Responsive clip-path with inline SVG

Question

On an element with a background (image or solid color don\'t really matter):

I am trying

Answer 1

References to SVG clip paths are to the clip path definitions themselves and the dimensions or other attributes of the <svg> are meaningless in this context.

What is happening in your example is that you are applying a 4000 px wide clip path to your header. Which is probably only of the order of 900 px wide. So the curvature isn't visible.

If you want a responsive clip path, you should define it using clipPathUnits="objectBoundingBox".

#block-header {
    background: Red;
    min-height: 100px;
    -webkit-clip-path: url(#myClip);
	clip-path: url(#myClip);
}

<h1>SVG image</h1>
<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100" viewBox="0 0 1 1" preserveAspectRatio="none"><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"/></svg>

<h1><code>clip-path</code> using the same SVG</h1>
<header id="block-header">
    <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>
</header>    

Fiddle here