Add JSNation for javascript, typescript

[confs-tech-bot]

Conference information

Website: https://jsnation.com
CFP: https://gitnation.com/events/jsnation-2026/cfp
Bluesky: jsnation.gitnation.org

Github: @olga1510
Twitter: https://twitter.com/@thejsnation

// javascript, typescript

{
  "name": "JSNation",
  "url": "https://jsnation.com",
  "startDate": "2026-06-11",
  "endDate": "2026-06-15",
  "city": "Amsterdam",
  "country": "Netherlands",
  "online": true,
  "locales": "EN",
  "cocUrl": "https://gitnation.com/coc?utm_source=catalogue&utm_medium=jsn2026coc_github",
  "cfpUrl": "https://gitnation.com/events/jsnation-2026/cfp",
  "cfpEndDate": "2026-03-02",
  "bluesky": "jsnation.gitnation.org",
  "twitter": "@thejsnation"
}

[github-actions]

This PR appears to be non-dev-related based on conference content analysis. It has been labeled as non-dev-related. If you believe this is an error, please let us know. Thank you!

[github-actions]

Conferences not in the right order,

please run the following command locally: npm run reorder-confs
or run the job reorder job for this branch

[github-actions]

Error: Found duplicate conferences: JSNation

File: conferences/2026/javascript.json:178
File: conferences/2026/typescript.json:42
File: conferences/2026/javascript.json:193
Difference in field endDate: "2026-06-15" vs "2026-06-16"
Difference in field cocUrl: "https://gitnation.com/coc?utm_source=catalogue&utm_medium=jsn2026coc_github" vs "https://gitnation.com/coc"
Difference in field bluesky: "jsnation.gitnation.org" vs "undefined"
Difference in field twitter: "@thejsnation" vs "undefined"
Potential Duplicate PR: #8077 Add JSNation for javascript

[github-actions]

Conferences not in the right order,

please run the following command locally: npm run reorder-confs
or run the job reorder job for this branch