我已经得到了使用innerHTML插入某些内容元素的脚本。
内容可以是例如：
<script type="text/javascript">alert('test');</script>
<strong>test</strong>
问题是，<script>标签里面的代码没有得到执行。我GOOGLE了它一下，但没有明显的解决方案。如果我插入使用jQuery内容$(element).append(content);the脚本部分得到了被注入到DOM之前eval'd。
有没有人得到的代码片段执行所有<script>元素？ jQuery代码有点复杂，所以我无法真正弄清楚它是怎么做。
编辑：
通过窥探jQuery代码我已经设法找出jQuery的是怎么做的，这导致了下面的代码：
Demo:
<div id="element"></div>
<script type="text/javascript">
function insertAndExecute(id, text)
{
domelement = document.getElementById(id);
domelement.innerHTML = text;
var scripts = [];
ret = domelement.childNodes;
for ( var i = 0; ret[i]; i++ ) {
if ( scripts && nodeName( ret[i], "script" ) && (!ret[i].type || ret[i].type.toLowerCase() === "text/javascript") ) {
scripts.push( ret[i].parentNode ? ret[i].parentNode.removeChild( ret[i] ) : ret[i] );
}
}
for(script in scripts)
{
evalScript(scripts[script]);
}
}
function nodeName( elem, name ) {
return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
}
function evalScript( elem ) {
data = ( elem.text || elem.textContent || elem.innerHTML || "" );
var head = document.getElementsByTagName("head")[0] || document.documentElement,
script = document.createElement("script");
script.type = "text/javascript";
script.appendChild( document.createTextNode( data ) );
head.insertBefore( script, head.firstChild );
head.removeChild( script );
if ( elem.parentNode ) {
elem.parentNode.removeChild( elem );
}
}
insertAndExecute("element", "<scri"+"pt type='text/javascript'>document.write('This text should appear as well.')</scr"+"ipt><strong>this text should also be inserted.</strong>");
</script>
该OP的脚本不能在IE 7. SO工作提供帮助，下面是做一个脚本：
exec_body_scripts: function(body_el) {
// Finds and executes scripts in a newly added element's body.
// Needed since innerHTML does not run scripts.
//
// Argument body_el is an element in the dom.
function nodeName(elem, name) {
return elem.nodeName && elem.nodeName.toUpperCase() ===
name.toUpperCase();
};
function evalScript(elem) {
var data = (elem.text || elem.textContent || elem.innerHTML || "" ),
head = document.getElementsByTagName("head")[0] ||
document.documentElement,
script = document.createElement("script");
script.type = "text/javascript";
try {
// doesn't work on ie...
script.appendChild(document.createTextNode(data));
} catch(e) {
// IE has funky script nodes
script.text = data;
}
head.insertBefore(script, head.firstChild);
head.removeChild(script);
};
// main section of function
var scripts = [],
script,
children_nodes = body_el.childNodes,
child,
i;
for (i = 0; children_nodes[i]; i++) {
child = children_nodes[i];
if (nodeName(child, "script" ) &&
(!child.type || child.type.toLowerCase() === "text/javascript")) {
scripts.push(child);
}
}
for (i = 0; scripts[i]; i++) {
script = scripts[i];
if (script.parentNode) {script.parentNode.removeChild(script);}
evalScript(scripts[i]);
}
};
它更容易使用jquery $(parent).html(code)代替parent.innerHTML = code的：
var oldDocumentWrite = document.write;
var oldDocumentWriteln = document.writeln;
try {
document.write = function(code) {
$(parent).append(code);
}
document.writeln = function(code) {
document.write(code + "<br/>");
}
$(parent).html(html);
} finally {
$(window).load(function() {
document.write = oldDocumentWrite
document.writeln = oldDocumentWriteln
})
}
这也适用于使用document.write并通过src属性加载脚本的脚本。不幸的是，即使这不符合谷歌AdSense的脚本。
做就是了：
document.body.innerHTML = '<img src="../images/loaded.gif" alt="" onload="alert(\'test\');this.parentNode.removeChild(this);" />';
你可以看看this post。代码可能是这样的：
var actualDivToBeUpdated = document.getElementById('test');
var div = document.createElement('div');
div.innerHTML = '<script type="text/javascript">alert("test");<\/script>';
