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Overview

This repo contains a simple example application demonstrating how to consume HCL from JavaScript. It consists over a simple HCL-to-HTML templating library converter in go, plus a small playground page. It exposes hcl/v2 to JS via the power of cross compilation.

But how?

The main app's entry point is index.js. That function just creates monaco (aka VSCode) instances to allow entering an HCL template and JSON data. It then periodically calls parse_hcl with the entered JSON/HCL.

And where is parse_hcl defined? Not in JS! Instead, it's implemented in go/main.go. That function is compiled to WASM by running:

GOOS=js GOARCH=wasm go build -o ../public/hcl_wasm.wasm main.go

main.go just contains a simple wrapper around the hcl/v2 library that turns HCL blocks into DOM elements.