Modify the appearance of a different element in a CSS file

Can the style of another object be updated from a stylesheet? For instance, can you display h1 when hovering over a, as shown in the following example:

a:hover { set h1:display:block; }

h1 { display: none; }

Would this be achievable using CSS?

Answer №1

To customize the appearance of an element based on the "state" of a preceding element (where "state" refers to an attribute, value, element, class, or ID), you can use + and ~ selectors. The element in question must be a parent or previous sibling of a parent (not a descendant of the latter).

    h1 > span ~ a { /* will style a, not h1 */ }

    a:hover + h1 { /* will style h1 if it is the next sibling of the hovered element a.
                      It's recommended to enclose inline elements like a within a block-level element like p, as HTML5 allows links around block elements */ }

If your desired outcome involves manipulating CSS3 :target, you can refer to the demonstrations on under the :target section (note that this won't be triggered by :hover anymore).

Remember to ensure consistent behavior for :focus as well as :hover to accommodate non-mouse users (such as those using keyboards or other devices). Also, include :active to address bugs in some Internet Explorer versions.

Answer №2

When placing the h1 within the a tags, you can style it using this method:

h1 {display:none;}
a:hover h1 {display:block;}

If the h1 directly follows the a, you can implement this style:

h1 {display:none}
a:hover + h1 {display:block;}

If neither of these options work, Javascript may be necessary.

Answer №3

Unfortunately, achieving this effect is not possible unless the h1 is a child of a. You can try using the + siblings selector for siblings (see demo here), but beyond that, it can't be done. For example,

/* Display <h1> inside <a> on hover */
a:hover h1 {
    display: block;
}

/* Display <h1> next to <a> when hovered */
a:hover + h1 {
    display: block;
}

Your alternative option is to use JavaScript. If you are already using a library like jQuery or Mootools, it's simple. But even with vanilla JavaScript, the task is not too complex.

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