fix: do not break single "improved" links from edge

Author: imjohnbo

src/paste-markdown-html.ts

@@ -12,7 +12,11 @@ type MarkdownTransformer = (element: HTMLElement | HTMLAnchorElement, args: stri
 
 function onPaste(event: ClipboardEvent) {
   const transfer = event.clipboardData
-  if (!transfer || !hasHTML(transfer)) return
+  // if there is no clipboard data, or
+  // if there is no html content in the clipboard, or
+  // if the browser has made an "improved URL for pasting", return
+  // See https://support.microsoft.com/en-gb/microsoft-edge/improved-copy-and-paste-of-urls-in-microsoft-edge-d3bd3956-603a-0033-1fbc-9588a30645b4 for more
+  if (!transfer || !hasHTML(transfer) || hasLinkPreview(transfer)) return
 
   const field = event.currentTarget
   if (!(field instanceof HTMLTextAreaElement)) return
@@ -79,6 +83,10 @@ function hasHTML(transfer: DataTransfer): boolean {
   return transfer.types.includes('text/html')
 }
 
+function hasLinkPreview(transfer) {
+  return transfer.types.includes('text/link-preview');
+}
+
 function linkify(element: HTMLAnchorElement): string {
   return `[${element.textContent}](${element.href})`
 }