Error submitting my first add on

[better_options_online]

I am getting this error which I can not understand.

I am getting syntax error and all I have in that js/core.js line 62 column 13 which is
//Image
let image = document.createElement(“img”);
image.classList.add(“a-dynamic-image”);
image.src = this.ImageUrl; <-- This is the point of error

Can someone tell me how to resolve this?

Thanks

[better_options_online]

Error is pointed to this line
class AmazonItem{

ImageUrl;       ---------- this line --------

ProductUrl;

[juraj.masiar]

Probably same issue as here:

Using es6 import on Extension Pages

The linter does not yet support class fields, which is what the syntax you have there likely is.

Also to paste code here, place ``` on the line before and after the code to enable syntax highlight.

Regarding possible solutions here:

1. use Babel to transpile your code to older version
2. use TypeScript which can also generate older code but supports many new features not yet available in javascript
3. fix the linter? Probably not an easy task
4. don’t use public fields yet. Just keep the initialization in the constructor without explicit declaration in the class body.