tangled.org
Monorepo for Tangled
tangled.org
web/ui/components: fix dropdown
Signed-off-by: eti <eti@eti.tf>
author
eti
committer
dawn
date
(Jul 23, 2026, 6:48 PM +0300)
commit
6d9a994a
6d9a994ae128751f5f43cc6e2a30eaee6eeddd08
parent
655fa31d
655fa31d051a777be64e206e6ff13d210d90969c
change-id
pvvkltmt
pvvkltmtytytmkzqqvyyswxpwnqssrxq
+24
-20
+24
-20
web/src/lib/components/ui/Dropdown.svelte
+24
-20
web/src/lib/components/ui/Dropdown.svelte
···
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// opening one dropdown in a group closes its siblings.
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const groups = new SvelteMap<string, SvelteSet<() => void>>();
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-
let idCounter = 0;
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function nextId() {
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idCounter += 1;
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return `dropdown-menu-${idCounter}`;
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}
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-
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function registerDropdown(group: string | undefined, close: () => void) {
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if (!group) return () => {};
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let set = groups.get(group);
···
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set.add(close);
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return () => {
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set.delete(close);
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if (set && set.size === 0) groups.delete(group);
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if (set.size === 0) groups.delete(group);
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};
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}
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···
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let root = $state<HTMLElement>();
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let triggerWrapper = $state<HTMLElement>();
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let triggerButtonEl = $state<HTMLElement>();
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const fallbackId = nextId();
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const fallbackId = $props.id();
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const menuId = $derived(id ?? fallbackId);
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const focusTrigger = () => {
···
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triggerButtonEl?.focus();
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}
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};
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let items: HTMLElement[] = $state([]);
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// intentionally not $state: only used for imperative focus, and reactive
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// reads inside DropdownItem's register $effect would loop it forever
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let items: HTMLElement[] = [];
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const close = () => {
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open = false;
···
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items[wrapped]?.focus();
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};
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const openAndFocusFirst = () => {
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open = true;
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closeGroupExcept(group, close);
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};
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-
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const onTriggerKeydown = (event: KeyboardEvent) => {
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if (!open && (event.key === "ArrowDown" || event.key === "ArrowUp")) {
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event.preventDefault();
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openAndFocusFirst();
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open = true;
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closeGroupExcept(group, close);
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}
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};
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···
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close();
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focusTrigger();
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break;
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case "Tab":
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close();
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break;
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}
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};
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···
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setContext("dropdown-close", close);
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setContext("dropdown-register", (el: HTMLElement) => {
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items.push(el);
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// insert in DOM order, not mount order, since conditionally rendered
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// items can register after already-registered items that appear later
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// in the DOM
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const index = items.findIndex(
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(item) => item.compareDocumentPosition(el) & Node.DOCUMENT_POSITION_PRECEDING
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);
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if (index === -1) {
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items.push(el);
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} else {
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items.splice(index, 0, el);
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}
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return () => {
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items = items.filter((item) => item !== el);
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};
···
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onMount(() => {
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const unregister = registerDropdown(group, close);
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const onDocumentClick = (event: MouseEvent) => {
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const onDocumentClick = (event: PointerEvent) => {
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if (open && event.target instanceof Node && root && !root.contains(event.target)) close();
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};
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const onKeydown = (event: KeyboardEvent) => {
···
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}
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};
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document.addEventListener("click", onDocumentClick);
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document.addEventListener("pointerdown", onDocumentClick);
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document.addEventListener("keydown", onKeydown);
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return () => {
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unregister();
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document.removeEventListener("click", onDocumentClick);
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document.removeEventListener("pointerdown", onDocumentClick);
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document.removeEventListener("keydown", onKeydown);
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};
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});
···
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{#if variant === "button"}
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<span bind:this={triggerWrapper} class="contents">
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<Button
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size="sm"
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class="px-3"
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onclick={toggle}
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onkeydown={onTriggerKeydown}