引入插件就会出 Uncaught SyntaxError: Unexpected identifier

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只要

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import Contextmenu from "vue-contextmenujs"
Vue.use(Contextmenu);

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Uncaught SyntaxError: Unexpected identifier
at new Script (vm.js:79)
at createScript (vm.js:251)
at Object.runInThisContext (vm.js:303)
at Module._compile (internal/modules/cjs/loader.js:660)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:704)
at Module.load (internal/modules/cjs/loader.js:602)
at tryModuleLoad (internal/modules/cjs/loader.js:541)
at Function.Module._load (internal/modules/cjs/loader.js:533)
at Module.require (internal/modules/cjs/loader.js:640)
at require (internal/modules/cjs/helpers.js:20)