rescript-lang/rescript

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ReScript is a robustly typed language that compiles to efficient and human-readable JavaScript.

Stars: 7.5k
Forks: 485
Open beginner issues: 0
Indexed issues: 106
Avg merge: 1d 2h
Merged PRs (30d): 55

Dominant language: OCaml
License: No license data
Last GitHub push: Sep 16, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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106 open issues indexed

update message to say that BigInts are supported in @unboxed variants Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

rescript-lang/rescript#7964 · 5 comments · Opened Oct 14, 2025
long matches in switch statements mutline-formats records (but moving to next line is better) Open

formatter

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rescript-lang/rescript#7963 · Opened Oct 14, 2025
switch-branch with multi-match branch is formatted weirdly Open

formatter

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rescript-lang/rescript#7962 · 2 comments · Opened Oct 14, 2025
[bug] @as can create type problems Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rescript-lang/rescript#7957 · 2 comments · Opened Oct 13, 2025
Remove usage of Js_OO Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

rescript-lang/rescript#7956 · Opened Oct 13, 2025
[bug] error reporting for res/resi/ conflict is hard to parse? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rescript-lang/rescript#7950 · 1 comment · Opened Oct 12, 2025
broken @as in external does weird things Open

Difficulty 3/5 1-2 days Newbie friendliness 28/100

rescript-lang/rescript#7948 · 2 comments · Opened Oct 11, 2025
formatter won't keep multiline for exceptions Open

formatter

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rescript-lang/rescript#7946 · Opened Oct 11, 2025
[bug?] functors are not uncurried Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

rescript-lang/rescript#7942 · 2 comments · Opened Oct 9, 2025
formatter aggressively reformats externs into a mess Open

formatter syntax

Difficulty 5/5 Over a week Newbie friendliness 25/100

rescript-lang/rescript#7941 · 12 comments · Opened Oct 8, 2025
Code owners file Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

rescript-lang/rescript#7922 · 2 reactions · Opened Sep 24, 2025
Compiler prevents adding attributes in front of { Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rescript-lang/rescript#7814 · 2 comments · Opened Aug 28, 2025
Use varialbe keys with dict{} Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

rescript-lang/rescript#7765 · 1 comment · 2 reactions · Opened Aug 12, 2025
Rewatch should recreate file after re-run of watch Open

build

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rescript-lang/rescript#7728 · Opened Jul 27, 2025
[reanalyze] rename @raises to @throws Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rescript-lang/rescript#7680 · 2 comments · Opened Jul 20, 2025
[reanalyze] [bug] division_by_zero exception analysis should check constant denominators Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rescript-lang/rescript#7679 · 1 reaction · Opened Jul 20, 2025
[reanalyze] [bug] panic calls should not result in suggested annotations Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rescript-lang/rescript#7678 · Opened Jul 20, 2025
[reanalyze] [bug] nested functions trigger @raises annotation Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

rescript-lang/rescript#7677 · Opened Jul 20, 2025
Investigate allowing floats and negative numbers as polyvariants Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rescript-lang/rescript#7573 · Opened Jun 21, 2025
Integer/Char pattern matching output is not optimal Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rescript-lang/rescript#7511 · 1 comment · Opened May 23, 2025
The parser does not ignore subsequent open multi-line comment /* inside /** or /* Open

syntax

rescript-lang/rescript#7508 · 1 reaction · 1 assignee · Opened May 23, 2025
Completions defined in `editor.autocomplete` don't work on type aliases Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

rescript-lang/rescript#7501 · 3 comments · Opened May 22, 2025
Optimize option chaining Open

enhancement

rescript-lang/rescript#7457 · 6 reactions · 1 assignee · Opened May 10, 2025
JSX preserve mode: unused import of "react/jsx-runtime" Open

rescript-lang/rescript#7433 · 6 comments · 1 assignee · Opened May 6, 2025
Clean up/optimize @return(undefined_to_opt) etc. Open

