我喜欢Surreal Dream的答案，但我发现我的“doneTyping”函数会在每次按键时触发，即如果你快速输入“Hello”;当您停止输入时，该函数将触发5次，而不是只触发一次。

问题是javascript的setTimeout函数似乎不会覆盖或杀死任何旧的超时设置，但如果你自己做它工作!因此，如果设置了typingTimer，我只是在setTimeout之前添加了一个clearTimeout调用。见下文:

//setup before functions
var typingTimer;                //timer identifier
var doneTypingInterval = 5000;  //time in ms, 5 second for example

//on keyup, start the countdown
$('#myInput').on("keyup", function(){
    if (typingTimer) clearTimeout(typingTimer);                 // Clear if already set     
    typingTimer = setTimeout(doneTyping, doneTypingInterval);
});

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

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

注意:我本来想把这句话作为对Surreal Dream的回答的评论，但我是一个新用户，没有足够的声誉。对不起!

如果您正在寻找特定的长度(例如邮政编码字段):

$("input").live("keyup", function( event ){
if(this.value.length == this.getAttribute('maxlength')) {
        //make ajax request here after.
    }
  });

哇，甚至有3条评论都是正确的!

Empty input is not a reason to skip function call, e.g. I remove waste parameter from url before redirect .on ('input', function() { ... }); should be used to trigger keyup, paste and change events definitely .val() or .value must be used You can use $(this) inside event function instead of #id to work with multiple inputs (my decision) I use anonymous function instead of doneTyping in setTimeout to easily access $(this) from n.4, but you need to save it first like var $currentInput = $(this);

编辑我看到有些人不理解没有复制粘贴就绪代码的指示。在这里你

var typingTimer;
//                  2
$("#myinput").on('input', function () {
    //             4     3
    var input = $(this).val();
    clearTimeout(typingTimer);
    //                           5
    typingTimer = setTimeout(function() {
        // do something with input
        alert(input);
    }, 5000);      
});

同意@going的答案。下面是另一个类似的解决方案。唯一的区别是我使用的是.on("input"…)而不是keyup。这只捕获输入中的更改。其他按键如Ctrl, Shift等被忽略

var typingTimer;                //timer identifier
var doneTypingInterval = 5000;  //time in ms (5 seconds)

//on input change, start the countdown

$('#myInput').on("input", function() {    
    clearTimeout(typingTimer);
    typingTimer = setTimeout(function(){
        // doSomething...
    }, doneTypingInterval);
});

我需要为特定的控制运行我的程序，这对我来说很有效:

function debounce(func, timeout) {
            let timer;
            return (...args) => {
                clearTimeout(timer);
                timer = setTimeout(() => { func.apply(this, args); }, timeout);
            };
        }

$('#txtFilterClientCode').keyup(debounce(function () {
            console.log("Test");
        }, 1000));

var timer;
var timeout = 1000;

$('#in').keyup(function(){
    clearTimeout(timer);
    if ($('#in').val) {
        timer = setTimeout(function(){
            //do stuff here e.g ajax call etc....
             var v = $("#in").val();
             $("#out").html(v);
        }, timeout);
    }
});

完整的例子:http://jsfiddle.net/ZYXp4/8/