Javascript 在 AJAX 调用时不起作用

Question

I have a page which does an AJAX call and loads an entire page.我有一个页面，它执行 AJAX 调用并加载整个页面。 The page that gets loaded has some Javascript.加载的页面有一些 Javascript。 The javascript works on page by itself when loaded, but when its gets loaded by AJAX, the Javascript does not work. javascript 在加载时自己在页面上工作，但是当它被 AJAX 加载时，Javascript 不起作用。 I dont know what I am missing.我不知道我错过了什么。

The code of the loaded page加载页面的代码

<html>
<script type="text/javascript">
function showfield(name){
if(name=='lstbox')document.getElementById('div1').style.display="block";
else document.getElementById('div1').style.display="none";
}

function hidefield() {
document.getElementById('div1').style.display='none';
}

</script>

<head>
</head>
<body onload="hidefield()">
<form action = "test2.php" method = "post">

Please enter a name for the App <input type = "text" name = "name">

<table border = "1"><tr><th>Choose a Label</th><th>Choose an element</th></tr>

<tr><td><input type = "text" name = "label1" /></td> <td> 

<select name = "elementtype1" id="elementtype1" onchange="showfield(this.options[this.selectedIndex].value)">

<option value = 'select'> Select </option>

<option value='txtbox'>Text Box</option>

<option value='lstbox'>List Box</option>

<option value='chkbox'>Check Box</option>

<option value='radio'>Radio Button</option>

</select></td><td><div id="div1">Enter Listbox options: <input type="text" name="whatever1" /></div></td></tr>

</table>

<input type = "submit" value = "Submit">

</form>

</body>

</html>

The code of the loading(AJAX) page is加载（AJAX）页面的代码是

<html>
<head>
</head>
<body>

<script src="ajax.js" type="text/javascript"></script>
<script src="responseHTML.js" type="text/javascript"></script>

<div id="storage" style="display:none;">
</div>

<div id="displayed">



<FORM name="ajax" method="POST" action="">
    <p>

    <INPUT type="BUTTON" value="Get the Panel"  ONCLICK="loadWholePage('appcreator.php')">

    </p>

</FORM>
</div>



</body>
</html>

The ajax.js code ajax.js 代码

function createXHR() 
{
    var request = false;
        try {
            request = new ActiveXObject('Msxml2.XMLHTTP');
        }
        catch (err2) {
            try {
                request = new ActiveXObject('Microsoft.XMLHTTP');
            }
            catch (err3) {
        try {
            request = new XMLHttpRequest();
        }
        catch (err1) 
        {
            request = false;
        }
            }
        }
    return request;
}

The responseHTML.js code responseHTML.js 代码

function getBody(content) 
{
   test = content.toLowerCase();    // to eliminate case sensitivity
   var x = test.indexOf("<body");
   if(x == -1) return "";

   x = test.indexOf(">", x);
   if(x == -1) return "";

   var y = test.lastIndexOf("</body>");
   if(y == -1) y = test.lastIndexOf("</html>");
   if(y == -1) y = content.length;    // If no HTML then just grab everything till end

   return content.slice(x + 1, y);   
} 

/**
    Loads a HTML page
    Put the content of the body tag into the current page.
    Arguments:
        url of the other HTML page to load
        id of the tag that has to hold the content
*/      

function loadHTML(url, fun, storage, param)
{
    var xhr = createXHR();
    xhr.onreadystatechange=function()
    { 
        if(xhr.readyState == 4)
        {
            //if(xhr.status == 200)
            {
                storage.innerHTML = getBody(xhr.responseText);
                fun(storage, param);
            }
        } 
    }; 

    xhr.open("GET", url , true);
    xhr.send(null); 

} 

    /**
        Callback
        Assign directly a tag
    */      


    function processHTML(temp, target)
    {
        target.innerHTML = temp.innerHTML;
    }

    function loadWholePage(url)
    {
        var y = document.getElementById("storage");
        var x = document.getElementById("displayed");
        loadHTML(url, processHTML, x, y);
    }   


    /**
        Create responseHTML
        for acces by DOM's methods
    */  

    function processByDOM(responseHTML, target)
    {
        target.innerHTML = "Extracted by id:<br />";

        // does not work with Chrome/Safari
        //var message = responseHTML.getElementsByTagName("div").namedItem("two").innerHTML;
        var message = responseHTML.getElementsByTagName("div").item(1).innerHTML;

        target.innerHTML += message;

        target.innerHTML += "<br />Extracted by name:<br />";

        message = responseHTML.getElementsByTagName("form").item(0);
        target.innerHTML += message.dyn.value;
    }

    function accessByDOM(url)
    {
        //var responseHTML = document.createElement("body");    // Bad for opera
        var responseHTML = document.getElementById("storage");
        var y = document.getElementById("displayed");
        loadHTML(url, processByDOM, responseHTML, y);
    }

Answer 1

Javascript loaded in HTML through AJAX will not be executed.不会执行通过 AJAX 加载到 HTML 中的 Javascript。

If you want to include scripts dynamically, append <script> tags to the existing loaded page's <head> element.如果要动态包含脚本，请将<script>标记附加到现有加载页面的<head>元素。

Answer 2

execute the script with jquery rather than with innerHTML使用 jquery 而不是 innerHTML 执行脚本

//this is not working! 
document.getElementById("chart-content").innerHTML = this.responseText;

//try this
$("#chart-content").html(this.responseText);

Answer 3

脚本在 body 标签之外，加载器只挑选 body 标签内的代码，所以脚本甚至不是您添加到页面的内容的一部分。

Answer 4

Loading you Js within the <head> should work.在<head>加载 Js 应该可以工作。 use this.用这个。

if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', loadJs);
} else {
    loadJs();
}

function loadJs() {
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.src = '/assets/script/editor-controlls.js';
    script.defer = true
    document.getElementsByTagName('head')[0].appendChild(script);
}

Javascript 在 AJAX 调用时不起作用

问题描述

4 个解决方案

解决方案1
5 2011-04-11 19:42:46

解决方案2
1 2019-03-14 10:10:47

解决方案3
0 已采纳 2011-04-11 19:49:58

解决方案4
0 2020-07-25 18:51:24

Javascript 在 AJAX 调用时不起作用

问题描述

4 个解决方案

解决方案1 5 2011-04-11 19:42:46

解决方案2 1 2019-03-14 10:10:47

解决方案3 0 已采纳 2011-04-11 19:49:58

解决方案4 0 2020-07-25 18:51:24

解决方案1
5 2011-04-11 19:42:46

解决方案2
1 2019-03-14 10:10:47

解决方案3
0 已采纳 2011-04-11 19:49:58

解决方案4
0 2020-07-25 18:51:24