實時監聽input值的改變
阿新 • • 發佈：2019-02-13
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>input value</title> <script type="text/javascript" src="jquery.2.js"></script> <script src="http://code.jquery.com/jquery-migrate-1.2.1.js"></script> </head> <body> <table> <tr> <td>此處值通過js設定：</td> <td><input id="jsUserName" type="text" name="jsUserName" disabled="disabled" /></td> </tr> <tr> <td>此處輸入值：</td> <td><input id="userName" type="text" name="userName"/></td> </tr> </table> <script type="text/javascript"> $(function() { var jsUserName = ""; if($.browser.msie) // IE瀏覽器 { $("#userName").get(0).onpropertychange = setJsUserName; $("#jsUserName").get(0).onpropertychange = handle; } else // 其他瀏覽器 { var intervalName; //定時器控制代碼 $("#userName").get(0).addEventListener("input",setJsUserName,false); // 獲得焦點時，啟動定時器 $("#userName").focus(function(){ intervalName = setInterval(handle,1000); }); // 失去焦點時，清除定時器 $("#userName").blur(function() { clearInterval(intervalName); }); } // 設定jsUserName input的值 function setJsUserName() { $("#jsUserName").val($(this).val()); } // jsUserName input的值改變時執行的函式 function handle() { // IE瀏覽器此處判斷沒什麼意義，但為了統一，且提取公共程式碼而這樣處理。 if($("#jsUserName").val() != jsUserName) { $("#toolTip").remove(); $("#jsUserName").parent().append("<span id='toolTip'>看到這裡的資訊表明，通過js改變input的值也能響應相應事件：<span style='color:red;'>" + $("#jsUserName").val() + "</span></span>"); jsUserName = $("#jsUserName").val(); } } }); </script> </body> </html>
/***************************此處需要引入jquery-migrate.js來相容jquery1.9之後的版本，已經下載如下：*******************************//*!
* jQuery Migrate - v1.2.1 - 2013-05-08
* https://github.com/jquery/jquery-migrate
* Copyright 2005, 2013 jQuery Foundation, Inc. and other contributors; Licensed MIT
*/
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// See http://bugs.jquery.com/ticket/13335
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[];
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