How Can I Create a Responsive CSS Triangle with a Percentage-Based Width?

Responsive CSS Triangle with Percentage-Based Width

In CSS, we can create a triangle using borders by setting different widths for the top and bottom borders. However, when using percentages for the link width, the arrow's size cannot be adjusted dynamically based on the link's content.

Solution: Percentage-Based Triangle

To create a responsive triangle that adapts its size to the link's content, we can use a pseudo element with a skewed and rotated transformation:

.btn {
  ...
  padding-bottom: 15%;
  ...
}

.btn:after {
  content: "";
  ...
  padding-bottom: 50%;
  ...
  transform: rotate(-30deg) skewX(30deg);
}

Explanation:

• The pseudo element is positioned absolutely and its background color is inherited from the link.
• The padding-bottom property (15% in this example) sets the triangle's height as a percentage of the link's width.
• Skewing and rotating the triangle creates the desired shape.
• The negative z-index ensures that the triangle is behind the link's content.

Benefits:

• The triangle's size is automatically adjusted based on the link's width.
• The aspect ratio of the triangle is maintained.

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