Questions re: pdf.js API capabilities

[KieranP]

I can't find any documentation that specifies all API actions available. I'm looking for a way to do the following:

1. Replace placeholder text with values. A PDF might contain [[full_name]] and I need to replace that with the name of the user viewing the document, e.g. page.content = page.content.replace('[[full_name]]', 'Kieran P')

2. Return field name/value combos for all fields in the PDF. If a PDF had a field for DOB, with a field name of "dob", being able to call something like pdf.fields() and get back { 'dob': '2020-01-01' } would be useful

3. Be able to fill in PDF form fields programmatically, Using DOB field from above, being able to do something like this: pdf.field('dob').value = '2020-01-01'

With these three things, users would be able to view PDFs that are dynamically tailored to them (their name inserted), fill in all fields which can then be programmatically fetched and saved in a DB when the user clicks a "Submit" button outside the PDF, and then later return to that PDF and see their previously entered data in the appropriate fields.

We currently use a commercial solution to achieve this, but it costs us a whopping $20k USD per year. Is PDF.js capable of doing these things? If not, is there any roadmap to support such things? And if not, does anyone know of any free or cheaper solution to achieve what we're doing?

Thanks :-)