function event_handler_invalid(handler, suggestion) {
	if (DEV) {
		console.warn(`%c[svelte] event_handler_invalid\n%c${handler} should be a function. Did you mean to ${suggestion}?\nhttps://svelte.dev/e/event_handler_invalid`, bold, normal);
	} else {
		console.warn(`https://svelte.dev/e/event_handler_invalid`);
	}
}
%handler% should be a function. Did you mean to %suggestion%?
@param {string} handler
@param {string} suggestion