This is an important message requiring you to make a choice if you're based in the EU.
AngularJs Blocks Form Submit without "action"-In general, AngularJs blocks the form submit, because of empty "Action".
Use PHP empty () function, or count() function to check whether the array is empty or not. See examples.
There are two ways to count items in a filtered AngularJs list used in ngRepeat: to get filter count either in template or in controller. See how to do it.
Learn How to use Angularjs filters. AngularJs lets us create custom filters and use it like you use other filters. Try examples yourself and see the result.