Courtney Yatteau
@cyatteau.bsky.social
Developer Advocate at Esri | International Conference Speaker | Former Math/CS Educator | opinions = my own | http://youtube.com/@c_yatteau
Joined the caricature trend ✅
Former teacher turned Dev Advocate, still educating… just with maps and code now 😄🗺️
Former teacher turned Dev Advocate, still educating… just with maps and code now 😄🗺️
February 14, 2026 at 5:22 PM
Joined the caricature trend ✅
Former teacher turned Dev Advocate, still educating… just with maps and code now 😄🗺️
Former teacher turned Dev Advocate, still educating… just with maps and code now 😄🗺️
February 13, 2026 at 9:02 PM
Day.js is a great shortcut for timestamp UX.
calendar() gives human labels like "Today" and "Tomorrow", and tz() handles real time zones (built on the UTC plugin).
#JavaScript #OpenSource #WebDev
calendar() gives human labels like "Today" and "Tomorrow", and tz() handles real time zones (built on the UTC plugin).
#JavaScript #OpenSource #WebDev
February 13, 2026 at 6:24 PM
Day.js is a great shortcut for timestamp UX.
calendar() gives human labels like "Today" and "Tomorrow", and tz() handles real time zones (built on the UTC plugin).
#JavaScript #OpenSource #WebDev
calendar() gives human labels like "Today" and "Tomorrow", and tz() handles real time zones (built on the UTC plugin).
#JavaScript #OpenSource #WebDev
Happy Internet Friends Day 🫶
Shoutout to everyone who makes tech education feel welcoming. You make the internet better.
Shoutout to everyone who makes tech education feel welcoming. You make the internet better.
February 13, 2026 at 4:18 PM
Happy Internet Friends Day 🫶
Shoutout to everyone who makes tech education feel welcoming. You make the internet better.
Shoutout to everyone who makes tech education feel welcoming. You make the internet better.
Developer Summit at Esri FedGIS wrapped yesterday. My colleagues and I shared demos highlighting the latest enhancements across ArcGIS developer technology.
Missed it? Feel free to message me, I'm happy to share some demos.
#FedGIS2026 #Esri #ArcGIS
Missed it? Feel free to message me, I'm happy to share some demos.
#FedGIS2026 #Esri #ArcGIS
February 12, 2026 at 10:10 PM
Developer Summit at Esri FedGIS wrapped yesterday. My colleagues and I shared demos highlighting the latest enhancements across ArcGIS developer technology.
Missed it? Feel free to message me, I'm happy to share some demos.
#FedGIS2026 #Esri #ArcGIS
Missed it? Feel free to message me, I'm happy to share some demos.
#FedGIS2026 #Esri #ArcGIS
Day 1 of Esri FedGIS done ✅ I'd love to see you at the Developer Summit at FedGIS tomorrow at 1 PM.
#FedGIS2026 #Esri #ArcGIS
#FedGIS2026 #Esri #ArcGIS
February 11, 2026 at 1:15 AM
Day 1 of Esri FedGIS done ✅ I'd love to see you at the Developer Summit at FedGIS tomorrow at 1 PM.
#FedGIS2026 #Esri #ArcGIS
#FedGIS2026 #Esri #ArcGIS
I got to nerd out about math today on a podcast! 🤓
We chatted about math + web dev, learning through visuals, and why curiosity never stops. Episode comes out in a couple weeks.
Have you ever had a "wait… THAT'S what it means?!" math moment? If so, I'd love to hear it!
#WebDev #STEM #JS #Math
We chatted about math + web dev, learning through visuals, and why curiosity never stops. Episode comes out in a couple weeks.
Have you ever had a "wait… THAT'S what it means?!" math moment? If so, I'd love to hear it!
#WebDev #STEM #JS #Math
February 5, 2026 at 9:07 PM
Guided UI walkthroughs in a few lines of JS. Bonus guided map builder app 🗺️
#OpenSource #JavaScript #WebDev #UI
#OpenSource #JavaScript #WebDev #UI
February 5, 2026 at 2:09 PM
Guided UI walkthroughs in a few lines of JS. Bonus guided map builder app 🗺️
#OpenSource #JavaScript #WebDev #UI
#OpenSource #JavaScript #WebDev #UI
One week until the Developer Summit General Session at Esri FedGIS 👩🏻💻🗺️
Join us in Ballroom A on Feb 11, then stay for technical sessions. My colleagues and I will be sharing live demos and would love to meet everyone!
See the event map: webapps-cdn.esri.com/CDN/fedgis-e...
#FedGIS2026 #Esri #GIS
Join us in Ballroom A on Feb 11, then stay for technical sessions. My colleagues and I will be sharing live demos and would love to meet everyone!
See the event map: webapps-cdn.esri.com/CDN/fedgis-e...
#FedGIS2026 #Esri #GIS
February 4, 2026 at 6:13 PM
One week until the Developer Summit General Session at Esri FedGIS 👩🏻💻🗺️
Join us in Ballroom A on Feb 11, then stay for technical sessions. My colleagues and I will be sharing live demos and would love to meet everyone!
See the event map: webapps-cdn.esri.com/CDN/fedgis-e...
#FedGIS2026 #Esri #GIS
Join us in Ballroom A on Feb 11, then stay for technical sessions. My colleagues and I will be sharing live demos and would love to meet everyone!
See the event map: webapps-cdn.esri.com/CDN/fedgis-e...
#FedGIS2026 #Esri #GIS
February 4, 2026 at 12:00 PM
Code for the shadow app I posted yesterday is up 👩🏻💻 This demo version is rule-based, and I also built an AI-powered version with a quick video walkthrough.
🗺️ Code: codepen.io/cyatteau/pen...
