Learning jQuery 3 - Fifth Edition

Other ways to perform throttling

The throttling technique we've implemented is efficient and simple, but it is not the only solution. Depending on the performance characteristics of the action being throttled and typical interaction with the page, we may, for instance, want to institute a single timer for the page rather than create one when an event begins:

$(() => {   var scrolled = false;  $(window)    .scroll(() => {      scrolled = true;    });  setInterval(() => {    if (scrolled) {      checkScrollPosition();      scrolled = false;    }  }, 250);  checkScrollPosition();}); 

Listing 10.15

Unlike our previous throttling code, this polling solution uses a single call to the JavaScript setInterval() function to begin checking the state of the scrolled variable every ...