如何在Vue组件中使用依赖项?

myModal.vue 我需要使用 this cron-parser js lib app.js

import CronParser from 'cron-parser';

let interval = CronParser.parseExpression('*/2 * * * *');
console.log(interval.next().toString()); // logs a correct datetime

所以我现在想把这个cronParser传递给 文件。因此,在现有的海图注入之后,我添加了这4行中的第三行:

Vue.prototype.$eventHub = new Vue();
Vue.use(HighchartsVue);
Vue.use(CronParser);

let myModal = require('./components/myModal.vue');
// and some more components

let interval = CronParser.parseExpression('*/2 * * * *');
console.log(interval.next().toString());

"ReferenceError: CronParser is not defined"