cio_react_mobile_component.js

 <button
    css={buttonStyle(downloading, true)}
    disabled={downloading}
    onClick={async () => {
      trackDownloadAppClick('mobile')
      setDownloading(true)
      setMessage('')
      const response = await fetch(`${url}/api/download/mobile?email=${emailValue}`)
      if (!response.ok) {
        const body = await response.json()
        setMessage(`Error sending email: ${body.error}`)
      } else {
        setMessage(`Email sent to ${emailValue}`)
      }
      setDownloading(false)
    }}
>