How can I ensure responsive alignment of clip-paths when using inline SVG?

Responsive Clip-Path with Inline SVG

When applying a clip-path to an element with a background, it's common to embed the SVG inline. However, you may encounter issues with responsiveness or alignment as seen in the example below:

<code class="html"><header id="block-header">
  <svg width="100%" height="100%" viewBox="0 0 4000 1696" preserveAspectRatio="none">
    <defs>
      <clipPath id="myClip">
        <path d="M0 1568.18V0h4000v1568.18S3206.25 1696 2000 1696C984.37 1696 0 1568.18 0 1568.18z" />
      </clipPath>
    </defs>
  </svg>
</header></code>

The Issue

In this example, the inline SVG has explicit dimensions (4000px wide), which may be much larger than the actual size of the header. Consequently, the clip-path becomes disproportionately large, leading to an unexpected alignment.

The Solution: clipPathUnits="objectBoundingBox"

To create a responsive clip-path, you can use the clipPathUnits="objectBoundingBox" attribute:

<code class="html"><svg width="0" height="0">
  <defs>
    <clipPath id="myClip" clipPathUnits="objectBoundingBox">
      <path d="M0,0 1,0 1,0.9 C 1,0.9, 0.77,1, 0.5,1 0.23,1, 0,0.9,0,0.9z" />
    </clipPath>
  </defs>
</svg></code>

With this attribute, the viewBox and dimensions of the SVG are irrelevant, and the clip path instead scales to the bounding box of the element to which it is applied. This ensures a responsive and consistent alignment of the clip-path, regardless of the element's size.

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