我试图延迟一个
AJAX请求,以便在输入单元的最后一个键盘后2-3秒发送它.
到目前为止,我已设法延迟请求,但在2-3秒后,我收到一个请求发送给该字段中的每个密钥…
如何让jQuery取消第一个并发送最后一个keyup?
这是迄今为止的代码:
到目前为止,我已设法延迟请求,但在2-3秒后,我收到一个请求发送给该字段中的每个密钥…
如何让jQuery取消第一个并发送最后一个keyup?
这是迄今为止的代码:
$('#lastname').focus(function(){ $('.terms :input').val(""); //clears other search fields }).keyup(function(){ caps(this); //another function that capitalizes the field $type = $(this).attr("id"); // just passing the type of desired search to the PHP file setTimeout(function(){ // setting the delay for each keypress ajaxSearchRequest($type); //runs the ajax request },1000); });
上面的代码等待1秒,然后根据按键发送4-5个AJAX请求.
我只想在最后一个密钥后发送一个
我在StackOverflow中发现了一些使用Javascript的类似解决方案,但由于我对编程知之甚少,我无法将它们实现到我的项目中.
$('#lastname').focus(function(){ $('.terms :input').val(""); }).keyup(function(){ caps(this); $type = $(this).attr("id"); window.timer=setTimeout(function(){ // setting the delay for each keypress ajaxSearchRequest($type); //runs the ajax request },3000); }).keydown(function(){clearTimeout(window.timer);});
这是ajaxSearchRequest代码:
function ajaxSearchRequest($type){ var ajaxRequest2; // The variable that makes Ajax possible! try{ // Opera 8.0+,Firefox,Safari ajaxRequest2 = new XMLHttpRequest(); }catch (e){ // Internet Explorer Browsers try{ ajaxRequest2 = new ActiveXObject("Msxml2.XMLHTTP"); }catch (e) { try{ ajaxRequest2 = new ActiveXObject("Microsoft.XMLHTTP"); }catch (e){ // Something went wrong alert("Browser error!"); return false; } } } ajaxRequest2.onreadystatechange = function(){ if(ajaxRequest2.readyState == 4){ $result = ajaxRequest2.responseText; $('#resultcontainer').html($result); }} var searchterm = document.getElementById($type).value; var queryString ="?searchterm=" + searchterm +"&type=" +$type; if(searchterm !== ""){ ajaxRequest2.open("GET","searchrequest.PHP" + queryString,true); ajaxRequest2.send(null); } }
解决方法
将超时存储在变量中,这样您就可以清除最近的超时:
clearTimeout(window.timer); window.timer=setTimeout(function(){ // setting the delay for each keypress ajaxSearchRequest($type); //runs the ajax request },3000);