Example: AJAX Graceful Degradation

These examples show AJAX with graceful degradation when JavaScript is not available.

In each of these the key idea is that the form is rebuilt different ways depending on form input. In order to accomplish that, the form builder function is in charge of almost all logic.

Parent topics

File

modules/examples/ajax_example/ajax_example_graceful_degradation.inc, line 7

Demonstrations of AJAX with graceful degradation.

Functions

Name	Location	Description
ajax_example_add_more	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Form with 'add more' and 'remove' buttons.
ajax_example_add_more_add_one	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Submit handler for the "add-one-more" button.
ajax_example_add_more_callback	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Callback for both ajax-enabled buttons.
ajax_example_add_more_remove_one	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Submit handler for the "remove one" button.
ajax_example_add_more_submit	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Final submit handler.
ajax_example_dependent_dropdown_degrades	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Dropdown form based on previous choices.
ajax_example_dependent_dropdown_degrades_first_callback	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Selects just the second dropdown to be returned for re-rendering.
ajax_example_dependent_dropdown_degrades_submit	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Submit function for ajax_example_dependent_dropdown_degrades().
ajax_example_dynamic_sections	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Dynamically-enabled form with graceful no-JavaScript degradation.
ajax_example_dynamic_sections_select_callback	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Callback for the select element.
ajax_example_dynamic_sections_submit	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Submit function for ajax_example_dynamic_sections().
ajax_example_dynamic_sections_validate	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Validation function for ajax_example_dynamic_sections().
ajax_example_wizard	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Wizard form.
ajax_example_wizard_callback	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Wizard callback function.
ajax_example_wizard_submit	modules/examples/ajax_example/ajax_example_graceful_degradation.inc	Submit function for ajax_example_wizard.