Darius Cosden 🧑🏻💻
@cosden.dev
Teaching React at @cosdensolutions · 170k subs · Building an AI learning platform
My most viewed YT short (1.2m views) is me roasting my own code
Every day there are devs out there who see the horrendous code I wrote 8+ years ago
Every day there are devs out there who see the horrendous code I wrote 8+ years ago
December 9, 2025 at 11:04 AM
My most viewed YT short (1.2m views) is me roasting my own code
Every day there are devs out there who see the horrendous code I wrote 8+ years ago
Every day there are devs out there who see the horrendous code I wrote 8+ years ago
Something I want to do more of on my YT channel is to provide value
I learnt this many years ago but didn't keep it top of mind lately
Always start a video with "what value am I giving to the viewer?"
You'll find that will make them watch and come back for more
I learnt this many years ago but didn't keep it top of mind lately
Always start a video with "what value am I giving to the viewer?"
You'll find that will make them watch and come back for more
December 8, 2025 at 10:58 AM
Something I want to do more of on my YT channel is to provide value
I learnt this many years ago but didn't keep it top of mind lately
Always start a video with "what value am I giving to the viewer?"
You'll find that will make them watch and come back for more
I learnt this many years ago but didn't keep it top of mind lately
Always start a video with "what value am I giving to the viewer?"
You'll find that will make them watch and come back for more
Currently not vibe coding in the north of Sweden 🧖🏻♂️
December 6, 2025 at 6:46 PM
Currently not vibe coding in the north of Sweden 🧖🏻♂️
I believe I may have had my first word of mouth sale
Someone purchased using a discount code only sent to a few users and their email is not on that list
So someone must've given it to them
Really cool if true
Someone purchased using a discount code only sent to a few users and their email is not on that list
So someone must've given it to them
Really cool if true
December 5, 2025 at 4:00 PM
I believe I may have had my first word of mouth sale
Someone purchased using a discount code only sent to a few users and their email is not on that list
So someone must've given it to them
Really cool if true
Someone purchased using a discount code only sent to a few users and their email is not on that list
So someone must've given it to them
Really cool if true
Latest YT video did alright
Most views are existing subscribers
Which is great, but I want to reach more new viewers too
Most views are existing subscribers
Which is great, but I want to reach more new viewers too
December 5, 2025 at 11:02 AM
Latest YT video did alright
Most views are existing subscribers
Which is great, but I want to reach more new viewers too
Most views are existing subscribers
Which is great, but I want to reach more new viewers too
YT channel views are also down in the last 90 days
This is mostly due to not uploading videos
I was too busy filming 129 videos for Cosden Code
Time to give YT some more attention
This is mostly due to not uploading videos
I was too busy filming 129 videos for Cosden Code
Time to give YT some more attention
December 4, 2025 at 4:04 PM
YT channel views are also down in the last 90 days
This is mostly due to not uploading videos
I was too busy filming 129 videos for Cosden Code
Time to give YT some more attention
This is mostly due to not uploading videos
I was too busy filming 129 videos for Cosden Code
Time to give YT some more attention
Ok so sales have definitely slowed down after Black Friday launch
That's expected and I'm not mad about it
I'm playing the long game
Time to make great YT videos again
That's expected and I'm not mad about it
I'm playing the long game
Time to make great YT videos again
December 4, 2025 at 11:04 AM
Ok so sales have definitely slowed down after Black Friday launch
That's expected and I'm not mad about it
I'm playing the long game
Time to make great YT videos again
That's expected and I'm not mad about it
I'm playing the long game
Time to make great YT videos again
MRR is slowly growing
I'm not looking for a fast spike. I'm playing the long game
I want Cosden code to still be relevant and successful in 5 years
I'm not looking for a fast spike. I'm playing the long game
I want Cosden code to still be relevant and successful in 5 years
December 3, 2025 at 11:00 AM
MRR is slowly growing
I'm not looking for a fast spike. I'm playing the long game
I want Cosden code to still be relevant and successful in 5 years
I'm not looking for a fast spike. I'm playing the long game
I want Cosden code to still be relevant and successful in 5 years
I've been really happy with @polar_sh as my MoR for Cosden Code
The Black Friday launch was super successful and there have been no issues
Customer support is great too
I highly recommend them if you're launching a SaaS
The Black Friday launch was super successful and there have been no issues
Customer support is great too
I highly recommend them if you're launching a SaaS
December 2, 2025 at 3:58 PM
I've been really happy with @polar_sh as my MoR for Cosden Code
The Black Friday launch was super successful and there have been no issues
Customer support is great too
I highly recommend them if you're launching a SaaS
The Black Friday launch was super successful and there have been no issues
Customer support is great too
I highly recommend them if you're launching a SaaS
Recently crossed 100 users and 5k XP on Cosden Code!
That's 100+ devs taking their React success in their own hands
That's 100+ devs taking their React success in their own hands
December 2, 2025 at 2:12 PM
Recently crossed 100 users and 5k XP on Cosden Code!
That's 100+ devs taking their React success in their own hands
That's 100+ devs taking their React success in their own hands
Introducing Cosden Code!
