Mirror of forum.nim-lang.org

6731 :: List with the modules of the Standard library which do not work with the JS backend

• halloleo (orginal) [2020-08-27T08:30:03+02:00] view original

  I am curious which modules of the Standard library do and which do not work with the JS backend.

  I hoped pure libraries would all be JS-compatible, but this is not the case: For example osproc does not seem to work with the JS backend.

  Is there a list with the modules of the Standard library which do not work with the JS backend?

---

• ElegantBeef (orginal) [2020-08-27T08:37:29+02:00] view original

  You can see about the JS supported features here. The js backend is mainly aimed for the browser, so things like osproc clearly cant be used.

---

• halloleo (orginal) [2020-08-27T08:41:13+02:00] view original

  I just re-read the page you referenced: Do I deduct correctly that this means from the Standard Library only strutils, math, and times are compatible with JS?

---

• ElegantBeef (orginal) [2020-08-27T08:57:31+02:00] view original

  No, many modules work like bitops, any module that does anything in that list will most likely not be supported.

---

• juancarlospaco (orginal) [2020-08-27T15:02:13+02:00] view original

  Usually the ones that work on NimScript may work on JavaScript, and theres a list on the NimScript documentation.

---

• Yardanico (orginal) [2020-08-27T15:05:54+02:00] view original

  Just so you know - osproc wouldn't make sense to support with the JS backend anyway, since Nim JS backend is made for the front-end stuff, not node.js backend. Node.js support is there only for the test suite

---

• halloleo (orginal) [2020-08-28T04:23:53+02:00] view original

  Usually the ones that work on NimScript may work on JavaScript, and theres a list on the NimScript documentation.

  That is a great hint, @juancarlospaco. Thanks!

---

• halloleo (orginal) [2020-08-28T04:47:13+02:00] view original

  I aggregated the info from this thread in a page on the Nim wiki : Standard library and the JavaScript backend

  Thanks for all the input!

---

• DeletedUser (orginal) [2020-08-28T06:46:22+02:00] view original

  In case documentation isn't updated, there are tests for standard library imports for JS and NimScript, but all these do is test that these modules compile on those backends. You should try modules that are in these tests that you're not sure about, then report if they don't work properly or you're presented with an issue you don't understand. Nim docgen unfortunately cannot automatically display backend-specificity for procs and types so some things might be hard to figure out.

---