Uncaught ReferenceError: must call super constructor before using 'this' in derived class constructor

[skjbulcher]

I've installed shepherd.js as a node module using npm (version 10.0.1), and I'm getting this message when attempting to create a tour:

Uncaught ReferenceError: must call super constructor before using 'this' in derived class constructor

---

My code is the following:

import Shepherd from 'shepherd.js';

        this.tour = new Shepherd.Tour({
            useModalOverlay: false,
            defaultStepOptions: {
                classes: 'shadow-md bg-purple-dark',
                scrollTo: {behavior: 'smooth', block: 'center'},
            },
        });

---

The debugger points to this line of code:

class Tour extends Evented {
          /** ... **/
	  constructor(options) {
	    var this$1 = this;   // <----  This is where the exception is raised

	    if (options === void 0) {
	      options = {};
	    }

	    super(options);    // <--- complains this should have already been called?

---

When I download and included the file from the releases page manually in my app, it doesn't raise the exception. I'm a little confused as to why it works that way but not when I use the version from npm?

[RobbieTheWagner]

@skjbulcher can you try version 11? I'm not sure if it will make a difference or not. Are you using a framework?

[skjbulcher]

I'm not at a point where I can make changes, sorry

[RobbieTheWagner]

Without any info about if you are using a framework or not, or how you have things setup, I cannot help.

[skjbulcher]

Well, the error refers to the line I have pointed out in the code above. super is called after referencing this, which is not allowed in a derived class constructor. All of the information that led to the error is contained in the code snippet above.

I don't know why it worked when I downloaded the file from the releases page manually (is it different than the npm version?), but the error is based on hard JavaScript rules governing inheritance.

Sorry that I don't have time to go back and forth on this issue. I have a whole lot piled on me right now, and I've moved on from this project since I filed the report. I'm surprised no one else has commented on this issue.