formAdjusts

formAdjusts is a lightweight, client-side mechanism for modifying the behavior and appearance of HTML forms in response to user input or external data. It provides a declarative approach to specify how form fields should change when certain conditions are met, enabling dynamic forms without scattered ad hoc scripting.

A formAdjusts setup consists of rules that connect a target field or set of fields to conditions and actions. A rule typically identifies the target by name or selector, defines a condition (for example, another field has a certain value), and lists one or more actions to perform when the condition holds. This structure supports cascading dependencies and multiple rules operating on the same form.

Common targets include visibility, enabled state, required status, value or attributes, and CSS classes. Actions can show or hide fields, enable or disable inputs, set or reset values, toggle required attributes, adjust min/max constraints, or apply styling changes. Rules may be triggered by events such as input, change, or custom signals, and can be grouped into rule sets for reuse.

In practice, formAdjusts is used to create conditional fields, live calculations, progressive disclosure, or dynamic validation rules. It is typically framework-agnostic and can work with vanilla JavaScript or integrate with libraries like React or Vue by interfacing with the form’s state or DOM.

Considerations include performance on large forms, maintainability of complex rule networks, and accessibility implications, such as ensuring that hidden fields are not just visually removed but also excluded from navigation and validation. See also dynamic forms, conditional logic, and form validation.