javascript 如何通过其内容和 src 删除脚本标签？
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How do I remove a script tag by its content and its src?
提问by ReynierPM
I need to remove a script tag (<script>...</script>) by its content and/or its src property. Taking as example this:
我需要<script>...</script>通过其内容和/或其 src 属性删除脚本标记 ( )。以此为例：
<script type="text/javascript">
var adfly_id = 2776246;
</script>
<script src="https://cdn.adf.ly/js/display.js"></script>
I've tried this code:
我试过这个代码：
jQuery(document).ready(function($){
$('script').each(function() {
if (this.src === 'https://cdn.adf.ly/js/display.js') {
$(this).remove();
}
});
});
But without success (I am using that code from within WP - if anyone is asking why that jQuery syntax), can any give me some advice?
但没有成功（我在 WP 中使用该代码 - 如果有人问为什么使用 jQuery 语法），谁能给我一些建议？
EDIT: The idea here is remove the script to prevent its execution
编辑：这里的想法是删除脚本以防止其执行
回答by lrossy
This seems to work:
这似乎有效：
jQuery(document).ready(function($){
$('script').each(function() {
if (this.src === 'URL_HERE') {
this.parentNode.removeChild( this );
}
});
});
回答by Huang Chen
You can't remove the script tag I believe but I believe you can remove the src attribute in the script tag which render it useless if you removed $(this).attr('src');
我相信你不能删除脚本标签，但我相信你可以删除脚本标签中的 src 属性，如果你删除它就会变得无用 $(this).attr('src');
回答by Meenesh Jain
Try
尝试
$(document).ready(function(){
$('script').each(function() {
var obj = $(this);
if (obj.attr("src") == 'https://cdn.adf.ly/js/display.js') {
obj.attr("src","");
}
});
});
回答by Ismael Harun
You can hack it. Use another script to do a....
你可以破解它。使用另一个脚本来做一个......
node.parentNode.replaceChild(
document.createComment(node.outerHTML.slice(1,-1)
.replace(/--/g, '\-\-')), node);
Where node is your script node/element. The replacing of double dashes is to prevent the browser complaining about an uncompliant comment tag.
其中 node 是您的脚本节点/元素。替换双破折号是为了防止浏览器抱怨评论标签不合规。
Then if you want to enable it just do the reverse comment.replace and enclose with < and >. But you probably need to keep track of the modified script node, because after it becomes a comment it is less query-able.
然后，如果您想启用它，只需执行反向 comment.replace 并用 < 和 > 括起来。但是您可能需要跟踪修改后的脚本节点，因为在它成为注释之后，它的查询能力就变差了。
Just remember that the script is loaded early on, so your removal code should come before the node you want to remove. I had success using and mutation observer that I start in the header that watched for added script nodes and disabled them immediately. Then I analyzed the script node code (both as content and by
请记住，脚本是提前加载的，因此您的删除代码应该在您要删除的节点之前。我成功地使用了变异观察器，我从头开始观察添加的脚本节点并立即禁用它们。然后我分析了脚本节点代码（作为内容和通过
XMLHttpRequest
XMLHttpRequest
-ing the srcif it exists. Then once I had my way with it I would re-enable it by doing the reverse disable operation by creating a code fragment and injecting the original outerHTML, either modified or not.
-ingsrc如果它存在。然后，一旦我掌握了它，我将通过创建代码片段并注入原始代码outerHTML（无论是否修改）来执行反向禁用操作来重新启用它。
