opened it, it would make it feel slow, delayed, and disconnected from my actions. But there’s no animation at all. That’s the optimal experience.

Don’t animate keyboard-initiated actions. As an example, I use Raycast hundreds of times a day. If it animated every time I opened it, it would make it feel slow, delayed, and disconnected from my actions. But there’s no animation at all. That’s the optimal experience.

321,515 views

A recent addition to our /now page at Linear: Hovering over a video card will play the video starting from the frame visible on the thumbnail so it matches nicely. The Coinbase one is especially satisfying (a very nice video too!).

A recent addition to our /now page at Linear: Hovering over a video card will play the video starting from the frame visible on the thumbnail so it matches nicely. The Coinbase one is especially satisfying (a very nice video too!).

38,003 views

Something that AI unlocks is being able to try a few different variations of a feature quickly. I often ask my coding agent to come up with a few different variants and add a switcher so I can easily swap between them. It also saves your selection as a query param so I can show a specific variation to a colleague. This + a library like Leva for controls that directly influence an interaction makes prototyping and coming up with different ideas extremely easy.

Something that AI unlocks is being able to try a few different variations of a feature quickly. I often ask my coding agent to come up with a few different variants and add a switcher so I can easily swap between them. It also saves your selection as a query param so I can show a specific variation to a colleague. This + a library like Leva for controls that directly influence an interaction makes prototyping and coming up with different ideas extremely easy.

70,532 views

Fixed this small bug in Linear’s app today which I often see in other apps as well. Here’s a small before/after. The issue: When you open a popover inside a modal (think a custom select), clicking outside the popover to close it also closes the modal. The desired behavior is to close the select on click outside while keeping the modal open. This often happens because custom dropdowns or select components are rendered in a portal. The modal then treats the interaction as an outside click because, technically, the dropdown isn’t inside the modal in the DOM, it’s rendered elsewhere via a portal. The fix depends on your setup, whether it’s Radix/Base UI, fully custom etc. But since you now know the cause of it, you can ask your agent to fix it for you!

Fixed this small bug in Linear’s app today which I often see in other apps as well. Here’s a small before/after. The issue: When you open a popover inside a modal (think a custom select), clicking outside the popover to close it also closes the modal. The desired behavior is to close the select on click outside while keeping the modal open. This often happens because custom dropdowns or select components are rendered in a portal. The modal then treats the interaction as an outside click because, technically, the dropdown isn’t inside the modal in the DOM, it’s rendered elsewhere via a portal. The fix depends on your setup, whether it’s Radix/Base UI, fully custom etc. But since you now know the cause of it, you can ask your agent to fix it for you!

88,922 views

Introducing Animations on the web A course about how to craft animations that make people feel something. It contains everything I know about motion on the web.

Introducing Animations on the web A course about how to craft animations that make people feel something. It contains everything I know about motion on the web.

741,422 views

There’s a fun little easter egg in my animation course: As enrollment gets closer to closing, the butter cube melts more with each hour by animating the svg paths.

There’s a fun little easter egg in my animation course: As enrollment gets closer to closing, the butter cube melts more with each hour by animating the svg paths.

141,618 views

One of my favorite things from the new Linear homepage are these side drawers which you can open to get some info about a specific feature. Made with Base UI’s dialog component and some ease-out.

One of my favorite things from the new Linear homepage are these side drawers which you can open to get some info about a specific feature. Made with Base UI’s dialog component and some ease-out.

51,610 views

Hover transitions seen tens, maybe even hundreds of times a day can make your interface feel slower. Make them snappy by removing the transition altogether.

Hover transitions seen tens, maybe even hundreds of times a day can make your interface feel slower. Make them snappy by removing the transition altogether.

115,307 views

Keep your animations fast. A faster-spinning spinner makes you think the app loads faster. It improves perceived performance. The same applies to user-initiated actions. Use `ease-out` to make them feel snappy and responsive.

Keep your animations fast. A faster-spinning spinner makes you think the app loads faster. It improves perceived performance. The same applies to user-initiated actions. Use `ease-out` to make them feel snappy and responsive.

