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--experimental-strip-types does not work for STDIN #54035
Description
Version
v23.0.0-nightly202407253de7a4c374
Platform
Linux <machineName> 5.15.153.1-microsoft-standard-WSL2 #1 SMP Fri Mar 29 23:14:13 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Subsystem
typescript
What steps will reproduce the bug?
Good:
node --experimental-strip-types --eval 'const greeting: string = "hello"; console.log(greeting);'hello
(node:9012) ExperimentalWarning: Type Stripping is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
Bad:
echo 'const greeting: string = "hello"; console.log(greeting);' | node --experimental-strip-types(node:8861) ExperimentalWarning: Type Stripping is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
[stdin]:1
const greeting: string = "hello"; console.log(greeting);
^^^^^^^^
SyntaxError: Missing initializer in const declaration
at makeContextifyScript (node:internal/vm:185:14)
at node:internal/process/execution:107:22
at [stdin]-wrapper:6:24
at runScript (node:internal/process/execution:101:62)
at evalScript (node:internal/process/execution:136:3)
at node:internal/main/eval_stdin:32:5
at Socket.<anonymous> (node:internal/process/execution:237:5)
at Socket.emit (node:events:532:35)
at endReadableNT (node:internal/streams/readable:1696:12)
at process.processTicksAndRejections (node:internal/process/task_queues:82:21)
Node.js v23.0.0-nightly202407253de7a4c374
How often does it reproduce? Is there a required condition?
Always
What is the expected behavior? Why is that the expected behavior?
Per the docs, the expected behaviour is that --eval and STDIN are both supported:
Type stripping can be enabled for --eval and STDIN input. The module system will be determined by --input-type, as it is for JavaScript.
What do you see instead?
Instead we receive an error as if we had not passed the flag --experimental-strip-types.
It is clear from the (red) stderr that the flag was acknowledged by node.
Additional information
I wasn't sure from the docs if --input-type should be passed, but the CLI feedback is that only values of "module" or "commonjs" would work, and neither helped.
Activity
marco-ippolito commentedon Jul 25, 2024
So STDIN input was never meant to be supported, except eval, I guess its just a documentation issue.
doc: correct typescript stdin support
tchetwin commentedon Jul 25, 2024
Thanks!
doc: correct typescript stdin support
doc: correct typescript stdin support