Download File programmatically on website / JS/TS

ts

const download = async () => {
			const fetchResult = await fetch("http://mywebsite.com/download")
			if(fetchResult.status === 200){
            const blob = await fetchResult.blob();
            var url = window.URL.createObjectURL(blob)
            var a = document.createElement("a")
            a.href = url
            a.download = `DownloadFilename.csv`
            document.body.appendChild(a) // we need to append the element to the dom -> otherwise it will not work in firefox
            a.click()
            a.remove() //afterwards we remove the element again
      }
      else{
          const json = await fetchResult.json();
          alert(json.message)
      }
	}