Conditional Logic

Conditional logic lets a form react to respondent input.

What Conditional Logic Can Do

Rules can:

Show or hide fields
Enable or disable fields
Mark fields required or optional
Set values
Filter selectable options
Mirror values from another field
Apply validation effects

Open the Dependency Builder

Open a form.
Open the dependencies or conditional logic area.
Create or select a rule.

Rule Structure

A rule has:

One or more predicates, also called conditions
One or more effects, also called actions
Logic for how conditions combine

Conditions can be grouped with AND/OR behavior.

Conditions

Conditions compare field values. Examples include:

Equals
Does not equal
Contains
Greater than
Less than
Between
Date before
Array contains
Email valid

Effects

Effects update the form state. Examples include:

Show field
Hide field
Set required
Set optional
Disable field
Enable field
Set value
Filter enum/options

Nested Fields

Rules support nested field paths such as fields inside repeating groups.

Validation

The dependency system validates rule structure and detects circular dependencies. If a rule cannot be saved or does not run as expected, check:

The source field exists
The target field exists
The predicate value matches the field type
Rules do not reference each other in a loop

Public Runtime

Published forms pass dependency data into the renderer. Respondents see the effects of conditional rules while completing the form.