3.0 Beta 4

src/app/chat/elements/message-box/message-box.html

@@ -80,12 +80,12 @@
       </button>
     </div>
     <div class="items-middle">
-      <textarea (keydown.enter)="handleEnterKeydown($event); viewModel().onMessageSend(message.value, null)" [style]="'height:'+textareaHeight+'px;'" #message (input)="onTextAreaInput(message)" [(ngModel)]="viewModel().message"></textarea>
+      <textarea (keydown.enter)="viewModel().message.set(''); handleEnterKeydown($event); viewModel().onMessageSend(message.value, null)" [style]="'height:'+textareaHeight+'px;'" #message (input)="onTextAreaInput(message)" [(ngModel)]="viewModel().message"></textarea>
       <span class="placeholder"
             [class.hidden]="message.value != ''">{{ "chat.elements.messageBox.placeholder"|translate }}</span>
     </div>
     <div class="items-right">
-      <button [disabled]="message.value.trim() == ''" tuiButton appearance="flat" (click)="viewModel().onMessageSend(message.value, null)">
+      <button [disabled]="message.value.trim() == ''" tuiButton appearance="flat" (click)="viewModel().message.set(''); viewModel().onMessageSend(message.value, null)">
         <tui-icon icon="@tui.send"/>
       </button>
     </div>

src/app/chat/elements/message-box/message-box.ts

@@ -101,6 +101,7 @@ export class MessageBox {
 
   sendMessageWithCaption() {
     this.viewModel().onMessageSend(this.viewModel().message(), this.viewModel().files())
+    this.viewModel().message.set("")
     this.viewModel().files.set([])
     this.viewModel().dialogOpen.set(false)
   }