javascript - Uncaught SyntaxError: Unexpected token import in "backbone.radio.js" -

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i'm trying migrate application backbone marionette (v3), got stuck in point 2 days already.

when try run app in browser, error shows in console (and screen blank):

uncaught syntaxerror: unexpected token import in backbone.radio.js:1

first line in backbone.radio.js import statement underscore:

import _ 'underscore';

i use requirejs module loader. configuration in main.js:

require.config({   paths: {     jquery: '../bower_components/jquery/dist/jquery',     underscore: '../bower_components/underscore/underscore',     backbone: '../bower_components/backbone/backbone',     'backbone.radio': '../bower_components/backbone.radio/build/backbone.radio',     'backbone.babysitter': '../bower_components/backbone.babysitter/src/build/backbone.babysitter',     marionette: '../bower_components/marionette/lib/backbone.marionette',     bootstrap: '../bower_components/bootstrap/dist/js/bootstrap',     text: '../bower_components/requirejs-plugins/lib/text'   },   map: {     '*': {       'backbone.wreqr': 'backbone.radio'     }   },   shim: {     jquery: {       exports: '$'     },     underscore: {       exports: '_'     },     backbone: {       deps: [ 'underscore', 'jquery' ],       exports: 'backbone'     },     marionette: {       deps: [ 'jquery', 'underscore', 'backbone' ],       exports: 'marionette'     },     bootstrap: {       deps: [ 'jquery' ]     }   } })  require(['appinstance'], function (app) {   app.start() })

this appinstance.js:

define(function (require) {   var app = require('app')   return new app() })

and app.js file:

define(function (require) {   var $ = require('jquery')   var _ = require('underscore')   var backbone = require('backbone')   var router = require('router')   var controller = require('controller')   var marionette = require('marionette')   var commonheaderview = require('views/common/header')    return marionette.application.extend({     /**      * define regions application.      *      * @returns {object}      */     regions: function () {       return {         header: '#header'       }     },     /**      *      * @param {object} options      */     start: function (options) {       var commonheaderview = new commonheaderview()        marionette.application.prototype.start.apply(this, [options])        this.header.show(commonheaderview)        this.router = new router({ controller: new controller() })        backbone.history.start()     }   }) })

does know why i'm having problem?

unfortunately ran out of ideas on how solve this, appreciated.

p.s.: use marionette v3.0.0, backbone v1.2.3 , requirejs v2.1.15

that complains import-statement indication referencing source file. make sure backbone.radio-path goes build file.


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