var children = div.childNodes;
actualDivToBeUpdated.innerHTML = '';
for(var i = 0; i < children.length; i++) {
actualDivToBeUpdated.appendChild(children[i]);
}
感谢拉里的脚本，它工作得很好的IE10，这是我用过的内容：
$('#' + id)[0].innerHTML = result;
$('#' + id + " script").each(function() { this.text = this.text || $(this).text();} );
尝试函数eval（）。
data.newScript = '<script type="text/javascript">//my script...</script>'
var element = document.getElementById('elementToRefresh');
element.innerHTML = data.newScript;
eval(element.firstChild.innerHTML);
这是我正在开发一个项目，一个真实的例子。由于这个post
扩展关拉里的。我做了递归搜索整个块和子节点。 该脚本现在也将调用与src参数指定的外部脚本。脚本被附加到头部，而不是插入并放置在它们被发现的次序。那么具体的命令脚本保存。并且每个脚本执行同步类似于浏览器如何处理初始加载DOM。所以，如果你有一个脚本块从CDN调用jQuery和比下一个脚本节点使用jQuery的...没有概率！哦，我有一个序列化的ID标签的附加脚本基于关闭的你在标签参数设置，所以你能找到什么该脚本添加。
exec_body_scripts: function(body_el, tag) {
// Finds and executes scripts in a newly added element's body.
// Needed since innerHTML does not run scripts.
//
// Argument body_el is an element in the dom.
function nodeName(elem, name) {
return elem.nodeName && elem.nodeName.toUpperCase() ===
name.toUpperCase();
};
function evalScript(elem, id, callback) {
var data = (elem.text || elem.textContent || elem.innerHTML || "" ),
head = document.getElementsByTagName("head")[0] ||
document.documentElement;
var script = document.createElement("script");
script.type = "text/javascript";
if (id != '') {
script.setAttribute('id', id);
}
if (elem.src != '') {
script.src = elem.src;
head.appendChild(script);
// Then bind the event to the callback function.
// There are several events for cross browser compatibility.
script.onreadystatechange = callback;
script.onload = callback;
} else {
try {
// doesn't work on ie...
script.appendChild(document.createTextNode(data));
} catch(e) {
// IE has funky script nodes
script.text = data;
}
head.appendChild(script);
callback();
}
};
function walk_children(node) {
var scripts = [],
script,
children_nodes = node.childNodes,
child,
i;
if (children_nodes === undefined) return;
for (i = 0; i<children_nodes.length; i++) {
child = children_nodes[i];
if (nodeName(child, "script" ) &&
(!child.type || child.type.toLowerCase() === "text/javascript")) {
scripts.push(child);
} else {
var new_scripts = walk_children(child);
for(j=0; j<new_scripts.length; j++) {
scripts.push(new_scripts[j]);
}
}
}
return scripts;
}
var i = 0;
function execute_script(i) {
script = scripts[i];
if (script.parentNode) {script.parentNode.removeChild(script);}
evalScript(scripts[i], tag+"_"+i, function() {
if (i < scripts.length-1) {
execute_script(++i);
}
});
}
// main section of function
if (tag === undefined) tag = 'tmp';
var scripts = walk_children(body_el);
execute_script(i);
}
试试这个，它为我工作在Chrome，Safari和Firefox：
var script = document.createElement('script');
script.innerHTML = 'console.log("hi")';
document.body.appendChild(script);
--> logs "hi"
但有一两件事要注意的是，以下DIV嵌套的脚本将不会运行：
var script = document.createElement('div');
script.innerHTML = '<script>console.log("hi")</script>';
document.body.appendChild(script);
--> doesn't log anything
对于一个脚本来运行它，必须创建一个节点，然后附加一个孩子。你甚至可以追加一个脚本之前注入的div内与它将运行（我试图让广告服务器代码工作的时候才碰到的这个）：
var div = document.createElement('div');
div.id = 'test-id';
document.body.appendChild(div);
var script = document.createElement('script');
script.innerHTML = 'console.log("hi")';
document.getElementById('test-id').appendChild(script);
--> logs "hi"
花费Lambder的答案
document.body.innerHTML = '<img src="../images/loaded.gif" alt="" > onload="alert(\'test\');this.parentNode.removeChild(this);" />';
您可以使用的base64图像创建并加载脚本
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAZdEVYdFNvZnR3YXJlAHBhaW50Lm5ldCA0LjAuMjHxIGmVAAAADUlEQVQYV2P4//8/AwAI/AL+iF8G4AAAAABJRU5ErkJggg=="
