UXP - Batch export Webp

@Stephen Marsh @Ciccillotto Here is the fully working code. You need to have an opened photoshop doc with few artboards in it. The script will prompt you to pick a export destination and then will export each artboard as a webp.

const { app, core } = require("photoshop");
const uxp = require("uxp");
const batchPlay = require("photoshop").action.batchPlay;
const {localFileSystem: fs} = require("uxp").storage;

const {executeAsModal} = require("photoshop").core;

const doc = app.activeDocument;
exportArtboardsAsWEBP();

async function exportArtboardsAsWEBP() {


const  destinationFolder = await uxp.storage.localFileSystem.getFolder();
await core.executeAsModal(async () => {
for (let i = 0; i < doc.artboards.length; i++) {
    const artboard = doc.artboards[i];
    await selectArtboard(artboard.name)
    await duplicateArtboard(artboard.name);
    console.log(doc.name);
    await exportWEBP(destinationFolder, artboard.name);
    app.activeDocument.closeWithoutSaving();
    // // await app.activeDocument.closeWithoutSaving();
    app.activeDocument = doc;

    }
})

}


// exportWEBP takes FOLDER and STRING as parameters!!!
async function exportWEBP(destinationFolder, fileName) {
    let activeDocumentID = app.activeDocument.id;
    console.log(activeDocumentID);
    let newFile = await destinationFolder.createFile(fileName, { overwrite: true });
    let saveWebpFile = await fs.createSessionToken(newFile);
    await core.executeAsModal(async () => {
        const result = await batchPlay(
            [
               {
                  _obj: "save",
                  as: {
                     _obj: "WebPFormat",
                     compression: {
                        _enum: "WebPCompression",
                        _value: "compressionLossless"
                     },
                     includeXMPData: false,
                     includeEXIFData: false,
                     includePsExtras: false
                  },
                  in: {
                     _path: saveWebpFile,
                     _kind: "local"
                  },
                  // fileDoNotAppendCopy: true,
                  documentID: 999,
                  copy: true,
                  lowerCase: true,
                  saveStage: {
                     _enum: "saveStageType",
                     _value: "saveBegin"
                  },
                  _options: {
                     dialogOptions: "dontDisplay"
                  }
               }
            ],
            {}
         );
    }, );
 }


 async function duplicateArtboard(artboardName) {
    console.log(artboardName);
    const result = await batchPlay(
       [
          {
             _obj: "make",
             _target: [
                {
                   _ref: "document",
                }
             ],
             name: artboardName,
             using: {
                _ref: "layer",
                _enum: "ordinal",
                _value: "targetEnum"
             },
             version: 5,
             _options: {
                dialogOptions: "dontDisplay"
             }
          }
       ],
       {}
    );

}


  async function selectArtboard(artboardName) {
   await core.executeAsModal(async () => {
    //   app.activeDocument = app.activeDocument; 
       await batchPlay(
           [
               {
                   _obj: "select",
                   _target: [
                       {
                           _ref: "layer",
                           _name: artboardName,
                       },
                   ],
                   makeVisible: false,
               },
           ],
           {
               synchronousExecution: false,
               modalBehavior: "execute",
           }
       );

      //  console.log("Selected Artboard:", artboardName);
   }); 
}

I tried your script for webp and it doesn't copy,
it seems ok.

Stephen
this must be like this, it's correct
// fileDoNotAppendCopy: true,

Also where does the following come from?
nativePath

this is a piece of code missing that is at the beginning and tells where to save the file
S_Stoianov did not insert it.

@S_Stoianov 

I have only been met with frustration and sorrow when it comes to UXP scripting when wishing to save files as simply as is possible using ExtendScript.

I'm not in front of a computer, however, why did you comment out this line?

 // fileDoNotAppendCopy: true,

Also where does the following come from?

nativePath