Can I embed <PRE> tag into <P> tag?
Question
why are there two elements of <p> when i use only one <p> tag?
if <center> tag is instead of <pre> ,the result is the same.
if <b> tag is instead of <pre> ,the result of a.length is 1.
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<p><pre>name: id:</pre></p>
<script>
a = document.getElementsByTagName("p");
document.write("LEN:"+a.length+"<BR>");
for(i=0;i<a.length;i++){
document.write(a[i].innerHTML+"<BR>");
}
</script>
1 answers
solution1
1 ACCPTED 2020-03-03 05:11:21
<pre> cannot be inside <p> . Thus, when the HTML parser encounters <pre> inside <p> , it will close <p> first. Then it encounters </p> , a closing tag without an opening tag, and assumes you wanted <p> . The resulting structure is:
<p></p>
<pre>...</pre>
<p></p>
How do you know <pre> cannot be inside <p> ? See <p> on MDN , or even better in HTML spec , and notice "Permitted content: Phrasing content". Looking at what "phrasing content" is, you can see that it does not include <pre> .
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