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Other JS Engines and Deployments
There are many JS engines and deployments outside of web browsers. NodeJS is the most popular deployment, but there are many others for special use cases. Some optimize for low overhead and others optimize for ease of embedding within other applications. Since it was designed for ES3 engines, the library can be used in those settings! This demo tries to demonstrate a few alternative deployments.
Nashorn
Nashorn ships with Java 8. It includes a command-line tool jjs for running JS
scripts. It is somewhat limited but does offer access to the full Java runtime.
jjs does not provide a CommonJS require implementation. This demo uses a
shim
and manually requires the library.
The Java nio API provides the Files.readAllBytes method to read a file into
a byte array. To use in XLSX.read, the demo copies the bytes into a plain JS
array and calls XLSX.read with type "array".
duktape and skookum
Duktape is an embeddable JS engine written in C. The amalgamation makes integration extremely simple! Duktape understands the source code and can process binary strings out the box, but does not provide I/O or other standard library features.
To demonstrate compatibility with duktape, this demo uses the JS runtime from Skookum JS. Built upon the duktape engine, it adds a simple I/O interface to enable reading from files.