cleanup

Difficulty 5/5 Over a week Newbie friendliness 28/100

rescript-lang/rescript#7428 · 2 comments · Opened May 5, 2025
First class modules and dynamic import Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

rescript-lang/rescript#7389 · 1 comment · Opened Apr 10, 2025
Consider allowing inline records in `external` definitions Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

rescript-lang/rescript#7386 · 1 comment · 1 reaction · Opened Apr 10, 2025
Compiler safeguards when defining a __proto__ field Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rescript-lang/rescript#7343 · 1 comment · 1 reaction · Opened Mar 16, 2025
Editor completions for extensions to builtin types Open

editor

rescript-lang/rescript#7329 · 3 comments · 1 assignee · Opened Mar 11, 2025
Should use `in` for optional fields check Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rescript-lang/rescript#7313 · 5 comments · Opened Feb 22, 2025
Weird formatting when coercing types with `:>` Open

syntax

Difficulty 3/5 1-2 days Newbie friendliness 35/100

rescript-lang/rescript#7175 · 2 comments · Opened Nov 25, 2024
Request for @functionExpression attribute to opt-out from arrow functions Open

enhancement

rescript-lang/rescript#7061 · 10 comments · 1 assignee · Opened Sep 30, 2024
Integrate embed-lang into Rewatch Open

build

rescript-lang/rescript#7053 · 2 assignees · Opened Sep 26, 2024
RFC: Revise `char` primitive Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

rescript-lang/rescript#7028 · 10 comments · 5 reactions · Opened Sep 8, 2024
Get rid of `@as(json` hack for default arguments of external functions Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

rescript-lang/rescript#7027 · 1 comment · Opened Sep 8, 2024
Resolve syntax (printer) bugs for v12 Open

syntax

rescript-lang/rescript#6995 · 1 assignee · Opened Aug 31, 2024
Error Message Improvements Open

enhancement

rescript-lang/rescript#6975 · 1 comment · 1 assignee · Opened Aug 25, 2024
Support try...finally Open

enhancement

rescript-lang/rescript#6974 · 2 comments · 1 reaction · 1 assignee · Opened Aug 25, 2024
Custom ReScriptError class Open

enhancement

rescript-lang/rescript#6972 · 2 comments · 1 assignee · Opened Aug 25, 2024
Clean and modernize JS codebase Open

enhancement

rescript-lang/rescript#6971 · 1 assignee · Opened Aug 25, 2024
Uncapitalized cmi path in the error message Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

rescript-lang/rescript#6914 · 2 comments · Opened Jul 26, 2024
Variables with reserved keywords renamed in output, but not reflected in generated typescript Open

rescript-lang/rescript#6871 · 4 comments · 1 reaction · 1 assignee · Opened Jul 11, 2024
Add rewatch as an alternative build system to eventually replace bsb Open

build infrastructure

rescript-lang/rescript#6760 · 7 comments · 1 reaction · 1 assignee · Opened May 23, 2024
Record spread from smaller to bigger record type set doesn't work Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rescript-lang/rescript#6505 · 6 comments · 1 reaction · Opened Dec 3, 2023
Smart linebreak for expressions Open

syntax

rescript-lang/rescript#6432 · 6 comments · 2 reactions · 1 assignee · Opened Oct 10, 2023
Unintelligible error message with @return(nullable) Open

enhancement

rescript-lang/rescript#6093 · 6 comments · 1 assignee · Opened Mar 22, 2023
Allow to build hyphenated filename Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rescript-lang/rescript#5950 · 28 comments · 6 reactions · Opened Jan 24, 2023
Raising exceptions can generate invalid JavaScript Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

rescript-lang/rescript#5924 · 5 comments · Opened Jan 2, 2023
Optimizations not applied when record has an optional field Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

rescript-lang/rescript#5616 · 16 comments · Opened Aug 26, 2022
Add AST info capability Open

playground

Difficulty 5/5 Over a week Newbie friendliness 25/100

rescript-lang/rescript#5405 · 5 comments · 3 reactions · Opened Jun 1, 2022

rescript-lang/rescript

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