fix(backspace): empty tags before the caret cannot be removed

src/plugins/backspace-key.ts

@@ -133,6 +133,12 @@ export default (editor: Editor) => {
       editor.history.save();
       return;
     }
+    if ((prevNode.isMark || prevNode.name === 'a') && prevNode.isEmpty) {
+      event.preventDefault();
+      prevNode.remove();
+      editor.history.save();
+      return;
+    }
     if (prevNode.isText && prevNode.text().length === 1 && prevNode.parent().isBlock) {
       event.preventDefault();
       const block = prevNode.closestBlock();

tests/plugins/backspace-key.test.ts

@@ -307,7 +307,7 @@ describe('plugins / backspace-key', () => {
     );
   });
 
-  it('should remove emtpy mark', () => {
+  it('should remove empty mark (1)', () => {
     const content = `
     <h1>foo</h1>
     <p><code><focus /><br /></code></p>
@@ -324,7 +324,23 @@ describe('plugins / backspace-key', () => {
     );
   });
 
-  it('should remove emtpy link', () => {
+  it('should remove empty mark (2)', () => {
+    const content = `
+    <p><strong></strong><focus /><br /></p>
+    `;
+    const output = `
+    <p><focus /><br /></p>
+    `;
+    testPlugin(
+      content,
+      output,
+      editor => {
+        editor.keystroke.keydown('backspace');
+      },
+    );
+  });
+
+  it('should remove empty link (1)', () => {
     const content = `
     <h1>foo</h1>
     <p><a href="bar"><focus /><br /></a></p>
@@ -341,6 +357,22 @@ describe('plugins / backspace-key', () => {
     );
   });
 
+  it('should remove empty link (2)', () => {
+    const content = `
+    <p><a href="#"></a><focus /><br /></p>
+    `;
+    const output = `
+    <p><focus /><br /></p>
+    `;
+    testPlugin(
+      content,
+      output,
+      editor => {
+        editor.keystroke.keydown('backspace');
+      },
+    );
+  });
+
   it('should merge heading into paragraph', () => {
     const content = `
     <p>foo</p>