Can you configure collection style for maps and sequences separately?

[marcusolsson]

I want to configure the collection style for maps and sequences separately. Specifically, block for maps and flow for sequences.

It looks like I could set the flow option on the CreateNode options, but I'm not sure how I'd use it with the stringify API.

[slingshotsys]

I know this is old, but I have the same question. Did you ever figure this out?

[eemeli]

There's no built-in option for this, but if you first build a Document from your JS value, you can use a visitor to set node.flow = true on all sequences, and only then serialize the document: https://eemeli.org/yaml/#finding-and-modifying-nodes

[slingshotsys]

Perfect, thanks!

In case it's helpful to anyone else, the following worked for me:

// load the data
const doc = new YAML.Document(data);
// display sequences of strings inline (flow) but keep Maps and nested or more elaborate sequences as blocks
YAML.visit(doc, {
  Seq(key, node) {
	  node.flow = node.items.every((item) => typeof item.value === 'string');
  },
});

const yaml_string = doc.toString();