使用JavaScript的离散标签检查元素是否关闭 [英] Check if an element is closed using a discrete tag with JavaScript
问题描述
我收到了en元素的子节点,我想检查标签是否可以包含文本。例如:
I am getting the child nodes of en element and i want to check if the tags can actually contain text. For example:
<br />, <img />
应该返回false,
<span></span>, <div></div>, <li></li>
应该返回true。谢谢!
should return true. Thanks!
推荐答案
不幸的是,无法检测代码中如何写入代码,因为JavaScript运行时, HTML代码已被解析为DOM对象。
Unfortunately, there is no way to detect how a tag was written in the code, since when the JavaScript runs, the HTML code has already been parsed into DOM objects.
但是,您的问题似乎更多是关于特定元素类型是否可以包含文本。这个简单的测试将给你一个元素类型的答案:
However, your question seems to be more about whether a particular element type can contain text. This simple test will give you an answer per element type:
function canElementContainText(tagname) {
try {
var e = document.createElement(tagname);
return e.outerHTML.indexOf("/") != -1;
} catch (ex) {
return false;
}
}
例如 canElementContainText( div)
返回 true
和 canElementContainText(img)
返回 false
。
然后,您可以将任何元素的 tagName
属性传递给这个函数来测试它。
You can then pass the tagName
property of any element to this function to test it.
var result = canElementContainText(myElement.tagName);
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