Hacker ApprovedDepartments

Scala.js

Shares rank 4 of 6 transpilers by recommenders

Lets people write frontend code in Scala and is free and fun to use, though code sharing with GHCJS is thinner.

Lets people write frontend code in Scala and is free and fun to use, though code sharing with GHCJS is thinner.

7 people gave an opinion

recommend it
7
criticize it
0
approval share
100%
Each figure is one person. RecommendsCriticizes

Recommended in 6 of 13 months

  1. November 2025: recommended
  2. December 2025: not recommended
  3. January 2026: recommended
  4. February 2026: not recommended
  5. March 2026: recommended
  6. April 2026: not recommended
  7. May 2026: recommended
  8. June 2026: not recommended
  9. July 2026: not recommended
  10. August 2026: not recommended
  11. September 2026: recommended
  12. October 2026: recommended
  13. November 2026: not recommended (month in progress)

Why it doesn’t carry the badge

  • 7 people recommend itNeeds 10 or more, not met.
  • Nobody criticizes itNeeds 2 to 1 or better, met.
  • Recommended in 6 of 13 monthsNeeds 4 or more, met.

The same three rules apply to every product, and the badge can’t be bought. How the badge works

What people say about it

The reasons people give, with the number of comments that give each one. Open a reason to read what they said.

Why people recommend it

Each mark is one comment

  • Scala on the frontend

    “Full stack Scala with Scala.js on the frontend is so very nice.”

    Comment from 30 Jan 2026 in “The Sovereign Tech Fund Invests in Scala”

    “For the frontend, ScalaJS[0].”

    Comment from 19 Oct 2026 in “Java sealed classes and exhaustive pattern matching”
  • Fun and cool to use

    “ScalaJS is both fun and cool”

    Comment from 22 Jan 2026 in “I am moving away from Scala”

What people warn about

Each mark is one comment

  • Code sharing with GHCJS is thinner

    “Scala.js and GHCJS are essentially separate compilation targets with thinner sharing stories”

    Comment from 27 Mar 2026 in “Swift 6.3 Released”

Other transpilers people recommend

The four most recommended other transpilers, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.

Scala.js compared with 4 alternatives
ProductRecommendCriticizeApprovalMonthsOwnedBadge
T-Ruby11665%2——
Eurydice8280%2——
crustc8189%1——
Scala.jsThis page70100%6——
TeaVM70100%4——
See all 6 transpilers, ranked

What people said

4 of the 8 comments that mention it, newest first. Each links to the original comment.

“For the frontend, ScalaJS[0].”

RecommendsComment from 19 Oct 2026 in “Java sealed classes and exhaustive pattern matching”

“Scala.js and GHCJS are essentially separate compilation targets with thinner sharing stories”

MixedComment from 27 Mar 2026 in “Swift 6.3 Released”

“Full stack Scala with Scala.js on the frontend is so very nice.”

RecommendsComment from 30 Jan 2026 in “The Sovereign Tech Fund Invests in Scala”

“ScalaJS is both fun and cool”

RecommendsComment from 22 Jan 2026 in “I am moving away from Scala”

Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.