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SVG прелоадеры

Анимированные SVG иконки прелоадеров отлично впишутся в дизайн сайте. Чем, что то описывать лучше один раз увидеть. Ну, а ниже сам код:
HTML

<h1>SVG Loading Images</h1>

<!-- 1 -->
<div class="loader loader--style1" title="0">
  <svg version="1.1" id="loader-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
   width="40px" height="40px" viewBox="0 0 40 40" enable-background="new 0 0 40 40" xml:space="preserve">
  <path opacity="0.2" fill="#000" d="M20.201,5.169c-8.254,0-14.946,6.692-14.946,14.946c0,8.255,6.692,14.946,14.946,14.946
    s14.946-6.691,14.946-14.946C35.146,11.861,28.455,5.169,20.201,5.169z M20.201,31.749c-6.425,0-11.634-5.208-11.634-11.634
    c0-6.425,5.209-11.634,11.634-11.634c6.425,0,11.633,5.209,11.633,11.634C31.834,26.541,26.626,31.749,20.201,31.749z"/>
  <path fill="#000" d="M26.013,10.047l1.654-2.866c-2.198-1.272-4.743-2.012-7.466-2.012h0v3.312h0
    C22.32,8.481,24.301,9.057,26.013,10.047z">
    <animateTransform attributeType="xml"
      attributeName="transform"
      type="rotate"
      from="0 20 20"
      to="360 20 20"
      dur="0.5s"
      repeatCount="indefinite"/>
    </path>
  </svg>
</div>

<!-- 2 -->
<div class="loader loader--style2" title="1">
  <svg version="1.1" id="loader-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
     width="40px" height="40px" viewBox="0 0 50 50" style="enable-background:new 0 0 50 50;" xml:space="preserve">
  <path fill="#000" d="M25.251,6.461c-10.318,0-18.683,8.365-18.683,18.683h4.068c0-8.071,6.543-14.615,14.615-14.615V6.461z">
    <animateTransform attributeType="xml"
      attributeName="transform"
      type="rotate"
      from="0 25 25"
      to="360 25 25"
      dur="0.6s"
      repeatCount="indefinite"/>
    </path>
  </svg>
</div>

<!-- 3  -->
<div class="loader loader--style3" title="2">
  <svg version="1.1" id="loader-1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
     width="40px" height="40px" viewBox="0 0 50 50" style="enable-background:new 0 0 50 50;" xml:space="preserve">
  <path fill="#000" d="M43.935,25.145c0-10.318-8.364-18.683-18.683-18.683c-10.318,0-18.683,8.365-18.683,18.683h4.068c0-8.071,6.543-14.615,14.615-14.615c8.072,0,14.615,6.543,14.615,14.615H43.935z">
    <animateTransform attributeType="xml"
      attributeName="transform"
      type="rotate"
      from="0 25 25"
      to="360 25 25"
      dur="0.6s"
      repeatCount="indefinite"/>
    </path>
  </svg>
</div>

<!-- 4 -->
<div class="loader loader--style4" title="3">
  <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"
     width="24px" height="24px" viewBox="0 0 24 24" style="enable-background:new 0 0 50 50;" xml:space="preserve">
    <rect x="0" y="0" width="4" height="7" fill="#333">
      <animateTransform  attributeType="xml"
        attributeName="transform" type="scale"
        values="1,1; 1,3; 1,1"
        begin="0s" dur="0.6s" repeatCount="indefinite" />       
    </rect>

    <rect x="10" y="0" width="4" height="7" fill="#333">
      <animateTransform  attributeType="xml"
        attributeName="transform" type="scale"
        values="1,1; 1,3; 1,1"
        begin="0.2s" dur="0.6s" repeatCount="indefinite" />       
    </rect>
    <rect x="20" y="0" width="4" height="7" fill="#333">
      <animateTransform  attributeType="xml"
        attributeName="transform" type="scale"
        values="1,1; 1,3; 1,1"
        begin="0.4s" dur="0.6s" repeatCount="indefinite" />       
    </rect>
  </svg>
</div>

<!-- 5 -->
<div class="loader loader--style5" title="4">
  <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"
     width="24px" height="30px" viewBox="0 0 24 30" style="enable-background:new 0 0 50 50;" xml:space="preserve">
    <rect x="0" y="0" width="4" height="10" fill="#333">
      <animateTransform attributeType="xml"
        attributeName="transform" type="translate"
        values="0 0; 0 20; 0 0"
        begin="0" dur="0.6s" repeatCount="indefinite" />
    </rect>
    <rect x="10" y="0" width="4" height="10" fill="#333">
      <animateTransform attributeType="xml"
        attributeName="transform" type="translate"
        values="0 0; 0 20; 0 0"
        begin="0.2s" dur="0.6s" repeatCount="indefinite" />
    </rect>
    <rect x="20" y="0" width="4" height="10" fill="#333">
      <animateTransform attributeType="xml"
        attributeName="transform" type="translate"
        values="0 0; 0 20; 0 0"
        begin="0.4s" dur="0.6s" repeatCount="indefinite" />
    </rect>
  </svg>
</div>

