The div has a margin on the ul element, creating some space between the two

Can anyone help me understand why the URL is appearing with margin to the right of the div?

https://i.sstatic.net/ECtDV.jpg

Here is my code:

#banner {

    height:30px;
    width: 750px;
    margin: 0 auto;
    background-color: aquamarine;
}
#banner ul{

    list-style: none;
    height:30px;
}

#banner ul li {

    float: left;
}
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8>
    <title>title</title>
    <link rel='stylesheet' href='styles/index.css' type='text/css'/>
  </head>
  <body>
  <div id='banner'>
    <ul >
      <li>Home</li>
      <li>link</li>
      <li>product</li>
      <li>phone</li>
      <li>cat</li>
      <li>about</li>
    </ul>
  </div>
  </body>
</html>

I'm facing two questions, can someone provide explanations for these issues?

Answer №1

Here is what you can observe:

https://i.sstatic.net/yzx92.png

This represents the box model visually, Safari has this feature in the style inspector. Personally, I prefer Chrome for viewing CSS details as it is more organized.

Answer №2

According to Toby, the orange indicates the margin around your element, while the green represents the padding.

These default styles are added by browsers to HTML elements. For example, a <h1> will display larger than a <h2> even without any custom styling because of these default browser settings.

Just like with heading tags, browsers also apply default margins and paddings to various other elements. In the case of unordered lists, you may notice some top and bottom margin and left padding added by the browser.

To override these defaults, you can add your own styles in the same location as your existing styles for that particular element:

#banner ul{
  list-style: none;
  height:30px;
  margin: 0; // removes default margin
  padding: 0; // removes default padding
}

If you wish to completely reset all default styles provided by the browser, you could use a CSS reset like the one created by Eric Meyer at . However, this may not always be necessary, as it might require re-adding certain styles that you actually want, such as list styles for ordered lists.

Answer №3

Orange color: The 30px set in the #banner ul style

Margin: This is the default ul padding. To remove it, modify to:

#banner ul{
    list-style: none;
    height: 30px;
    padding-left: 0px;
}

Answer №4

The default padding is shown in green. To eliminate this, you can include padding:0; within the #banner ul section.

Your updated code could look something like this:

#banner ul{
    padding: 0;
    list-style: none;
    height:30px;
}

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