css - Show hidden rect with text on hover of another poly -


i need use pure svg project. know how effect divs dont know how make work svg, dont know im doing wrong.

i want show hidden black rect white text when hover on polygon (and polygon 0.1 of opacity normal , changes 0.8 of opacity on same hover) tooltip opacity , nice smooth transition, pure svg.

.showme {      opacity: 0.3;  }    .showme:hover {      opacity: 0.8;      }    .desc {      visibility: hidden;  }    .showme:hover + .desc {     visibility: visible;  }
<svg width="200" height="200" viewbox="0 0 1000 300"       xmlns="http://www.w3.org/2000/svg" version="1.1" >      <rect x="1" y="1" width="998" height="298" fill="blue" class="showme"/>      </svg>    <svg width="200" height="200" viewbox="0 0 1000 300"       xmlns="http://www.w3.org/2000/svg" version="1.1" class="desc" >    <rect x="1" y="1" width="998" height="298" fill="black" />        <text x="250" y="150" font-family="verdana" font-size="55" fill="white">hello world!</text>  </svg>

please :/

thanks.

keeping svg, can this, you'll need slight changes:

<svg  width="200" height="200" viewbox="0 0 1000 300"      xmlns="http://www.w3.org/2000/svg" version="1.1" >     <rect onmouseover='document.getelementbyid("desc").style.visibility = "visible"' onmouseout='document.getelementbyid("desc").style.visibility = "hidden"' x="1" y="1" width="998" height="298" fill="blue" class="showme"/>     </svg>  <svg width="200" height="200" viewbox="0 0 1000 300"      xmlns="http://www.w3.org/2000/svg" version="1.1" id="desc" >   <rect x="1" y="1" width="998" height="298" fill="black" />       <text x="250" y="150" font-family="verdana" font-size="55" fill="white">hello world!</text> </svg>

https://jsfiddle.net/q6kkhvz7/2/


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