I’m building a project that is a bunch of plain HTML files with plain CSS and JS – there is no build step. I’m deploying this project to a server where I cannot control the headers being sent.

Because I can’t control the headers, I needed to add Speculation Rules by adding the following snippet to each and every HTML file:

<script type="speculationrules">
	{
		"prerender": [{
			"source": "document",
			"where": {
				"href_matches": "/*"
			},
			"eagerness": "moderate"
		}]
	}
</script>

This is very repetitive. I kinda assumed I would be able to do the following to keep things DRY, but turns out this is not possible:

<script type="speculationrules" src="file-with-speculation-rules.json"></script>

Hereby requesting to consider this feature request.