javascript - Ember: Build Error Unexpected token -


i following tutorial try codes below

controller index.js

import ember 'ember';  export default ember.controller.extend({     emailaddress: '',      isvalid: ember.computed.match('emailaddress', /^.+@.+\..+$/),     isdisabled: ember.computed.not('isvalid')      actions: {         saveinvitation() {             alert(`saving of following email address in progress: ${this.get('emailaddress')}`);             this.set('responsemessage', `thank you! we've saved email address: ${this.get('emailaddress')}`);             this.set('emailaddress', '');         }     } });

index.hbs

<div class="jumbotron text-center">     <h1>coming soon</h1>      <br/><br/>      <p>don't miss our launch date, request invitation now.</p>      <div class="form-horizontal form-group form-group-lg row">         <div class="col-xs-10 col-xs-offset-1 col-sm-6 col-sm-offset-1 col-md-5 col-md-offset-2">             {{input type="email"  value=emailaddress class="form-control" placeholder="please type e-mail address." autofocus="autofocus"}}         </div>         <div class="col-xs-10 col-xs-offset-1 col-sm-offset-0 col-sm-4 col-md-3">             <button class="btn btn-primary btn-lg btn-block" disabled={{isdisabled}} {{action 'saveinvitation'}}>request invitation</button>         </div>      </div>     {{#if responsemessage}}     <div class="alert alert-success">{{responsemessage}}</div>     {{/if}}      <br/><br/> </div>

what expected if click on button, saveinvitation action called , shows alert box, sets responsemessage property, , deletes content of emailaddress.

however, got error this

build error  library-app/controllers/index.js (in /users/cy/desktop/ember/library-app/tmp/babel-input_base_path-omvwkqcg.tmp/0)  broccoli plugin: [babel] failed with: syntaxerror: library-app/controllers/index.js: unexpected token (9:1)     isdisabled: ember.computed.not('isvalid')      actions: {         saveinvitation() {             alert(`saving of following email address in progress: ${this.get('emailaddress')}`);             this.set('responsemessage', `thank you! we've saved email address: ${this.get('emailaddress')}`);


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