如何更改此SVG的顏色？

Question

我正在嘗試使用CSS更改此SVG圖標的顏色：

<symbol id="meetings">
  <svg viewBox="9 0 33 32" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
      <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" transform="translate(10.000000, 0.000000)">
          <polygon id="Fill-1" points="0.484430769 31.5076923 31.9921231 31.5076923 31.9921231 0 0.484430769 0"></polygon>
          <g id="Group-4" transform="translate(0.000000, 5.907692)">
              <path d="M4.92209231,11.8248862 C4.31409231,11.8248862 2.46006154,10.3154708 2.46006154,6.70390154 C2.46006154,2.47251692 4.8896,0.00704 7.79470769,0.00704 C9.18498462,0.00704 9.83926154,0.0715323077 10.5846154,0.745993846 C12.7123692,0.745993846 14.7702154,2.32433231 14.7702154,6.70390154 C14.7702154,10.2869169 12.9353846,11.8248862 12.3081846,11.8248862 C12.0900923,11.8248862 11.9241846,11.6338708 11.6795077,11.3847631 C11.4304,11.6328862 11.1547077,11.8539323 10.8583385,12.0439631 C10.9883077,13.9743015 11.7257846,14.7536246 13.8594462,15.5452554 C16.0896,16.3728246 17.1037538,16.9429169 17.2332308,19.1730708 C17.2494769,19.4477785 17.0402462,19.6831015 16.7655385,19.6993477 C16.7566769,19.69984 16.7483077,19.69984 16.7394462,19.69984 L0.494769231,19.69984 C0.219569231,19.6983631 -0.00147692308,19.4738708 2.03980422e-13,19.1991631 C2.03980422e-13,19.1903015 0.000492307693,19.1819323 0.000984615385,19.1730708 C0.130953846,16.9429169 1.14461538,16.3728246 3.37526154,15.5452554 C5.50793846,14.7541169 6.24541538,13.9747938 6.37538462,12.0464246 C6.07606154,11.8549169 5.79790769,11.6319015 5.54633846,11.3808246 C5.29969231,11.6314092 5.13476923,11.8248862 4.92209231,11.8248862 M31.0129231,19.69984 L18.6973538,19.6983631 C18.4369231,19.6993477 18.2212923,19.4960246 18.2070154,19.2355938 C18.2178462,18.26624 17.9244308,17.3180554 17.3671385,16.5244554 C17.1515077,16.2615631 17.1899077,15.8736246 17.4532923,15.6579938 C17.5035077,15.61664 17.5606154,15.5831631 17.6216615,15.5600246 L17.6605538,15.5452554 C19.7971692,14.7516554 20.5326769,13.9703631 20.6596923,12.0301785 C20.2904615,11.7933785 19.9571692,11.5053785 19.6696615,11.1745477 C19.1537231,10.5055015 18.8292923,9.70944 18.7308308,8.87054769 C18.7067077,8.87300923 18.6825846,8.87497846 18.6589538,8.87497846 C18.1243077,8.87497846 17.7196308,7.74759385 17.7196308,6.95497846 C17.7196308,6.16236308 17.9943385,5.92113231 18.2562462,5.92113231 C18.3108923,5.92113231 18.3616,5.92408615 18.4108308,5.92802462 C18.2872615,5.43030154 18.2217846,4.92027077 18.2153846,4.40777846 C18.2153846,2.48580923 18.7544615,1.15559385 20.4007385,0.918793846 C21.312,0.286670769 22.6894769,0.00753230769 24.4494769,0.00753230769 C25.5748923,0.00753230769 24.6370462,0.777501538 25.6950154,1.00248615 C26.3497846,1.14180923 27.5687385,1.60556308 27.5687385,4.40777846 C27.5623385,4.92027077 27.4968615,5.43030154 27.3732923,5.92802462 C27.4220308,5.92408615 27.4732308,5.92113231 27.5278769,5.92113231 C27.7902769,5.92113231 28.0644923,6.16236308 28.0644923,6.95497846 C28.0644923,7.74759385 27.6603077,8.87497846 27.1256615,8.87497846 C27.1015385,8.87497846 27.0774154,8.87300923 27.0532923,8.87054769 C26.9548308,9.70944 26.6304,10.5055015 26.1144615,11.1745477 C25.8299077,11.5019323 25.5005538,11.7874708 25.1357538,12.0227938 C25.2612923,13.9688862 25.9958154,14.7511631 28.1353846,15.5452554 C30.3635692,16.3728246 31.3767385,16.9429169 31.5062154,19.1730708 C31.5224615,19.4472862 31.3137231,19.6831015 31.0395077,19.6993477 C31.0306462,19.69984 31.0217846,19.69984 31.0129231,19.69984" id="Fill-2"></path>
          </g>
      </g>
  </svg>

我在HTML中使用這個SVG，如下所示：

<svg class="active" width="32px" height="32px">
    <use xlink:href="#meetings"/></use>
</svg>