onload="var script = document.createElement('script'); script.src = './yourCustomScript.js'; parentElement.append(script);" />
或者，如果你有一个Iframe，你可以用它代替
<iframe src='//your-orginal-page.com' style='width:100%;height:100%'
onload="var script = document.createElement('script'); script.src = './your-coustom-script.js'; parentElement.append(script);"
frameborder='0'></iframe>
我需要类似的东西，但所需要的脚本来保持或在同一地点的原始脚本重新创建，因为我的剧本在DOM创建/目标元素的目标脚本标签的位置。我还做了递归脚本，以确保它也适用，如果它是一个以上的水平下降。
注：我用const在这里，如果你有一个旧的浏览器，只需使用var。
window.exec_body_scripts = function(body_el) {
// ref: https://stackoverflow.com/questions/2592092/executing-script-elements-inserted-with-innerhtml based on Larry K's answer
// Finds and executes scripts in a newly added element's body.
// Needed since innerHTML does not run scripts.
//
// Argument body_el is an element in the dom.
const
type__Js = 'text/javascript',
tagName__Script = 'script',
tagName__Script__Upper = tagName__Script.toUpperCase();
var scripts = [], script, i;
function evalScript(elem) {
var parent = elem.parentNode,
data = (elem.text || elem.textContent || elem.innerHTML || ""),
script = document.createElement(tagName__Script);
script.type = type__Js;
try {
// doesn't work on ie...
script.appendChild(document.createTextNode(data));
} catch (e) {
// IE has funky script nodes
script.text = data;
}
// Make sure to re-insert the script at the same position
// to make sure scripts that target their position
// in the DOM function as expected.
var parent = elem.parentNode;
parent.insertBefore(script, elem);
parent.removeChild(elem);
};
// Get all scripts (recursive)
if (typeof (document.querySelectorAll) !== typeof (void 0)) {
document.querySelectorAll('script').forEach((scr) => { if (!scr.type || scr.type.toLowerCase() === type__Js) scripts.push(scr); });
}
else {
var children_nodes = body_el.childNodes, child;
for (i = 0; children_nodes[i]; i++) {
child = children_nodes[i];
if (
child.nodeName
&&
child.nodeName.toUpperCase() === tagName__Script__Upper
&&
(
!child.type
||
child.type.toLowerCase() === type__Js
)
) {
scripts.push(child);
}
// Recursive call
window.exec_body_scripts(child);
}
}
for (i = 0; scripts[i]; i++) {
evalScript(scripts[i]);
}
};
这是我在最近的一个项目的解决方案。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Sample</title>
</head>
<body>
<h1 id="hello_world">Sample</h1>
<script type="text/javascript">
var div = document.createElement("div");
var t = document.createElement('template');
t.innerHTML = "Check Console tab for javascript output: Hello world!!!<br/><script type='text/javascript' >console.log('Hello world!!!');<\/script>";
for (var i=0; i < t.content.childNodes.length; i++){
var node = document.importNode(t.content.childNodes[i], true);
div.appendChild(node);
}
document.body.appendChild(div);
</script>
</body>
</html>@phidah ......这是一个非常有趣的解决问题的方法：http://24ways.org/2005/have-your-dom-and-script-it-too
因此，它是这样的，而不是：
<img src="empty.gif" onload="alert('test');this.parentNode.removeChild(this);" />
这里有一个更短，更高效的脚本，也适用于与src财产脚本：
function insertAndExecute(id, text) {
document.getElementById(id).innerHTML = text;
var scripts = Array.prototype.slice.call(document.getElementById(id).getElementsByTagName("script"));
for (var i = 0; i < scripts.length; i++) {
if (scripts[i].src != "") {
var tag = document.createElement("script");
tag.src = scripts[i].src;
document.getElementsByTagName("head")[0].appendChild(tag);
}
else {
eval(scripts[i].innerHTML);
}
}
}
注：虽然eval可能会导致如果不正确使用安全漏洞，它比动态创建脚本标记快得多。
你不应该使用innerHTML属性，而是节点的方法的appendChild：在文档树[HTML DOM]一个节点。这样，你可以稍后打电话给你注入的代码。
请确保你明白，node.innerHTML是不一样的node.appendChild。您可能需要花一些时间了解更多详细信息和DOM JavaScript客户端参考。希望下面的帮助...
