Show custom popup and prevent page from refreshing / exiting if form changes and the user did not save his work
33377
How can I override the OnBeforeUnload dialog and replace it with my own?
125280
How to implement "Add another item" for custom forms?
113150
Is there an event for when a Chrome Extension popup is closed?
150040
Can a form tell if there are any modal windows open?
82012
Why are HTML forms sometimes cleared when clicking on the browser back button
124485
How to remember previously saved form data for subsequent requests
142394
How do I prevent a form object from disposing on close?
2416
Stay on current page, when form validation is false
121718
How to trigger Ajax forms machinery
111841
How to prevent form from being submitted?
18733
Custom validation for a form?
154478
Post a Form to Popup window not to the parent
14637
Submit form without page reloading
122826
Display custom pop over on standard field in lightning
34109
Detect changes in the DOM
19518
Custom form submit handler is called, but node is not saved
134091
Show error in new HTML element without page refresh