Added transformCopiedHTML callback

src/clipboard.ts

@@ -36,6 +36,9 @@ export function serializeForClipboard(view: EditorView, slice: Slice) {
   let text = view.someProp("clipboardTextSerializer", f => f(slice, view)) ||
       slice.content.textBetween(0, slice.content.size, "\n\n")
 
+  // Call transformCopiedHTML callback to allow user to manipulate the HTML content before passing to clipboard
+  wrap = view.someProp("transformCopiedHTML", f => f(wrap!, view)) || wrap
+
   return {dom: wrap, text}
 }
 

src/index.ts

@@ -673,6 +673,10 @@ export interface EditorProps<P = any> {
   /// for example to clean it up.
   transformPastedHTML?: (this: P, html: string, view: EditorView) => string
 
+  /// Can be used to transform copied HTML, _before_ it is,
+  /// passed to the clipboard.
+  transformCopiedHTML?: (this: P, html: HTMLDivElement, view: EditorView) => HTMLDivElement
+
   /// The [parser](#model.DOMParser) to use when reading content from
   /// the clipboard. When not given, the value of the
   /// [`domParser`](#view.EditorProps.domParser) prop is used.

test/webtest-clipboard.ts

@@ -69,6 +69,16 @@ describe("Clipboard interface", () => {
         new Slice(p("abc").content, 0, 0), eq)
   })
 
+  it("will call transformCopiedHTML", () => {
+    let d = doc(blockquote(blockquote(p("foo"))))
+    let view = tempEditor({doc: d, transformCopiedHTML(html) {
+        html.innerHTML = '<p>bar</p>'
+        return html
+    },})
+    let {dom} = serializeForClipboard(view,new Slice(doc(p("foo")).content, 1, 0), eq)
+    ist(dom.innerHTML, '<p>bar</p>')
+  })
+
   it("will call transformPastedText", () => {
     let view = tempEditor({transformPastedText(_) { return "abc" }})
     ist(parseFromClipboard(view, "def", null, false, view.state.doc.resolve(1)),