样品注入作品：
<html>
<head>
<title>test</title>
<script language="javascript" type="text/javascript">
function doOnLoad(){
addScript('inject',"function foo(){ alert('injected'); }");
}
function addScript(inject,code){
var _in = document.getElementById('inject');
var scriptNode = document.createElement('script');
scriptNode.innerHTML = code;
_in.appendChild(scriptNode);
}
</script>
</head>
<body onload="doOnLoad();">
<div id="header">some content</div>
<div id="inject"></div>
<input type="button" onclick="foo(); return false;" value="Test Injected" />
</body>
</html>
问候，
试试这个片断：
function stripAndExecuteScript(text) {
var scripts = '';
var cleaned = text.replace(/<script[^>]*>([\s\S]*?)<\/script>/gi, function(){
scripts += arguments[1] + '\n';
return '';
});
if (window.execScript){
window.execScript(scripts);
} else {
var head = document.getElementsByTagName('head')[0];
var scriptElement = document.createElement('script');
scriptElement.setAttribute('type', 'text/javascript');
scriptElement.innerText = scripts;
head.appendChild(scriptElement);
head.removeChild(scriptElement);
}
return cleaned;
};
var scriptString = '<scrip' + 't + type="text/javascript">alert(\'test\');</scr' + 'ipt><strong>test</strong>';
document.getElementById('element').innerHTML = stripAndExecuteScript(scriptString);
简体版ES6 @ joshcomley的一个示例答案。
无JQuery的，没有图书馆，没有EVAL，无DOM变化，只是纯粹的JavaScript。
http://plnkr.co/edit/MMegiu?p=preview
var setInnerHTML = function(elm, html) {
elm.innerHTML = html;
Array.from(elm.querySelectorAll("script")).forEach( oldScript => {
const newScript = document.createElement("script");
Array.from(oldScript.attributes)
.forEach( attr => newScript.setAttribute(attr.name, attr.value) );
newScript.appendChild(document.createTextNode(oldScript.innerHTML));
oldScript.parentNode.replaceChild(newScript, oldScript);
});
}
用法
$0.innerHTML = HTML; // does *NOT* run <script> tags in HTML
setInnerHTML($0, HTML); // does run <script> tags in HTML
function insertHtml(id, html)
{
var ele = document.getElementById(id);
ele.innerHTML = html;
var codes = ele.getElementsByTagName("script");
for(var i=0;i<codes.length;i++)
{
eval(codes[i].text);
}
}
它的工作原理在Chrome在我的项目
不使用“EVAL” A的解决方案：
var setInnerHtml = function(elm, html) {
elm.innerHTML = html;
var scripts = elm.getElementsByTagName("script");
// If we don't clone the results then "scripts"
// will actually update live as we insert the new
// tags, and we'll get caught in an endless loop
var scriptsClone = [];
for (var i = 0; i < scripts.length; i++) {
scriptsClone.push(scripts[i]);
}
for (var i = 0; i < scriptsClone.length; i++) {
var currentScript = scriptsClone[i];
var s = document.createElement("script");
// Copy all the attributes from the original script
for (var j = 0; j < currentScript.attributes.length; j++) {
var a = currentScript.attributes[j];
s.setAttribute(a.name, a.value);
}
s.appendChild(document.createTextNode(currentScript.innerHTML));
currentScript.parentNode.replaceChild(s, currentScript);
}
}
这实质上克隆script标签，然后替换为新生成的一个阻塞的脚本标签，从而允许执行。
scriptNode.innerHTML = code没有为IE浏览器。这样做的唯一的事情是scriptNode.text = code更换和它做工精细