musenalm/views/routes/suche/components/_fieldscript.gohtml

<script type="module">
	let fieldset = document.querySelector("fieldset.selectgroup");
	if (fieldset) {
		let checkboxes = Array.from(fieldset.querySelectorAll('input[type="checkbox"]'));
		fieldset.addEventListener("change", (event) => {
			let target = event.target;
			if (target.type === "checkbox") {
				let name = target.name;
				let checked = target.checked;
				if (!checked) {
					let allchecked = checkboxes.filter((checkbox) => checkbox.checked);
					if (allchecked.length === 0) {
						target.checked = true;
					}
				}
			}
		});
	}

	const form = document.getElementById("simplesearchform");
	let submitBtn = null;
	if (form) {
		submitBtn = form.querySelector("#submitbutton");
	}

	function checkValidity(f, btn) {
		if (f.checkValidity()) {
			btn.disabled = false;
		} else {
			btn.disabled = true;
		}
	}

	if (form && submitBtn) {
		checkValidity(form, submitBtn);
		form.addEventListener("input", (event) => {
			checkValidity(form, submitBtn);
		});
	}

	const lookupform = document.getElementById("lookupform");
	let lookupsubmitBtn = null;
	if (lookupform) {
		lookupsubmitBtn = lookupform.querySelector("#submitbutton");
	}

	if (lookupform && lookupsubmitBtn) {
		checkValidity(lookupform, lookupsubmitBtn);
		lookupform.addEventListener("input", (event) => {
			checkValidity(lookupform, lookupsubmitBtn);
		});
	}
</script>