<!-- 6 -->
<div class="loader loader--style6" title="5">
  <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"
     width="24px" height="30px" viewBox="0 0 24 30" style="enable-background:new 0 0 50 50;" xml:space="preserve">
    <rect x="0" y="13" width="4" height="5" fill="#333">
      <animate attributeName="height" attributeType="XML"
        values="5;21;5" 
        begin="0s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="y" attributeType="XML"
        values="13; 5; 13"
        begin="0s" dur="0.6s" repeatCount="indefinite" />
    </rect>
    <rect x="10" y="13" width="4" height="5" fill="#333">
      <animate attributeName="height" attributeType="XML"
        values="5;21;5" 
        begin="0.15s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="y" attributeType="XML"
        values="13; 5; 13"
        begin="0.15s" dur="0.6s" repeatCount="indefinite" />
    </rect>
    <rect x="20" y="13" width="4" height="5" fill="#333">
      <animate attributeName="height" attributeType="XML"
        values="5;21;5" 
        begin="0.3s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="y" attributeType="XML"
        values="13; 5; 13"
        begin="0.3s" dur="0.6s" repeatCount="indefinite" />
    </rect>
  </svg>
</div>

<!-- 7 -->
<div class="loader loader--style7" title="6">
  <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"
     width="24px" height="30px" viewBox="0 0 24 30" style="enable-background:new 0 0 50 50;" xml:space="preserve">
    <rect x="0" y="0" width="4" height="20" fill="#333">
      <animate attributeName="opacity" attributeType="XML"
        values="1; .2; 1" 
        begin="0s" dur="0.6s" repeatCount="indefinite" />
    </rect>
    <rect x="7" y="0" width="4" height="20" fill="#333">
      <animate attributeName="opacity" attributeType="XML"
        values="1; .2; 1" 
        begin="0.2s" dur="0.6s" repeatCount="indefinite" />
    </rect>
    <rect x="14" y="0" width="4" height="20" fill="#333">
      <animate attributeName="opacity" attributeType="XML"
        values="1; .2; 1" 
        begin="0.4s" dur="0.6s" repeatCount="indefinite" />
    </rect>
  </svg>
</div>

<!-- 8 -->
<div class="loader loader--style8" title="7">
  <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"
     width="24px" height="30px" viewBox="0 0 24 30" style="enable-background:new 0 0 50 50;" xml:space="preserve">
    <rect x="0" y="10" width="4" height="10" fill="#333" opacity="0.2">
      <animate attributeName="opacity" attributeType="XML" values="0.2; 1; .2" begin="0s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="height" attributeType="XML" values="10; 20; 10" begin="0s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="y" attributeType="XML" values="10; 5; 10" begin="0s" dur="0.6s" repeatCount="indefinite" />
    </rect>
    <rect x="8" y="10" width="4" height="10" fill="#333"  opacity="0.2">
      <animate attributeName="opacity" attributeType="XML" values="0.2; 1; .2" begin="0.15s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="height" attributeType="XML" values="10; 20; 10" begin="0.15s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="y" attributeType="XML" values="10; 5; 10" begin="0.15s" dur="0.6s" repeatCount="indefinite" />
    </rect>
    <rect x="16" y="10" width="4" height="10" fill="#333"  opacity="0.2">
      <animate attributeName="opacity" attributeType="XML" values="0.2; 1; .2" begin="0.3s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="height" attributeType="XML" values="10; 20; 10" begin="0.3s" dur="0.6s" repeatCount="indefinite" />
      <animate attributeName="y" attributeType="XML" values="10; 5; 10" begin="0.3s" dur="0.6s" repeatCount="indefinite" />
    </rect>
  </svg>
</div>

CSS

body{
  padding: 1em;
  background: #2B3134;
  color: #777;
  text-align: center;
  font-family: "Gill sans", sans-serif;
  width: 80%;
  margin: 0 auto;
}
h1{
  margin: 1em 0;
  border-bottom: 1px dashed;
  padding-bottom: 1em;
  font-weight: lighter;
}
p{
  font-style: italic;
}
.loader{
  margin: 0 0 2em;
  height: 100px;
  width: 20%;
  text-align: center;
  padding: 1em;
  margin: 0 auto 1em;
  display: inline-block;
  vertical-align: top;
}

/*
  Set the color of the icon
*/
svg path,
svg rect{
  fill: #FF6700;
}

Источник - https://codepen.io/aurer/pen/jEGbA.