[BUG] ob-js "SyntaxError: Unexpected end of input" when code block ends with comment

[sgherdao]

Hello,

I would like to report a bug, I am using the following versions

GNU Emacs 28.2

Org mode version 9.6.1

Node v19.9.0

The following code snippet fails to execute

#+begin_src js

console.log("Hello Friends!");

// -> logs "Hello Friends"

#+end_src

I encounter the following error message:

#+begin_src text

/tmp/js-script-dn2Wrp:2

// -> logs "Hello Friends"}()));

SyntaxError: Unexpected end of input

    at internalCompileFunction (node:internal/vm:73:18)

    at wrapSafe (node:internal/modules/cjs/loader:1195:20)

    at Module._compile (node:internal/modules/cjs/loader:1239:27)

    at Module._extensions..js (node:internal/modules/cjs/loader:1329:10)

    at Module.load (node:internal/modules/cjs/loader:1133:32)

    at Module._load (node:internal/modules/cjs/loader:972:12)

    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:83:12)

    at node:internal/main/run_main_module:23:47

#+end_src

Upon further inspection, I found that the generated _javascript_ code in the tmp file contains an unbalanced brace and parentheses, as shown below:

#+begin_src js

require('process').stdout.write(require('util').inspect(function(){console.log("Hello Friends!");

// -> logs "Hello Friends"}()));

#+end_src

Since the last line of the code snippet contains a comment the brace and parens are unbalanced

This seems to point to the way the following variable is defined in ob-js.el

#+begin_src emacs-lisp

(defvar org-babel-js-function-wrapper

  "require('process').stdout.write(require('util').inspect(function(){%s}()));"

  "_javascript_ code to print value of body.")

#+end_src

As a simple fix, I have added a \n after %s

#+begin_src emacs-lisp

(defvar org-babel-js-function-wrapper

  "require('process').stdout.write(require('util').inspect(function(){%s\n}()));"

  "_javascript_ code to print value of body.")

#+end_src

Please let me know if you need any additional information or if there's anything else I can do to help resolve this issue.

Best regards,

--

Salah