blob() method in wixfetchresponse

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Hi I want to create a zip file from some selected images. I can’t find the blob() method for wix-fetch response module … I was referring to the example at www. medium .com @joshmarinacci/ a-little-fun-with-zip-files-4058812abf92 . I am assuming it is discontinued , could I get some help here. Thanks.

export async function saveToZip ( filename , urls ) {
const zip = new JSZip ()
const catalog = zip . folder ( ‘myfoldername’ )

**for** (  let  x  =  0  ;  x  <  urls . length ;  x ++){ 
//urls.forEach((url)=> { 
    let  url  =  'https://static.wixstatic.com/media/'  +  urls [ x ] 
        
    const  blobPromise  = **await**  fetch ( url ). then ( r  => {  return  r . blob()  }) // <====== Error line 
    catalog . file ( filename [ x ],  blobPromise ) 
} 

zip . generateAsync ({ type : "nodebuffer" }) 
    . then ( blob  =>  FileSaver . saveAs ( blob ,  "images" )) 
    . catch ( e  =>  console . log ( e ));

}