Function gloo_file::callbacks::read_as_text

pub fn read_as_text<F>(blob: &Blob, callback: F) -> FileReaderwhere
    F: FnOnce(Result<String, FileReadError>) + 'static,

Asynchronously converts blob into a text string and then passes it to the callback.

If the returned FileReader is dropped before the callback is called, the read will be cancelled.