I recently came across this blog post from Ruud van Asseldonk titled “The YAML Document From Hell.” I’ve always heard that YAML has its pitfalls, but hadn’t looked into the details and thankfully hadn’t been affected, mainly due to my very infrequent and simple use of YAML. If you are in the same boat as me, I recommend reading that article now, as I almost can’t believe I’ve avoided any issues with it.

The article digs into the issues in the YAML spec itself and then describes what happens in Python’s PyYAML and Golang’s YAML library with an example file, the titular YAML document from hell. I wanted to see how things were in the JavaScript ecosystem.