transform is not being called when parsing a file

Question

I am using papaparse and I would like to transform my values as they are being parsed. I have added a transform function but it never gets called.

What am I doing wrong?

Papa.parse(file, {
    complete: ({data, errors, meta}) => {
        alert('I get called')
    },
    transform : (val, col)=>{
        alert('i dont get called')
    }
});

Answer 1

Updated from 4.4 to 4.6 and now it works.