This is the ultimate learning platform for full-stack React
Interactive courses and guided projects on JS/TS, React, Redux, Zustand, React Router, Tanstack Router, Next.js, and more!
In-depth video lessons, integrated IDE, and an AI mentor
Details 👇
This is the ultimate learning platform for full-stack React
Interactive courses and guided projects on JS/TS, React, Redux, Zustand, React Router, Tanstack Router, Next.js, and more!
In-depth video lessons, integrated IDE, and an AI mentor
Details 👇
December 1, 2025 at 4:15 PM
Introducing Cosden Code!
This is the ultimate learning platform for full-stack React
Interactive courses and guided projects on JS/TS, React, Redux, Zustand, React Router, Tanstack Router, Next.js, and more!
In-depth video lessons, integrated IDE, and an AI mentor
Details 👇
This is the ultimate learning platform for full-stack React
Interactive courses and guided projects on JS/TS, React, Redux, Zustand, React Router, Tanstack Router, Next.js, and more!
In-depth video lessons, integrated IDE, and an AI mentor
Details 👇
I'm realizing a lot of developers don't fully understand how React works
Even when I make videos showing how it is, and using the official docs as support, they still don't get it
So here's a couple of the most important things you need to know about how React works
Even when I make videos showing how it is, and using the official docs as support, they still don't get it
So here's a couple of the most important things you need to know about how React works
October 28, 2025 at 11:00 AM
I'm realizing a lot of developers don't fully understand how React works
Even when I make videos showing how it is, and using the official docs as support, they still don't get it
So here's a couple of the most important things you need to know about how React works
Even when I make videos showing how it is, and using the official docs as support, they still don't get it
So here's a couple of the most important things you need to know about how React works
Today I start filming the "React Fundamentals" course on Cosden Code
This will cover all the essentials like JSX, components, state, hooks, etc
It won't cover 3rd party libraries (RQ, forms, state management) since those will be in other courses
What topics do you want to see?
This will cover all the essentials like JSX, components, state, hooks, etc
It won't cover 3rd party libraries (RQ, forms, state management) since those will be in other courses
What topics do you want to see?
October 27, 2025 at 11:01 AM
Today I start filming the "React Fundamentals" course on Cosden Code
This will cover all the essentials like JSX, components, state, hooks, etc
It won't cover 3rd party libraries (RQ, forms, state management) since those will be in other courses
What topics do you want to see?
This will cover all the essentials like JSX, components, state, hooks, etc
It won't cover 3rd party libraries (RQ, forms, state management) since those will be in other courses
What topics do you want to see?
Just added the first video lessons to my new platform Cosden Code (coming soon)
The videos are SO GOOD. Literally my best work
First course is on design patterns in React, and I promise you, you haven't seen most of these patterns
I'm beyond excited to launch this
The videos are SO GOOD. Literally my best work
First course is on design patterns in React, and I promise you, you haven't seen most of these patterns
I'm beyond excited to launch this
October 24, 2025 at 9:56 AM
Just added the first video lessons to my new platform Cosden Code (coming soon)
The videos are SO GOOD. Literally my best work
First course is on design patterns in React, and I promise you, you haven't seen most of these patterns
I'm beyond excited to launch this
The videos are SO GOOD. Literally my best work
First course is on design patterns in React, and I promise you, you haven't seen most of these patterns
I'm beyond excited to launch this
In React, the smaller your components are, the better
Building small components makes your apps simple, maintainable, and scalable
You can still have complexity, but it will be much easier to manage with small pieces
The best code is simple code
Building small components makes your apps simple, maintainable, and scalable
You can still have complexity, but it will be much easier to manage with small pieces
The best code is simple code
October 23, 2025 at 9:57 AM
In React, the smaller your components are, the better
Building small components makes your apps simple, maintainable, and scalable
You can still have complexity, but it will be much easier to manage with small pieces
The best code is simple code
Building small components makes your apps simple, maintainable, and scalable
You can still have complexity, but it will be much easier to manage with small pieces
The best code is simple code
I'm currently trying out Windsurf coming from Cursor
First impressions, it's mostly the same, but the tab complete is inferior
You really feel it when trying to tab complete a lot of files
Pricing is better though so idk
First impressions, it's mostly the same, but the tab complete is inferior
You really feel it when trying to tab complete a lot of files
Pricing is better though so idk
October 22, 2025 at 3:02 PM
I'm currently trying out Windsurf coming from Cursor
First impressions, it's mostly the same, but the tab complete is inferior
You really feel it when trying to tab complete a lot of files
Pricing is better though so idk
First impressions, it's mostly the same, but the tab complete is inferior
You really feel it when trying to tab complete a lot of files
Pricing is better though so idk
React tip for state updates
Instead of:
setCount(count + 1)
Do:
setCount(prev => prev + 1)
The function version always gets the current state. Helps avoid bugs with stale values
Instead of:
setCount(count + 1)
Do:
setCount(prev => prev + 1)
The function version always gets the current state. Helps avoid bugs with stale values
October 20, 2025 at 10:04 AM
React tip for state updates
Instead of:
setCount(count + 1)
Do:
setCount(prev => prev + 1)
The function version always gets the current state. Helps avoid bugs with stale values