102,168 views

A high-ROI tip from is to record your animations and play them frame by frame to spot imperfections you wouldn’t otherwise notice. These hidden imperfections are what makes an animation feel off, even though it looks alright at first glance.

A high-ROI tip from is to record your animations and play them frame by frame to spot imperfections you wouldn’t otherwise notice. These hidden imperfections are what makes an animation feel off, even though it looks alright at first glance.

31,113 views

Some animations for the hero section of animations[.]dev. Made by a course student (dimi). Coming soon.

Some animations for the hero section of animations[.]dev. Made by a course student (dimi). Coming soon.

47,559 views

Some exciting updates coming to my animation course soon. Here’s a sneak peek (this won’t be a lesson on 3D):

Some exciting updates coming to my animation course soon. Here’s a sneak peek (this won’t be a lesson on 3D):

25,634 views

Trying some stuff out and I kinda like that the button changes color depending on the state that it's in?

Trying some stuff out and I kinda like that the button changes color depending on the state that it's in?

48,051 views

Videos

LIVE
1.2k

Anya Rossi

sweetdream.ai

SweetDream.aiSponsored•Livecam
Streaming Now

Watch Anya Live

Anya is streaming live right now! Join her private show and enjoy exclusive content.

HD live stream
Exclusive private shows
1.2k viewers online

Free preview available • Premium content

New skill: /improve-animations Inspired by shadcn’s improve skill I made one specifically for animations. Use your most capable model to audit animations in your project and hand the execution to cheaper models. Fable is available through July 12, so make good use out of it!
0:35
emilkowalski's profile picture

New skill: /improve-animations Inspired by shadcn’s improve skill I made one specifically for animations. Use your most capable model to audit animations in your project and hand the execution to cheaper models. Fable is available through July 12, so make good use out of it!

Emil Kowalski

503,600 views • 1 month ago

Thanks to AI we can now move way faster to actually trying things in code, and it’s great. Exploration in design tools is obviously needed too, but by being able to touch the UI you can experience it instead of just imagining how it would actually feel.
0:27
emilkowalski's profile picture

Thanks to AI we can now move way faster to actually trying things in code, and it’s great. Exploration in design tools is obviously needed too, but by being able to touch the UI you can experience it instead of just imagining how it would actually feel.

Emil Kowalski

95,576 views • 1 month ago

Given how impressed I was with Cursor’s Thermo-Nuclear Code Quality Review skill, I decided to create a similar one, but specifically for animations. /review-animations to review, and /emil-design-eng to build animations. They complement each other well
0:31
emilkowalski's profile picture

Given how impressed I was with Cursor’s Thermo-Nuclear Code Quality Review skill, I decided to create a similar one, but specifically for animations. /review-animations to review, and /emil-design-eng to build animations. They complement each other well

Emil Kowalski

213,172 views • 2 months ago

You can enroll in my animation course for the next 10 days! It's the perfect way to learn the theory behind great animations, but also how to build them in code. Now with a skill file for agents. We'll cover all of these components and more, source code included.
1:05
emilkowalski's profile picture

You can enroll in my animation course for the next 10 days! It's the perfect way to learn the theory behind great animations, but also how to build them in code. Now with a skill file for agents. We'll cover all of these components and more, source code included.

Emil Kowalski

559,999 views • 7 months ago

Lately, before going to sleep, I’ve been tasking Fable with creating interactive visuals. Clicking on the image generates a new variation. Definitely not a masterpiece, but it’s interesting to see what it comes up with. And who knows maybe I’ll use some of them as inspo one day.
0:28
emilkowalski's profile picture

Lately, before going to sleep, I’ve been tasking Fable with creating interactive visuals. Clicking on the image generates a new variation. Definitely not a masterpiece, but it’s interesting to see what it comes up with. And who knows maybe I’ll use some of them as inspo one day.

Emil Kowalski

40,777 views • 21 days ago

Built some graphs and punched cards for a recent Linear Data Report.
0:24
emilkowalski's profile picture

Built some graphs and punched cards for a recent Linear Data Report.

