我在单独的 JavaScript 文件中创建了一个类,并将其导入到另一个文件中。但是,我在导出的类中遇到语法错误。该类在未导出时不会显示任何错误。在Property.js(导出的类)中class Property{ //constants declarations YEAR_AMOUNT = 10; PERIOD_AMOUNT = 120; //Properties closingCosts; initialInvestment; //arrays declarations //income adjustedRent= new Array(); adjustedOtherRevenue = new Array(); grossRevenue= new Array(); effectiveRevenue= new Array();constructor(title, address, askPrice, muniLandEval, muniBuildEval, notes){ this.title=title; this.address=address; this.askPrice=askPrice; this.muniLandVal = muniLandEval; this.muniBuildVal = muniBuildEval; this.notes=notes}//other methods}export default class Property在propertyManager.js中(导入)//handle property (calculations, creation, save)const express = require('express');const router = express.Router();const Property = require('./Property.js');router.post('/', (req, res) => { //create a Property const property = new Property(req.body.title, req.body.address, req.body.askPrice, req.body.muniLandVal, req.body.muniBuildVal, req.body.notes );})module.exports = router;有问题的错误D:\ImmoTuul\RE_Analysis_\RE_MVP\server\routes\api\Property.js:4 YEAR_AMOUNT = 10; ^SyntaxError: Unexpected token = at Module._compile (internal/modules/cjs/loader.js:723:23) at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10) at Module.load (internal/modules/cjs/loader.js:653:32) at tryModuleLoad (internal/modules/cjs/loader.js:593:12) at Function.Module._load (internal/modules/cjs/loader.js:585:3) at Module.require (internal/modules/cjs/loader.js:692:17) at require (internal/modules/cjs/helpers.js:25:18) at Object.<anonymous> (D:\ImmoTuul\RE_Analysis_\RE_MVP\server\routes\api\propertyManager.js:4:18) at Module._compile (internal/modules/cjs/loader.js:778:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)我希望能够在propertyManager文件中使用该类及其构造函数。
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