I want to implement SVG clip-path for SVG element - html

Question

I want to implement SVG clip-path for SVG element. I have a DIV element in which I want to put SVG element which will act as a clipping mask, and also I have the separate SVG element that has an image to which the clipping mask will be applied.
The first problem I faced with is that clipping mask moves to the left top corner of the viewport but not located inside of the parent DIV element.
The second problem is that I want to make an image on the full screen not depending on the screen size.
Incorrect Mask Circle
Correct Mask Circle (what I want to have)
Do you have suggestions how to make it?
Thanks in advance!
html, body { margin:0; padding:0; overflow:hidden }
svg { position:absolute; top:0; left:0;}
.image-clip-src {
width: 100%;
height: 100%;
}
.svg-wrapper {
width: 72px;
height: 72px;
padding: 2.5em;
border: 1px solid #4D4F51;
margin: 0 auto;
border-radius: 50%;
overflow: hidden;
position: fixed;
top: 55%;
z-index: 9;
left: 64%;
transform: translateY(-50%);
cursor: pointer;
}
.clipped-image image {
clip-path: url(#clipping);
}
<svg class="clipped-image" width="100%" height="100%" viewBox="0 0 1440 960" preserveAspectRatio="xMinYMin meet">
<image class="image-clip-src" xlink:href="https://images.unsplash.com/photo-1526327227970-4bda49fa3489?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=3c4bce33d96df6b18af53fb2dae3363e&auto=format&fit=crop&w=1650&q=80" width="100%" height="100%" overflow="visible"/>
</svg>
<div class="svg-wrapper">
<svg class="svg-defs">
<defs>
<clipPath id="clipping">
<circle r="72" stroke="black" stroke-width="3"/>
</clipPath>
</defs>
</svg>
</div>

Answer 1

That's not the way SVG works.
When you tell something to use a clip path, all it sees is the clip path definition itself. It doesn't know or care about where on the page you have positioned it's parent <svg>.
If you want the clip circle to be at a certain position on the water image, you need to specify its position using cx and cy.
html, body { margin:0; padding:0; overflow:hidden }
svg { position:absolute; top:0; left:0;}
.image-clip-src {
width: 100%;
height: 100%;
}
.clipped-image image {
clip-path: url(#clipping);
}
<svg class="clipped-image" width="100%" height="100%" viewBox="0 0 1440 960" preserveAspectRatio="xMinYMin meet">
<defs>
<clipPath id="clipping">
<circle cx="64%" cy="55%" r="72" stroke="black" stroke-width="3"/>
</clipPath>
</defs>
<image class="image-clip-src" xlink:href="https://images.unsplash.com/photo-1526327227970-4bda49fa3489?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=3c4bce33d96df6b18af53fb2dae3363e&auto=format&fit=crop&w=1650&q=80" width="100%" height="100%" overflow="visible"/>
<circle cx="64%" cy="55%" r="72" fill="none" stroke="#4D4F51" stroke-width="1"/>
</svg>