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);      
});

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/

如果有必要让用户离开字段，我们可以使用“onBlur”而不是Javascript中的Onchange

  <TextField id="outlined-basic"  variant="outlined" defaultValue={CardValue} onBlur={cardTitleFn} />

如果这是不必要的设置定时器将是一个很好的选择。

很晚的答案，但我添加它是因为现在是2019年，这完全可以用漂亮的ES6实现，没有第三方库，而且我发现大多数高评分的答案都很笨重，有太多变量。

优雅的解决方案从这篇优秀的博客文章。

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

window.addEventListener('keyup', debounce( () => {
    // code you would like to run 1000ms after the keyup event has stopped firing
    // further keyup events reset the timer, as expected
}, 1000))

如果你需要等待，直到用户完成输入使用简单的这个:

$(document).on('change','#PageSize', function () {
    //Do something after new value in #PageSize       
});

使用ajax调用的完整示例-这适用于我的寻呼机-每个列表的项目计数:

$(document).ready(function () {
    $(document).on('change','#PageSize', function (e) {
        e.preventDefault();
        var page = 1;
        var pagesize = $("#PageSize").val();
        var q = $("#q").val();
        $.ajax({
            url: '@Url.Action("IndexAjax", "Materials", new { Area = "TenantManage" })',
            data: { q: q, pagesize: pagesize, page: page },
            type: 'post',
            datatype: "json",
            success: function (data) {
                $('#tablecontainer').html(data);
               // toastr.success('Pager has been changed', "Success!");
            },
            error: function (jqXHR, exception) {
                ShowErrorMessage(jqXHR, exception);
            }
        });  
    });
});    

我觉得解决方案有点简单的输入事件:

var typingTimer;
var doneTypingInterval = 500;

$("#myInput").on("input", function () {
    window.clearTimeout(typingTimer);
    typingTimer = window.setTimeout(doneTyping, doneTypingInterval);
});

function doneTyping () {
    // code here
}