我尝试在<div>上使用innerHTML加载一些脚本到页面中。脚本似乎加载到DOM中，但它从未执行(至少在Firefox和Chrome中)。有一种方法让脚本执行时插入他们与innerHTML?
示例代码:
<！DOCTYPE html > < html > <身体onload = " . getelementbyid(机)。innerHTML = '<script>alert(\'hi\')<\/script>'"> 难道不应该出现“hi”的提醒吗? < div id = "装载机" > < / div > 身体< / > < / html >
当前回答
下面是一个递归函数来设置一个元素的innerHTML，我在我们的广告服务器中使用:
// o: container to set the innerHTML
// html: html text to set.
// clear: if true, the container is cleared first (children removed)
function setHTML(o, html, clear) {
if (clear) o.innerHTML = "";
// Generate a parseable object with the html:
var dv = document.createElement("div");
dv.innerHTML = html;
// Handle edge case where innerHTML contains no tags, just text:
if (dv.children.length===0){ o.innerHTML = html; return; }
for (var i = 0; i < dv.children.length; i++) {
var c = dv.children[i];
// n: new node with the same type as c
var n = document.createElement(c.nodeName);
// copy all attributes from c to n
for (var j = 0; j < c.attributes.length; j++)
n.setAttribute(c.attributes[j].nodeName, c.attributes[j].nodeValue);
// If current node is a leaf, just copy the appropriate property (text or innerHTML)
if (c.children.length == 0)
{
switch (c.nodeName)
{
case "SCRIPT":
if (c.text) n.text = c.text;
break;
default:
if (c.innerHTML) n.innerHTML = c.innerHTML;
break;
}
}
// If current node has sub nodes, call itself recursively:
else setHTML(n, c.innerHTML, false);
o.appendChild(n);
}
}
你可以在这里看到演示。
其他回答
我自己的扭曲，使用现代JS和typescript。不知道为什么人们过滤tagName等时，querySelector就在那里。
对我来说很有魅力:
function makeScriptsExecutable(el: Element) {
el.querySelectorAll("script").forEach(script => {
const clone = document.createElement("script")
for (const attr of script.attributes) {
clone.setAttribute(attr.name, attr.value)
}
clone.text = script.innerHTML
script.parentNode?.replaceChild(clone, script)
})
}
尝试使用template和document.importNode。这里有一个例子:
<!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>
根据Danny '365CSI' Engelman的评论，这里有一个通用的解决方案:
<script>
alert("This script always runs.");
script01 = true;
</script>
<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"
onload="if(typeof script01==='undefined') eval(this.previousElementSibling.innerHTML)">
使用它作为innerHTML(即由XMLHttpRequest加载)或直接(即由PHP后端插入)，脚本总是加载一次。
解释:脚本加载innerHTML不执行，但onload内容属性是。如果脚本没有执行(作为innerHTML添加)，那么脚本将在image onload事件中执行。如果脚本已加载(由后端添加)，则定义script01变量，onload将不会第二次运行脚本。
下面是一个递归函数来设置一个元素的innerHTML，我在我们的广告服务器中使用:
// o: container to set the innerHTML
// html: html text to set.
// clear: if true, the container is cleared first (children removed)
function setHTML(o, html, clear) {
if (clear) o.innerHTML = "";
// Generate a parseable object with the html:
var dv = document.createElement("div");
dv.innerHTML = html;
// Handle edge case where innerHTML contains no tags, just text:
if (dv.children.length===0){ o.innerHTML = html; return; }
for (var i = 0; i < dv.children.length; i++) {
var c = dv.children[i];
// n: new node with the same type as c
var n = document.createElement(c.nodeName);
// copy all attributes from c to n
for (var j = 0; j < c.attributes.length; j++)
n.setAttribute(c.attributes[j].nodeName, c.attributes[j].nodeValue);
// If current node is a leaf, just copy the appropriate property (text or innerHTML)
if (c.children.length == 0)
{
switch (c.nodeName)
{
case "SCRIPT":
if (c.text) n.text = c.text;
break;
default:
if (c.innerHTML) n.innerHTML = c.innerHTML;
break;
}
}
// If current node has sub nodes, call itself recursively:
else setHTML(n, c.innerHTML, false);
o.appendChild(n);
}
}
你可以在这里看到演示。
使用$(parent).html(code)代替parent。innerHTML = code。
下面还修复了使用document的脚本。通过SRC属性写入和加载脚本。不幸的是，即使这并不工作与谷歌AdSense脚本。
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
})
}
源
