jQuery run function after user finished typing

script.js

let typingTimer;                //timer identifier
let doneTypingInterval = 1500;  //time in ms, 5 second for example
let $input = $('.search-sidebar-ui-blocks');

//on keyup, start the countdown
$input.on('keyup', function () {
    clearTimeout(typingTimer);
    typingTimer = setTimeout(doneTyping, doneTypingInterval);
});

//on keydown, clear the countdown
$input.on('keydown', function () {
    clearTimeout(typingTimer);
});

//user is "finished typing," do something
function doneTyping() {
    // do something here..
}