How to implement this example in jquery?

Question

JavaScript

it is necessary that the function is executed only when there is an indent from above 100px, for example
if(top>100){function(){
....}}

Answer 1

if($('html').scrollTop() > 100){
myfunction()
}

Answer 2

$(window).on('scroll', function() {
if($(this).scrollTop() > 100) {

}
})

Offhand, no errors