Scoreboard
ChadScript's promise is simple: a program either behaves exactly like Node, or ChadScript refuses to compile it and says why. This page measures that promise on a corpus of 100 realistic TypeScript programs (tests/corpus): CLI tools, parsers, file-processing scripts, algorithms, class hierarchies, small interpreters and more, written the way people write TypeScript rather than for ChadScript.
Every program runs under Node and as a native binary (at -O0 and -O2), each in its own empty working directory. "Behaves exactly like Node" means the same standard output, the same standard error, the same exit code, and the same files left on disk, byte for byte.
| Programs | Share | |
|---|---|---|
| Programs that behave exactly like Node | 3 | 3% |
| Programs ChadScript refuses with a clear error | 97 | 97% |
| Programs where ChadScript is wrong (0 is the goal) | 0 | 0% |
| Programs where ChadScript crashes (0 is the goal) | 0 | 0% |
| Total | 100 |
A refusal is the safe outcome: you get a CS error code pointing at the construct and a suggested rewrite, and nothing runs wrongly. Each program in the last two rows is a tracked bug, marked @known-bug in the corpus.
By category
| Category | Programs | Exactly like Node | Refused | Wrong | Crashes |
|---|---|---|---|---|---|
| algorithms | 13 | 0 | 13 | 0 | 0 |
| async-io | 5 | 0 | 5 | 0 | 0 |
| cli | 9 | 2 | 7 | 0 | 0 |
| data-structures | 9 | 0 | 9 | 0 | 0 |
| errors | 5 | 0 | 5 | 0 | 0 |
| generics | 8 | 0 | 8 | 0 | 0 |
| interpreters | 5 | 0 | 5 | 0 | 0 |
| oop | 9 | 0 | 9 | 0 | 0 |
| parsing | 11 | 0 | 11 | 0 | 0 |
| scripts | 7 | 1 | 6 | 0 | 0 |
| simulation | 7 | 0 | 7 | 0 | 0 |
| text | 12 | 0 | 12 | 0 | 0 |
Top 15 reasons for refusing a program
These rank what to support next. A program refused for several reasons counts once under each. Codes link to their explanation on the error codes page.
| # | Code | Reason | Programs | Examples |
|---|---|---|---|---|
| 1 | CS1213 | regular expression literals are not supported yet | 30 | calc-interpreter.ts, case-convert.ts, ciphers.ts |
| 2 | CS1217 | default parameter values are not supported yet | 23 | animals.ts, bank-ledger.ts, brainfuck.ts |
| 3 | CS1233 | this value has a tuple type with different element types ([string, number]) | 16 | bank-ledger.ts, calc-interpreter.ts, case-convert.ts |
| 4 | CS1000 | indexing an object with a computed key is not supported | 15 | binary-search.ts, bitset.ts, brainfuck.ts |
| 5 | CS1000 | new Array is not supported | 11 | bank-queue-sim.ts, brainfuck.ts, ciphers.ts |
| 6 | CS1224 | Array.prototype.fill is not supported yet | 11 | bank-queue-sim.ts, brainfuck.ts, ciphers.ts |
| 7 | CS1000 | a class that extends the built-in Error is not supported | 10 | bank-ledger.ts, calc-interpreter.ts, cli-options.ts |
| 8 | CS1222 | Map.entries is not supported yet | 10 | calc-interpreter.ts, cli-stats.ts, csv-sales-report.ts |
| 9 | CS1222 | iterating a Map directly with for...of is not supported yet | 9 | build-order.ts, dice-probability.ts, dotenv-parser.ts |
| 10 | CS1220 | Object.entries is not supported yet | 8 | build-order.ts, case-convert.ts, cli-config-merge.ts |
| 11 | CS1214 | JSON.parse requires an explicit target type annotation | 6 | async-generators.ts, cli-config-merge.ts, cli-todo.ts |
| 12 | CS1223 | String.prototype.localeCompare is not supported yet | 6 | cli-options.ts, csv-sales-report.ts, log-analyzer.ts |
| 13 | CS1224 | Array.prototype.splice is not supported yet | 6 | async-queue.ts, bank-queue-sim.ts, cli-rpn.ts |
| 14 | CS1233 | this value has a type ChadScript does not support here ({ [key: string]: string; }) | 6 | json-parser.ts, log-analyzer.ts, markdown-to-html.ts |
| 15 | CS1233 | this value has a type ChadScript does not support here (Record<string, number>) | 6 | expense-tracker.ts, json-inventory.ts, number-words.ts |
Known wrong or crashing programs
None.
Regenerating
bun run scripts/scoreboard.ts reruns the corpus and rewrites this page. The corpus test in the slow lane fails when a program without a @known-bug note diverges from Node or crashes the compiler, and when a @known-bug program starts working.