fix: Work around issue where numeric value is passed to prosemirror-m…

…arkdown

Signed-off-by: Julius Härtl <[email protected]>

cypress/e2e/nodes/ImageView.spec.js

@@ -85,7 +85,7 @@ describe('Image View', () => {
 				.should('contain', `/dav/files/${user.userId}/github.png`)
 		})
 
-		it('with preview', () => {
+		it.only('with preview', () => {
 			cy.get('.files-fileList tr[data-file="github.png"]')
 				.should('have.attr', 'data-id')
 				.then(imageId => {

src/nodes/Image.js

@@ -96,6 +96,7 @@ const Image = TiptapImage.extend({
 
 	/* Serializes an image node as a block image, so it ensures an image is always a block by itself */
 	toMarkdown(state, node, parent, index) {
+		node.attrs.alt = node.attrs.alt.toString()
 		defaultMarkdownSerializer.nodes.image(state, node, parent, index)
 		state.closeBlock(node)
 	},