Inject a intitial value in Starter

<div kll-ctrl="foo" kll-s-count="3" kll-s-msg="good"></div>

Exemple

// ctrl/foo.js
export const foo = {
	// Is not necessary to add key here,
	// but for read your controller, it's a good pratice
	state: {
		count: 0,
		msg: ''
	}
	onInit(state) {
			state.count = Number(state.count) //  '3' become 3
			console.log(state.msg) // input "good"
	}
}