Creating empty array in class of JavaScript giving syntax error

Question

I have two files in the same directory as 06classjs.js and 07 classObjects.js

06classjs.js

class User {
  constructor(name, email) {
    this.name = name;
    this.email = email;
  }
  courseList = [];

  getInfo() {
    return { name: this.name, email: this.email };
  }
  enrollCourse(name) {
    this.courseList.push(name);
  }
  getCourseList() {
    return this.courseList;
  }
}

module.exports = User;

07 classObjects.js

const User = require("./06classjs.js");

const dilip = new User("Dilip", "[email protected]");

console.log(dilip.getInfo());

dilip.enrollCourse("React");

When I am trying to run 07 classObjects.js using node it gives a syntax error for array declaration.

Error log

courseList = [];
             ^

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> (/media/dilip/4E622DC7622DB49D/Courses/LCO/JSTube/06 Advanceish/07 classObjects.js:3:14)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)

Can anyone help me with this?

Why isn't courseList = []; in your constructor as this.courseList: = [];? — Andy
– Andy, Commented Jun 25, 2021 at 17:31
Is that supposed to be a variable shared by all class instances? You need to write static courseList = []; — Barmar
– Barmar, Commented Jun 25, 2021 at 17:32
But you can't access static variables with this, it should be User.courseList. — Barmar
– Barmar, Commented Jun 25, 2021 at 17:33
Static class variables are only supported by newest browser versions. — Thallius
– Thallius, Commented Jun 25, 2021 at 17:41

CherryDT · Accepted Answer · 2021-06-25 17:46:11Z

1

You seem to be running an outdated version of node.js.

Support for public instance class fields was added in version 12.4.0.

answered Jun 25, 2021 at 17:46

CherryDT

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