svelte/test/validator/samples/transition-missing/warnings.json

[{
	"code": "missing-declaration",
	"message": "'foo' is not defined. Consider adding a <script> block with 'export let foo' to declare a prop",
	"start": {
		"line": 1,
		"column": 5,
		"character": 5
	},
	"end": {
		"line": 1,
		"column": 11,
		"character": 11
	},
	"pos": 5
}]