Provide a sandbox to PDF.js.

Run:

node build.js --compile --output my_output_dir

it will create a Docker image with emsdk and then run it. The generated quickjs-eval.js will be in my_output_dir.

In order to update quickjs to a specific revision, change the commit hash in Dockerfile and then run:

node build.js --create

to create a new docker image and then

node build.js --compile --output my_output_dir

to compile. The short version is:

node build.js -Cco my_output_dir

The code is released under MIT license.