add setDefaultNodeAttributes

docs/src/demos/Extensions/TextAlign/index.vue

@@ -9,6 +9,9 @@
     <button @click="editor.chain().focus().textAlign('right').run()">
       right
     </button>
+    <button @click="editor.chain().focus().setDefaultNodeAttributes(['textAlign']).run()">
+      reset
+    </button>
     <editor-content :editor="editor" />
   </div>
 </template>

packages/core/src/extensions/index.ts

@@ -11,6 +11,7 @@ export { RemoveMarks } from './removeMarks'
 export { ScrollIntoView } from './scrollIntoView'
 export { SelectAll } from './selectAll'
 export { SelectParentNode } from './selectParentNode'
+export { SetDefaultNodeAttributes } from './setDefaultNodeAttributes'
 export { SetNodeAttributes } from './setNodeAttributes'
 export { SetBlockType } from './setBlockType'
 export { SetContent } from './setContent'

packages/core/src/extensions/setDefaultNodeAttributes.ts

@@ -0,0 +1,36 @@
+import { Command } from '../Editor'
+import { createExtension } from '../Extension'
+
+export const SetDefaultNodeAttributes = createExtension({
+  addCommands() {
+    return {
+      setDefaultNodeAttributes: (attributeNames: string[] = []): Command => ({ tr, state }) => {
+        const { selection } = tr
+        const { from, to } = selection
+
+        state.doc.nodesBetween(from, to, (node, pos) => {
+          if (!node.type.isText) {
+            attributeNames.forEach(name => {
+              const attribute = node.type.spec.attrs?.[name]
+              const defaultValue = attribute?.default
+
+              if (attribute && defaultValue !== undefined) {
+                tr.setNodeMarkup(pos, undefined, {
+                  [name]: defaultValue,
+                })
+              }
+            })
+          }
+        })
+
+        return true
+      },
+    }
+  },
+})
+
+declare module '../Editor' {
+  interface AllExtensions {
+    SetDefaultNodeAttributes: typeof SetDefaultNodeAttributes,
+  }
+}