Not able to minify JavaScript with arrow function

[rexxon-chuah]

Installed product versions

• Visual Studio: Community 2019
• This extension: 2.8.396

Description

Add a JavaScript with the following content:

class Person {
    function1 = () => {
        console.log("Hello, I am function1");
    }
}

BunderMinifier failed to minify the above code snippet. However, the minify works when the function1is rewritten in normal function syntax.

Steps to recreate

1. Simply minify the above code snippet.

Current behavior

Two errors shown in Error List window.

(Bundler & Minifier) Expected '{': => (Bundler & Minifier) Expected '}'

Expected behavior

BundlerMinifier should be able to minify the arrow function.

[jtsom]

I just ran into this, but the error window had a very unhelpful Error:0 Stack Empty error.

[TheoVC]

I don't think your syntax is correct... variables should not be declared in class scope (yet) it should be...

class Person {
   constructor(){
     this.function1 = () => {
        console.log("Hello, I am function1");
    }
  }
}

[TheoVC]

or even better

class Person {
   function1(){
        console.log("Hello, I am function1");
    }
}

[GitHubStan]

I have this code that is being minified: const facilityId = vm.selectedFacility.FacilityId; const facilityData = deviceSettingForFacilities[facilityId].value; const record = facilityData.find((({ DeviceId }) => DeviceId === deviceId));

This is the minified code: const r=u.selectedFacility.FacilityId,f=e[r].value,o=f.find({DeviceId:n}=>n===i);

That produces this JavaScript error in Chrome: Uncaught SyntaxError: Malformed arrow function parameter list

In the minified code, adding in the parenthesis around {DeviceId:n}, like this ({DeviceId:n}), makes the error go away. Is there a work-around for this?

[TheoVC]

maybe ommiting the deconstruction..

const record = facilityData.find(((obj) => obj.DeviceId === deviceId));

or update the bundler minifier to last version, you have to update de extension manually. I don't know why the author do not upload new version to marketplace. http://vsixgallery.com/extension/a0ae318b-4f07-4f71-93cb-f21d3f03c6d3/,

[jtsom]

I have the version shown on that page - 3.2.447 - and get the "Error 0" error (if "source map" is enabled on a file), but it's a NuGet package, not an extension.