vscode-extension-samples/custom-data-sample/package.json

{
	"name": "custom-data-sample",
	"description": "Custom Data sample extension for VS Code",
	"version": "0.0.1",
	"publisher": "vscode-samples",
	"repository": "https://github.com/Microsoft/vscode-extension-samples",
	"engines": {
		"vscode": "^1.38.0"
	},
	"contributes": {
		"html": {
			"customData": [
				"./html.html-data.json"
			]
		},
		"css": {
			"customData": [
				"./css.css-data.json"
			]
		}
	}
}