Why if I put an element before the "p" lines, I don't see the first line yellow? Should p:first-child select the very first p and not just a very first tag?
<style type="text/css">
p:first-child
{
开发者_StackOverflow社区 background:yellow;
}
</style>
<i></i>
<p>I am a strong man. I am a strong man.</p>
<p>I am a strong man. I am a strong man.</p>
<p>I am a strong man. I am a strong man.</p>
:first-child does not care about the type. By adding <i></i> to your code, i becomes the first child (assuming <style> is within <head> and the rest is in <body>, of course). Your selector wants to match p, but since p is not the first child anymore, your style can't be applied.
If you want to filter by type, use the CSS3 :first-of-type pseudo-class:
p:first-of-type
{
background:yellow;
}
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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