If the scope is limited to ESP32/ESP8266, it seems technically possible to run QuickJS on them.
From Fabrice Bellard himself:
> QuickJS should be able to run on the ESP32 platform as it is OS independent (as you said, quickjs-libc.c is not part of the engine). For simple scripts it should fit in the available RAM.
http://www.espruino.com/
https://bellard.org/quickjs/