[Pkg-javascript-devel] Bug#922824: sourceMappingURL in minified js seems to point to the wrong location

[Enrico Zini]

Package: libjs-bootstrap4
Version: 4.2.1+dfsg2-2
Severity: normal

Hello,

Thank you for packaging bootstrap.

The minified bootstrap4 javascript file is currently distributed in
these two paths:

  /usr/lib/nodejs/bootstrap/dist/js/bootstrap.min.js
  /usr/share/javascript/bootstrap4/js/bootstrap.min.js

and they come with a sourceMappingURL of:

  //# sourceMappingURL=dist/js/bootstrap.js.map

If I make one of those paths accessible on the web and include bootstrap
with something like:

  <script src="{{static_url('bootstrap4/js/bootstrap.min.js')}}"></script>

Then I see the browser make this failed request on my HTTP server:

  404 GET /static/bootstrap4/js/dist/js/bootstrap.js.map

I tried to look up how sourceMappingURL works:

  https://stackoverflow.com/questions/38427991/which-is-the-base-url-of-sourcemappingurl-relative-from-html-or-js

and it looks to me like bootstrap.min.js should contain something like
"sourceMappingURL=bootstrap.js.map" to have it being found alongside the
.min.js version.


Enrico

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-1-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8), LANGUAGE=en_IE:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libjs-bootstrap4 depends on:
ii  libjs-popper.js  1.14.6+ds2-1

libjs-bootstrap4 recommends no packages.

libjs-bootstrap4 suggests no packages.

-- no debconf information