Custom SharePoint JavaScript field type

Question

I'm in the need to create a custom field type that renders like a LinkValue field. Instead of forwarding the browser to a different page, I would like to execute JavaScript code (in order to use OpenPopUpPage) depending on several parameters (maybe stored in SPFieldMultiColumnValue?).

What is the best way to approach the requirement?

Answer 1

This has to be the best reference on custom field types from Bjorn Furuknap

Customizing the User Experience of SharePoint: Custom fields deep dive

There is some pain involved in custom fields types though, in his own words

“Looking back I think it would have been easier, and less painful, to eat my own eyes.”