css underline removal

In web design, underline is a decorative line commonly used to add style to hyperlinks. However, in some cases we may need to remove the underline from a hyperlink. In css, there are several ways to make a hyperlink without underline.

1. text-decoration attribute

In css, the text-decoration attribute can be used to control the decorative lines of text. By setting text-decoration:none, the underline of the hyperlink can be removed.

For example, the following code can remove the underline from all hyperlinks:

a { text-decoration: none; }

2. border-bottom attribute

Another method is to use border -bottom attribute to simulate underlines. Underlines can be removed by setting border-bottom:none.

For example, the following code can remove the underline from all hyperlinks and add a 1-pixel bottom border using the border-bottom attribute:

a { text-decoration: none; border-bottom: 1px solid #000; }

3. background-image attribute

We can also use the background-image attribute to remove underlines. The underline can be removed by setting the hyperlink background image to a blank pixel. This method can also be used to add a custom underline.

For example, the following code can remove the underline of all hyperlinks and set the underline to a 1-pixel-high, blue line:

a { text-decoration: none; background-image: url("data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs="); background-repeat: repeat-x; background-position: bottom; background-color: blue; height: 1px; }

4. :after selector

Finally, we can also use the :after selector to add an underline. This method can add a pseudo element to the hyperlink and add a style to the element to achieve the underline effect.

For example, the following code can remove the underline of all hyperlinks and add a 1-pixel-high, black underline using the :after selector:

a { text-decoration: none; position: relative; } a:after { content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px; background-color: black; }

To summarize, by setting text- With decoration:none, border-bottom:none, background-image and other methods, we can remove the underline of a hyperlink or add a custom underline. Using the :after selector allows us to control the underline style more flexibly. In practical applications, we can choose the most suitable method to remove underlines according to the specific situation.

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