Check if multiple elements with same class exist
4521
Is there an "exists" function for jQuery?
150418
jquery does div contain children of a certain class
22996
In Java, is it possible to know whether a class has already been loaded?
110541
How to check whether dynamically attached event listener exists or not?
6288
How do I check if an object has a specific property in JavaScript?
104905
Check if XML Element exists
101850
How to add class to a jQuery element if a condition is true and remove the same class if the condition is false?
11663
Checking a list if a certain string exist in visualforce page
121066
How to check if list item already exist when adding it with
66211
Removing elements that have consecutive duplicates
105864
How to check if element has any children in Javascript?
76360
Disable duplicate check for apex class?
444
jQuery - find last class on the element
144136
jQuery: Check if image exists
102897
check multiple values exists php array
80317
JavaScript and getElementById for multiple elements with the same ID
72102
How to check if a class inherits another class without instantiating it?