Source map for es-module-shims.min.js is incorrect

[nishikantparmariam]

ALL software version info

Software Version Info

panel==1.6.0
bokeh==3.6.2
param==2.2.0

Description of expected behavior and the observed behavior

There should not be any error in terminal upon opening Chrome Browser console when viewing a Panel app.

Complete, minimal, self-contained example code that reproduces the issue

A normal notebook.ipynb file having this content:

import panel as pn
pn.extension()
pn.Row('Hello World').servable()

Run it using:

panel serve notebook.ipynb --log-level debug --port 8000 --allow-websocket-origin <host>:8000

Go to <host>:8000 and then open Chrome Browser console and we would see below error in terminal:

404 GET /sm/731b32944388c6036aacf97199508abc904b39281fd18a3b471e5f96a2ad4b3d.map (10.215.23.98) 0.48ms

Upon debugging I found it comes from es-module-shims.min.js - check its last line.

Stack traceback and/or browser JavaScript console output

[20250204 05:52:25:183 viewable.py:563 DEBUG] Session 140000925635664 received events {'dark_mode': False, 'device_pixel_ratio': 1, 'language': 'en-US', 'webdriver': False, 'timezone': 'Asia/Calcutta', 'timezone_offset': -330, 'webgl': True}
[20250204 05:52:25:185 viewable.py:563 DEBUG] Session 140000925635664 finished processing events {'dark_mode': False, 'device_pixel_ratio': 1, 'language': 'en-US', 'webdriver': False, 'timezone': 'Asia/Calcutta', 'timezone_offset': -330, 'webgl': True}
[20250204 05:52:30:468 viewable.py:563 DEBUG] Session 140000863166800 received events {'dark_mode': False, 'device_pixel_ratio': 1, 'language': 'en-US', 'webdriver': False, 'timezone': 'Asia/Calcutta', 'timezone_offset': -330, 'webgl': True}
[20250204 05:52:30:470 viewable.py:563 DEBUG] Session 140000863166800 finished processing events {'dark_mode': False, 'device_pixel_ratio': 1, 'language': 'en-US', 'webdriver': False, 'timezone': 'Asia/Calcutta', 'timezone_offset': -330, 'webgl': True}
404 GET /sm/731b32944388c6036aacf97199508abc904b39281fd18a3b471e5f96a2ad4b3d.map (10.215.23.98) 0.48ms

Screenshots or screencasts of the bug in action

• I may be interested in making a pull request to address this