I have a HTML form for images and text-input. The data is send to the server with the content-type="multipart/form-data". Unfortunately the text-input data is not in charset=utf-8 and certain characters are later not displayed correctly. How can I provide utf8 in a multipart/form-data request?

    const formdata = new FormData()
    formdata.append("name", "The great 5-$-Offer!") 
    formdata.append("file", imageData)