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Move Svg Group On Path Trail Based On Percentage Of Whole Path Trail

I am trying to find a way to move an group (id='avatar') inside an SVG with jQuery based on an percentage of the whole trail of an path element (id='path' > path), inside the SV

Solution 1:

In order to get the position of a point on a path you need to use path.getPointAtLength.

Here is what I've done:

I've moved the avatar in a <defs> element so that I can use it latter. Also I've translated everything in the avatar in the origin of the svg canvas. The <use> elements can get an x and a y attributes in order to be able to position the used element on the svg canvas. In Javascript I'm calculating the x and y for the avatar using the path.getPointAtLength method.

In this demo an input type range changes the position of the avatar on the path;

In your code you have a transform attribute for the avatar. I'm using this transform for the use element.

Also: for the demo I've changed the value of the viewBox attribute of your svg element. You may change it back at what you want.

let pathlength = path.getTotalLength();
let pos = path.getPointAtLength(0);


theUse.setAttributeNS(null,"x", pos.x);
theUse.setAttributeNS(null,"y", pos.y);


theRange.addEventListener("input", ()=>{
  let perc = parseInt(theRange.value);
  let leng = pathlength * perc/100;
  pos = path.getPointAtLength(leng);
  theUse.setAttributeNS(null,"x", pos.x);
  theUse.setAttributeNS(null,"y", pos.y);
})
svg{border:1px solid;overflow:visible; width:95vh; display:block; margin:1em auto;}
<inputtype="range"id="theRange"value="0"/><svgversion="1.1"xmlns="http://www.w3.org/2000/svg"xmlns:xlink="http://www.w3.org/1999/xlink"x="0px"y="0px"viewBox="230 200 400 300"xml:space="preserve"><styletype="text/css">.st5{fill:#43A592;stroke:#8C6239;stroke-width:0.5;stroke-miterlimit:10;}
    .st6{fill:none;stroke:#603813;stroke-width:8;stroke-linecap:square;stroke-miterlimit:10;}
    .st7{fill:none;stroke:#603813;stroke-width:8;stroke-linecap:square;stroke-miterlimit:10;stroke-dasharray:5.0414,12.0993;}
    .st8{fill:#405813;}
    .st9{fill:#7FBFD6;}
</style><defs><gid="avatar"transform="translate(-276.22, -290.06)"><g><g><circleclass="st9"cx="276.22"cy="290.06"r="26.83"/><pathclass="st8"d="M276.22,317.69c-15.23,0-27.62-12.39-27.62-27.62s12.39-27.62,27.62-27.62s27.62,12.39,27.62,27.62
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