How to test criterion 7.4 “For each script that initiates a change of context, is the user warned or does the user have control?”

Test 1 (7.4.1)

1. Find all the JavaScript events in the document which initiate a change of context, for example
   • dynamic updating of form fields;
   • the opening of a new page when an option in a combobox is activated (<select> element);
   • AJAX updating of an essential part of the page;
   • automatic launch of a video player when a playlist is selected;
   • focus manipulation to change the user's current position on the page.
2. Check that
   • the user is warned by a message about the script action and the type of change before it is triggered;
   • or the change of context is initiated by an explicit button (input of the submit, button or image type or the button tag);
   • or the change of context is initiated by an explicit link.
3. If this is the case, the test is validated.