I believe your assessment on detection is accurate because various devices have different capabilities when it comes to touch and mouse interactions. Some devices, like Windows 8 tablets, support both touch and mouse behaviors, while others, such as phones, only support touch, and desktops may only support mouse. This diversity makes it challenging to definitively categorize a device based on behavior since some devices could possibly have both touch and mouse capabilities.
If your goal is to determine whether to respond immediately to every scroll event or introduce a short delay to analyze the scroll destination, you can implement a hybrid solution that caters to both scenarios.
var lastScroll = new Date();
var scrollTimer;
window.onscroll = function(e) {
function doScroll(e) {
// insert your scroll logic here
}
if (scrollTimer) {
clearTimeout(scrollTimer);
scrollTimer = null;
}
var now = new Date();
if (now - lastScroll < 500){
scrollTimer = setTimeout(function() {
scrollTimer = null;
doScroll(e);
}, 1000);
} else {
doScroll(e);
}
lastScroll = now;
};
doScroll() represents your scroll processing algorithm.
This method combines elements of immediate response and delayed reaction. It triggers an action upon the first scroll event received after a period of no recent activity. In a scenario where multiple scroll events occur consecutively, it responds to the initial event and waits for a brief pause before proceeding further.
You might need to adjust two specific time thresholds. The first parameter dictates how closely spaced scroll events should be considered rapid succession from a single user action (currently set at 500ms). The second parameter controls the duration of inactivity required to process the current scroll position under the assumption that the user has stopped moving the scrollbar (currently set to 1s).