add clearContent command

packages/tiptap-core/src/Editor.ts

@@ -54,6 +54,7 @@ export class Editor extends EventEmitter {
     this.registerCommand('insertText', require('./commands/insertText').default)
     this.registerCommand('insertHTML', require('./commands/insertHTML').default)
     this.registerCommand('setContent', require('./commands/setContent').default)
+    this.registerCommand('clearContent', require('./commands/clearContent').default)
     
     if (this.options.injectCSS) {
       injectCSS(require('./style.css'))
@@ -84,7 +85,7 @@ export class Editor extends EventEmitter {
     }
     
     this.commands[name] = this.chainCommand((...args: any) => {
-      return new Promise(resolve => callback(resolve, this, ...args))
+      return new Promise(resolve => callback(resolve, this.proxy, ...args))
     })
 
     return this.proxy

packages/tiptap-core/src/commands/clearContent.ts

@@ -0,0 +1,13 @@
+import { Editor } from '../Editor'
+import { TextSelection } from 'prosemirror-state'
+
+declare module '../Editor' {
+  interface Editor {
+    clearContent(emitUpdate?: Boolean): Editor,
+  }
+}
+
+export default function clearContent(next: Function, editor: Editor, emitUpdate = false): void {
+  editor.setContent('', emitUpdate)
+  next()
+}

packages/tiptap-core/src/commands/setContent.ts

@@ -3,7 +3,7 @@ import { TextSelection } from 'prosemirror-state'
 
 declare module '../Editor' {
   interface Editor {
-    setContent(content: string, emitUpdate: Boolean, parseOptions: any): Editor,
+    setContent(content: string, emitUpdate?: Boolean, parseOptions?: any): Editor,
   }
 }
 
@@ -11,7 +11,7 @@ export default function setContent(
   next: Function,
   editor: Editor,
   content = null,
-  emitUpdate = true,
+  emitUpdate = false,
   parseOptions = {},
 ): void {
   if (content === null) {