Text-decoration is a great way to emphasize text on a webpage. I use the CSS property often for headings or elements that receive focus, such as buttons or anchor tags.

Text-decoration

See what I did there? Pretty neat.

Text-decoration is shorthand for the following properties:

text-decoration-color: sets the color of the decoration, otherwise the color of the text is inherited
text-decoration-line: sets the type of decoration that is used; the options are: underline, overline, and line-through
text-decoration-style: sets the style of the line that is used for the decoration such as solid, double,wavy, dashed, or dotted
text-decoration-thickness: sets the thickness of the line used for the decoration

You can use text-decoration with a single property: text-decoration: underline;

Or with multiple properties on the same line: text-decoration: underline solid #444 5px;

Here is the styling I used on this website to style headings within blog posts:

    .prose h3 {
        text-decoration: underline wavy #ffb847 2px;
        text-underline-offset: 8px;
    }

Text-underline-offset

Sometimes, the text-decoration line is obstructed with letters. You can use the property text-underline-offset to move the line up or down:

In the following image, the property is used to move the line down slightly:

Keep in mind this must be declared outside of text-decoration because it's styling the line itself and is not a text-decoration property

Conclusion

Along with text-shadow, border, and color, text-decoration is an excellent way to bring attention to various elements of your website. I created a CodePen to demonstrate a few of the different ways we can use this property:

Here is a link to the pen: codepen: text-decoration

Resources:

MDN docs: text-decoration

WCAG 2.1 - Using visual cues to convey information