#434

frontend/src/components/common/HelpPopover.tsx

@@ -0,0 +1,35 @@
+import { useId, useRef } from 'react'
+import { CircleHelp } from 'lucide-react'
+
+import type { ReactNode } from 'react'
+
+
+const HelpPopover = ({ label, children }: {
+    label: { text: string; language: string }; children: ReactNode },
+) => {
+  const id = useId ()
+  const trigger = useRef<HTMLButtonElement> (null)
+  const panel = useRef<HTMLDivElement> (null)
+  return <>
+    <button ref={trigger} type="button" popoverTarget={id} aria-label={label.text}
+        lang={label.language} className="inline-flex align-middle"
+        onClick={() => {
+          const rect = trigger.current?.getBoundingClientRect ()
+          if (panel.current != null && rect != null)
+          {
+            panel.current.style.top = `${rect.bottom + 4}px`
+            panel.current.style.left = `${Math.min (rect.left, window.innerWidth - 288)}px`
+          }
+        }}><CircleHelp size={14}/></button>
+    <div ref={panel} id={id} popover="auto" tabIndex={-1}
+        role="dialog" aria-label={label.text} lang={label.language}
+        onToggle={event => {
+          if (event.newState === 'open') panel.current?.focus ()
+        }} className="fixed m-0 w-72 max-w-[90vw] rounded border bg-white p-3
+        text-sm text-slate-900 shadow-lg dark:border-slate-600 dark:bg-slate-900
+        dark:text-slate-100">{children}</div>
+  </>
+}
+
+
+export default HelpPopover