Emil Kowalski

24,997 views • 13 days ago

A year at Linear
0:49
emilkowalski's profile picture

A year at Linear

Emil Kowalski

402,736 views • 10 months ago

You can enroll in my animation course for the next 10 days! It's the perfect way to learn the theory behind great animations, but also how to build them in code. We'll cover all of these components and more, source code included.
0:37
emilkowalski's profile picture

You can enroll in my animation course for the next 10 days! It's the perfect way to learn the theory behind great animations, but also how to build them in code. We'll cover all of these components and more, source code included.

Emil Kowalski

334,807 views • 11 months ago

Each enrollment of comes with free updates for existing students. This time it’s a new lesson on training your judgement with more than 20 exercises, and a guest lesson by joshpuckett called “Animations as Proof of Care”. You still have 2 days to join!
0:44
emilkowalski's profile picture

Each enrollment of comes with free updates for existing students. This time it’s a new lesson on training your judgement with more than 20 exercises, and a guest lesson by joshpuckett called “Animations as Proof of Care”. You still have 2 days to join!

Emil Kowalski

81,845 views • 4 months ago

A demo of the animations[.]dev skill file using Claude Code. It can review your animations, suggest improvements, and basically answer all your motion-related questions based on my experience gathered over the years.
0:36
emilkowalski's profile picture

A demo of the animations[.]dev skill file using Claude Code. It can review your animations, suggest improvements, and basically answer all your motion-related questions based on my experience gathered over the years.

Emil Kowalski

124,681 views • 7 months ago

Quick demo of the skill file. Improve any animation based on my knowledge and experience gathered over the years:
0:31
emilkowalski's profile picture

Quick demo of the skill file. Improve any animation based on my knowledge and experience gathered over the years:

Emil Kowalski

66,571 views • 4 months ago

My animation course is live! It contains everything I know about animations on the web. We'll build all of these and more.
0:20
emilkowalski's profile picture

My animation course is live! It contains everything I know about animations on the web. We'll build all of these and more.

Emil Kowalski

249,862 views • 2 years ago

New lesson for upcoming enrollment. It’s about training your judgement. You’ll see two versions of the same animation, your job is to choose one and explain why it’s better. A great skill to have when working with coding agents like Claude Code and Codex
0:34
emilkowalski's profile picture

New lesson for upcoming enrollment. It’s about training your judgement. You’ll see two versions of the same animation, your job is to choose one and explain why it’s better. A great skill to have when working with coding agents like Claude Code and Codex

Emil Kowalski

55,258 views • 4 months ago

Introducing Vaul 1.0. A drawer component for React. Rewritten, improved, with new docs.
0:20
emilkowalski's profile picture

Introducing Vaul 1.0. A drawer component for React. Rewritten, improved, with new docs.

Emil Kowalski

119,551 views • 1 year ago

Few interactions and animations from the new Linear homepage
0:26
emilkowalski's profile picture

Few interactions and animations from the new Linear homepage

Emil Kowalski

42,767 views • 6 months ago

A few interactive demos from a recent addition to my animation course: A six-part module on SVG animations where you’ll learn about the coordinate system, path syntax, stroke properties, and more. We’ll end up building some of the illustrations from the course’s homepage.
0:56
emilkowalski's profile picture

A few interactive demos from a recent addition to my animation course: A six-part module on SVG animations where you’ll learn about the coordinate system, path syntax, stroke properties, and more. We’ll end up building some of the illustrations from the course’s homepage.

Emil Kowalski

38,732 views • 6 months ago

More than 900 designers and engineers have joined my animations course in the last 10 days. That's more than 6,600 students in total since January 2024. Extremely grateful. You still have ~2 hours to join!
0:27
emilkowalski's profile picture

More than 900 designers and engineers have joined my animations course in the last 10 days. That's more than 6,600 students in total since January 2024. Extremely grateful. You still have ~2 hours to join!

Emil Kowalski

67,067 views • 1 year ago

Some Linear Method interactions
0:38
emilkowalski's profile picture

Some Linear Method interactions

Emil Kowalski

38,333 views • 7 months ago

No more content to load