🎥 Video: www.youtube.com/watch?v=ooj5...
#JavaScript #AI #GIS #ArcGIS
🗺️ Code: codepen.io/cyatteau/pen...
🎥 Video: www.youtube.com/watch?v=ooj5...
#JavaScript #AI #GIS #ArcGIS
February 3, 2026 at 8:32 PM
Code for the shadow app I posted yesterday is up 👩🏻💻 This demo version is rule-based, and I also built an AI-powered version with a quick video walkthrough.
🗺️ Code: codepen.io/cyatteau/pen...
🎥 Video: www.youtube.com/watch?v=ooj5...
#JavaScript #AI #GIS #ArcGIS
🗺️ Code: codepen.io/cyatteau/pen...
🎥 Video: www.youtube.com/watch?v=ooj5...
#JavaScript #AI #GIS #ArcGIS
Build your own Leaflet map for FOSSFeb Day 1. New open source tutorial every weekday in February.
Link to game: leaflet-game.netlify.app
#FOSSFeb #Leaflet #JavaScript #OpenSource
Link to game: leaflet-game.netlify.app
#FOSSFeb #Leaflet #JavaScript #OpenSource
February 3, 2026 at 1:13 AM
Build your own Leaflet map for FOSSFeb Day 1. New open source tutorial every weekday in February.
Link to game: leaflet-game.netlify.app
#FOSSFeb #Leaflet #JavaScript #OpenSource
Link to game: leaflet-game.netlify.app
#FOSSFeb #Leaflet #JavaScript #OpenSource
It's FOSSFeb (Free and Open Source Software February) 💙 Let's celebrate open source web dev all month!
What project should I feature? Comment it below.
#JavaScript #OpenSource #WebDev
What project should I feature? Comment it below.
#JavaScript #OpenSource #WebDev
February 1, 2026 at 4:47 PM
It's FOSSFeb (Free and Open Source Software February) 💙 Let's celebrate open source web dev all month!
What project should I feature? Comment it below.
#JavaScript #OpenSource #WebDev
What project should I feature? Comment it below.
#JavaScript #OpenSource #WebDev
It's Fun at Work Day and I'm like... wait, that’s just my job! 😄🗺️
I get to build demos that show developers fun ways to use Esri services.
If you missed it, yesterday I posted a map tile puzzle app I built.
arcgis-puzzle-game.netlify.app
See the code: codepen.io/cyatteau/pen...
#ArcGIS #maps
I get to build demos that show developers fun ways to use Esri services.
If you missed it, yesterday I posted a map tile puzzle app I built.
arcgis-puzzle-game.netlify.app
See the code: codepen.io/cyatteau/pen...
#ArcGIS #maps
January 30, 2026 at 7:05 PM
It's Fun at Work Day and I'm like... wait, that’s just my job! 😄🗺️
I get to build demos that show developers fun ways to use Esri services.
If you missed it, yesterday I posted a map tile puzzle app I built.
arcgis-puzzle-game.netlify.app
See the code: codepen.io/cyatteau/pen...
#ArcGIS #maps
I get to build demos that show developers fun ways to use Esri services.
If you missed it, yesterday I posted a map tile puzzle app I built.
arcgis-puzzle-game.netlify.app
See the code: codepen.io/cyatteau/pen...
#ArcGIS #maps
If you like puzzles and maps, this is for you 🧩🗺️
For Puzzle Day, I built a map tile puzzle using the ArcGIS Geocoding Service and the ArcGIS Static Basemap Tiles service.
Play now: lnkd.in/eKbJgj7z
Code coming soon 👩🏻💻
#ArcGIS #maps #puzzle
For Puzzle Day, I built a map tile puzzle using the ArcGIS Geocoding Service and the ArcGIS Static Basemap Tiles service.
Play now: lnkd.in/eKbJgj7z
Code coming soon 👩🏻💻
#ArcGIS #maps #puzzle
January 29, 2026 at 8:12 PM
If you like puzzles and maps, this is for you 🧩🗺️
For Puzzle Day, I built a map tile puzzle using the ArcGIS Geocoding Service and the ArcGIS Static Basemap Tiles service.
Play now: lnkd.in/eKbJgj7z
Code coming soon 👩🏻💻
#ArcGIS #maps #puzzle
For Puzzle Day, I built a map tile puzzle using the ArcGIS Geocoding Service and the ArcGIS Static Basemap Tiles service.
Play now: lnkd.in/eKbJgj7z
Code coming soon 👩🏻💻
#ArcGIS #maps #puzzle
Almost a year since FedGIS 2025, and FedGIS 2026 is just a couple weeks away. If you're going, say hi so I can watch for you!
www.esri.com/en-us/about/...
#FedGIS2026 #GIS #Esri #ArcGIS
www.esri.com/en-us/about/...
#FedGIS2026 #GIS #Esri #ArcGIS
January 23, 2026 at 7:02 PM
Almost a year since FedGIS 2025, and FedGIS 2026 is just a couple weeks away. If you're going, say hi so I can watch for you!
www.esri.com/en-us/about/...
#FedGIS2026 #GIS #Esri #ArcGIS
www.esri.com/en-us/about/...
#FedGIS2026 #GIS #Esri #ArcGIS
January 22, 2026 at 7:52 PM
January 22, 2026 at 3:34 PM
January 21, 2026 at 9:25 PM
January 17, 2026 at 6:07 PM
January 16, 2026 at 4:33 PM
Fresh squeezed + map glass = my map building fuel. 🧃🗺️ Mappy Fresh Squeezed Juice Day!
January 15, 2026 at 10:03 PM
Fresh squeezed + map glass = my map building fuel. 🧃🗺️ Mappy Fresh Squeezed Juice Day!