如何禁用JavaScript搜索自动完成功能上的多个请求？

Question

I am using Turbolinks.visit action, via $(document).on("input"); ...

Html

<form id="mainSearch" method="get" autocomplete="off">
    <input type="search" name="s" placeholder="Search" />
</form>

Javascript

$(document).off().on("input", "#mainSearch", function(e) {

        e.stopImmediatePropagation();
        e.stopPropagation();
        e.preventDefault();

        var ser     = $(this).serialize();

        setTimeout(function(){
            Turbolinks.visit(
                homeurl+"/?"+ser,
                {
                    change: ['content']
                }
            );
        },110);

        return false;
    });  

It is working right but event fired multiple request when hold down a key.

do how I take precautions to keep it pressed? .on("input"

Answer 1

Did you forget to cancel the previous timer?

var timer = null;

$(document).off().on("input", "#mainSearch", function(e) {

    e.stopImmediatePropagation();
    e.stopPropagation();
    e.preventDefault();

    var ser= $(this).serialize();

    clearInterval(timer);

    timer = setTimeout(function(){
        Turbolinks.visit(
            homeurl+"/?"+ser,
            {
                change: ['content']
            }
        );
    },110);

    return false;
});  

Edit: Instead of re-inventing the wheel it's always a good choice to use existing solutions, $.debounce() is what you are looking for.

Answer 2

You might be looking for https://stackoverflow.com/a/27787793/5523033 since you're using JQuery you can use $.debounce

and here's a few examples to play around with http://jsfiddle.net/cowboy/cTZJU/