Events

Events live in form.events.code and are evaluated at runtime. Use ON to register handlers and SETVALUE/ALERT to interact with the form.

Quick example

Code
ON("change", "age", function (event) {
  if ($age >= 18) {
    SETVALUE("can_vote", "yes")
  }
})

Event builtins

Events

• ON
• OFF
• ALERT
• SETVALUE

Event handlers can also use the calculation builtins listed in Calculations & expressions.