Instead of:
setCount(count + 1)
Do:
setCount(prev => prev + 1)
The function version always gets the current state. Helps avoid bugs with stale values
Quick debugging tip for React devs
Instead of:
console.log(user)
console.log(posts)
Do this:
console.log({ user, posts })
You get labeled output in the console. Makes it way easier to track what's what when you have multiple logs
Instead of:
console.log(user)
console.log(posts)
Do this:
console.log({ user, posts })
You get labeled output in the console. Makes it way easier to track what's what when you have multiple logs
October 17, 2025 at 10:04 AM
Quick debugging tip for React devs
Instead of:
console.log(user)
console.log(posts)
Do this:
console.log({ user, posts })
You get labeled output in the console. Makes it way easier to track what's what when you have multiple logs
Instead of:
console.log(user)
console.log(posts)
Do this:
console.log({ user, posts })
You get labeled output in the console. Makes it way easier to track what's what when you have multiple logs
One of the weirdest patterns in React is the abandon render pattern
This is when you call a state updater function directly in the body of the component as its rendering
React will abandon the render and start again with a new value
Here's an example
This is when you call a state updater function directly in the body of the component as its rendering
React will abandon the render and start again with a new value
Here's an example
October 16, 2025 at 10:04 AM
One of the weirdest patterns in React is the abandon render pattern
This is when you call a state updater function directly in the body of the component as its rendering
React will abandon the render and start again with a new value
Here's an example
This is when you call a state updater function directly in the body of the component as its rendering
React will abandon the render and start again with a new value
Here's an example
When I use AI to code, it either helps me solve a very specific hard bug or it helps me not have to write a bunch of new code that follows the same patterns
Outside of that, it just gets in my way
No matter the model or the tool that I use
Outside of that, it just gets in my way
No matter the model or the tool that I use
October 15, 2025 at 2:56 PM
When I use AI to code, it either helps me solve a very specific hard bug or it helps me not have to write a bunch of new code that follows the same patterns
Outside of that, it just gets in my way
No matter the model or the tool that I use
Outside of that, it just gets in my way
No matter the model or the tool that I use
React 19.2 just introduced the useEffectEvent hook
This hook finally fixes one of the biggest problems that developers face when it comes to effects and dependency arrays
Finally, we can put this issue to rest and focus on shipping actual features
Here's how it works
This hook finally fixes one of the biggest problems that developers face when it comes to effects and dependency arrays
Finally, we can put this issue to rest and focus on shipping actual features
Here's how it works
October 15, 2025 at 9:56 AM
React 19.2 just introduced the useEffectEvent hook
This hook finally fixes one of the biggest problems that developers face when it comes to effects and dependency arrays
Finally, we can put this issue to rest and focus on shipping actual features
Here's how it works
This hook finally fixes one of the biggest problems that developers face when it comes to effects and dependency arrays
Finally, we can put this issue to rest and focus on shipping actual features
Here's how it works
So are we all moving away from Next.js now?
October 14, 2025 at 2:57 PM
So are we all moving away from Next.js now?
I'm currently filming a course on design patterns in React
This is by far the best course on this topic. Nothing else compares
Most other articles/courses repeat the same 5 outdated patterns over and over again
My course goes deep, and shows you patterns you can use today
This is by far the best course on this topic. Nothing else compares
Most other articles/courses repeat the same 5 outdated patterns over and over again
My course goes deep, and shows you patterns you can use today
October 3, 2025 at 9:58 AM
I'm currently filming a course on design patterns in React
This is by far the best course on this topic. Nothing else compares
Most other articles/courses repeat the same 5 outdated patterns over and over again
My course goes deep, and shows you patterns you can use today
This is by far the best course on this topic. Nothing else compares
Most other articles/courses repeat the same 5 outdated patterns over and over again
My course goes deep, and shows you patterns you can use today
You can figure out almost anything if you just keep trying long enough
Most developers quit right before they would have succeeded
The difference isn't talent, it's just staying in the game a bit longer
Most developers quit right before they would have succeeded
The difference isn't talent, it's just staying in the game a bit longer
October 2, 2025 at 10:04 AM
You can figure out almost anything if you just keep trying long enough
Most developers quit right before they would have succeeded
The difference isn't talent, it's just staying in the game a bit longer
Most developers quit right before they would have succeeded
The difference isn't talent, it's just staying in the game a bit longer
If you're using functions in your React components, then this is the best pattern that you can use
It gives you all of the benefits of a reusable function, while keeping the flexibility of how you might use it
Here's the code:
It gives you all of the benefits of a reusable function, while keeping the flexibility of how you might use it
Here's the code:
October 1, 2025 at 10:04 AM
If you're using functions in your React components, then this is the best pattern that you can use
It gives you all of the benefits of a reusable function, while keeping the flexibility of how you might use it
Here's the code:
It gives you all of the benefits of a reusable function, while keeping the flexibility of how you might use it
Here's the code: