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CSS

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It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

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HTML 

              
                <div class="svg-container">
  <div class="svg-1">
  <svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 1082.1 1785.3" style="enable-background:new 0 0 1082.1 1785.3;" xml:space="preserve">
  <style type="text/css">
    .st0{fill-rule:evenodd;clip-rule:evenodd;fill:indianred;}
  </style>
  <g>
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<style type="text/css">
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</g>
</svg>
</div>
</div>

<div class="ui center aligned container">
  <div class="ui teal button onion">Toggle onion skin</div>
</div>
!

CSS 

              
                body {
  background: Gainsboro;
}
.svg-container {
  height: 310px;
  [class*=svg-] {
    display: inline-block;
    position: absolute;
    // transitioning all, as we're catching 
    // 2 transitions here
    transition: all ease-out 0.3s;
    height: 286px;
    width: 173px;
    &:nth-child(odd) {
      // positioning is placement - half 
      // the width of your target
      left: calc(60% - 86px);
      @media (max-width: 500px) {
        left: 10px;
      }   
    }
    &:nth-child(even) {
      left: calc(40% - 86px);
      @media (max-width: 500px) {
        left: calc(95% - 173px);
      }       
    }
    &.svg-onion {
      left: calc(50% - 86px);
       svg {
        // nested here to only affect opacity
        // when .svg-onion is added
        fill-opacity: .6;
      }     
    }
  }
}
!

JS 

              
                $('.onion')
.on(
  'click',
  function() {
    $('[class*=svg-]').toggleClass('svg-onion');
  }
);
!
999px

Console