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SyntaxError:尝试导出es5模块中的类以在另一个模块中使用时出现意外标记{

ecmascript-5 javascript

0

bobbyrne01 · 技术社区 · 7 年前

你知道错误是怎么发生的吗?该类看起来被声明为ok。。

汽车.js

function Car() {}

Car.prototype.setNumberOfWheels(numberOfWheels) {
    this.numberOfWheels = numberOfWheels;
}

Car.prototype.print() {
    console.log(this);
}

module.exports.Car = Car;

服务器.js

const model = require('./model.js');

Car.prototype.setNumberOfWheels(numberOfWheels) {
                                                ^

SyntaxError: Unexpected token {
    at createScript (vm.js:80:10)
    at Object.runInThisContext (vm.js:139:10)
    at Module._compile (module.js:617:28)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/Users/bob/git/project/server.js:2:15)

3 回复 | 直到 7 年前

1

4

omri_saadon 7 年前

你应该申报 setNumberOfWheels print 作为一个函数。

Car.prototype.setNumberOfWheels = function(numberOfWheels) {
    this.numberOfWheels = numberOfWheels;
}

Car.prototype.print = function() {
    console.log(this);
}

2

1

Nelson Owalo 7 年前

使用 shorthand syntax

var car = {}

然后添加方法,

Car.prototype.setNumberOfWheels = numberOfWheels => {
    this.numberOfWheels = numberOfWheels;
}

Car.prototype.print = () => {
    console.log(this);
}

3

1

Vladu Ionut 7 年前

在Ecmascript-5中,必须定义和打印 see prototype examples )

function Car() {}

Car.prototype.setNumberOfWheels = function(numberOfWheels) {
    this.numberOfWheels = numberOfWheels;
}

Car.prototype.print= function() {
    console.log(this);
}

module.exports.Car = Car;

ES6 Classes

class Car {
    setNumberOfWheels(numberOfWheels) {
        this.numberOfWheels = numberOfWheels;
    }
    print() {
        console.log(this);
    }
}


module.exports.Car = Car;