javascript - How to phrase 'has not' in jquery? -

for page in our app there number of customers generated in list when page loaded. 1 scrolls down on page more customers generated towards bottom of list, , forth till 1 scrolls way down , there no more customers generate.

i trying check, within .on() function, if new generated customers @ bottom has clock icon, , if not add clock icon new customers. check:

    var isclock = $(timepickers).parent().has('.clockicon').length ? '' : addclock;     if (typeof isclock === 'function') {         isclock();     } 

the problem customers there start on page, of course have clock icon, because of customers have clock icon not adding of ones don't have 1 now. .has() makes more since, idea of .is() because of says on jquery website:

check current matched set of elements against selector, element, or jquery object , return true if @ least 1 of these elements matches given arguments.

and thats needed check if of customers don't have clock icon add it. cannot think of way use .is() instead thinking use .not() or not: see if of customers don't have clock icon run function. not sure how 'if not have something' not 'if not something'. know how this????

use not() instead of has()