這是CSS（使用SASS）：

.foot__icon svg.active {
  fill: #ffffff !important;

  path, g, #Group-4 {
    fill: #ffffff !important;
  }
}

這不起作用，我無法弄清楚原因。 當我嘗試從g標簽中刪除填充聲明（ fill="#03A9F4" ）時，SVG完全消失。

活動類甚至出現在開發工具中，但顏色沒有顯示為白色

更新：這似乎是<use>標記的問題。 如果我將類直接放在SVG上，那么它按預期工作。 仍然不確定這里發生了什么。

Answer 1

當您通過<use>引用某些內容時，引用的元素不會突然成為<use>元素下“DOM”的一部分。 換句話說，DOM仍然是這樣的

<symbol id="meetings">
   <path>
<svg class="active">
   <use>

不

<svg class="active">
   <use>
      <symbol id="meetings">
         <path>

所以像svg.active path這樣的CSS規則不起作用。

符號應該是元素的靜態副本，或者是重用的元素集。 如果要對它們進行樣式設置，則應設置原始符號的樣式。 例如：

#Group-4 {
  fill: #ffffff;
}

如果要動態設置符號樣式，則可以使用一種有限的解決方案。 名為currentColor SVG顏色有一個特殊的關鍵字值，它允許您使用填充或描邊的當前color值。

這個“技巧”允許我們將單一顏色傳遞給符號。 在下面的示例中，我使用它來為符號中的路徑着色。

 #Group-4 { fill: currentColor; } svg.active { color: red; } svg.inactive { color: lightgrey; } 

 <svg width="0" height="0"> <symbol id="meetings" viewBox="9 0 33 32"> <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" transform="translate(10.000000, 0.000000)"> <polygon id="Fill-1" points="0.484430769 31.5076923 31.9921231 31.5076923 31.9921231 0 0.484430769 0"></polygon> <g id="Group-4" transform="translate(0.000000, 5.907692)"> <path d="M4.92209231,11.8248862 C4.31409231,11.8248862 2.46006154,10.3154708 2.46006154,6.70390154 C2.46006154,2.47251692 4.8896,0.00704 7.79470769,0.00704 C9.18498462,0.00704 9.83926154,0.0715323077 10.5846154,0.745993846 C12.7123692,0.745993846 14.7702154,2.32433231 14.7702154,6.70390154 C14.7702154,10.2869169 12.9353846,11.8248862 12.3081846,11.8248862 C12.0900923,11.8248862 11.9241846,11.6338708 11.6795077,11.3847631 C11.4304,11.6328862 11.1547077,11.8539323 10.8583385,12.0439631 C10.9883077,13.9743015 11.7257846,14.7536246 13.8594462,15.5452554 C16.0896,16.3728246 17.1037538,16.9429169 17.2332308,19.1730708 C17.2494769,19.4477785 17.0402462,19.6831015 16.7655385,19.6993477 C16.7566769,19.69984 16.7483077,19.69984 16.7394462,19.69984 L0.494769231,19.69984 C0.219569231,19.6983631 -0.00147692308,19.4738708 2.03980422e-13,19.1991631 C2.03980422e-13,19.1903015 0.000492307693,19.1819323 0.000984615385,19.1730708 C0.130953846,16.9429169 1.14461538,16.3728246 3.37526154,15.5452554 C5.50793846,14.7541169 6.24541538,13.9747938 6.37538462,12.0464246 C6.07606154,11.8549169 5.79790769,11.6319015 5.54633846,11.3808246 C5.29969231,11.6314092 5.13476923,11.8248862 4.92209231,11.8248862 M31.0129231,19.69984 L18.6973538,19.6983631 C18.4369231,19.6993477 18.2212923,19.4960246 18.2070154,19.2355938 C18.2178462,18.26624 17.9244308,17.3180554 17.3671385,16.5244554 C17.1515077,16.2615631 17.1899077,15.8736246 17.4532923,15.6579938 C17.5035077,15.61664 17.5606154,15.5831631 17.6216615,15.5600246 L17.6605538,15.5452554 C19.7971692,14.7516554 20.5326769,13.9703631 20.6596923,12.0301785 C20.2904615,11.7933785 19.9571692,11.5053785 19.6696615,11.1745477 C19.1537231,10.5055015 18.8292923,9.70944 18.7308308,8.87054769 C18.7067077,8.87300923 18.6825846,8.87497846 18.6589538,8.87497846 C18.1243077,8.87497846 17.7196308,7.74759385 17.7196308,6.95497846 C17.7196308,6.16236308 17.9943385,5.92113231 18.2562462,5.92113231 C18.3108923,5.92113231 18.3616,5.92408615 18.4108308,5.92802462 C18.2872615,5.43030154 18.2217846,4.92027077 18.2153846,4.40777846 C18.2153846,2.48580923 18.7544615,1.15559385 20.4007385,0.918793846 C21.312,0.286670769 22.6894769,0.00753230769 24.4494769,0.00753230769 C25.5748923,0.00753230769 24.6370462,0.777501538 25.6950154,1.00248615 C26.3497846,1.14180923 27.5687385,1.60556308 27.5687385,4.40777846 C27.5623385,4.92027077 27.4968615,5.43030154 27.3732923,5.92802462 C27.4220308,5.92408615 27.4732308,5.92113231 27.5278769,5.92113231 C27.7902769,5.92113231 28.0644923,6.16236308 28.0644923,6.95497846 C28.0644923,7.74759385 27.6603077,8.87497846 27.1256615,8.87497846 C27.1015385,8.87497846 27.0774154,8.87300923 27.0532923,8.87054769 C26.9548308,9.70944 26.6304,10.5055015 26.1144615,11.1745477 C25.8299077,11.5019323 25.5005538,11.7874708 25.1357538,12.0227938 C25.2612923,13.9688862 25.9958154,14.7511631 28.1353846,15.5452554 C30.3635692,16.3728246 31.3767385,16.9429169 31.5062154,19.1730708 C31.5224615,19.4472862 31.3137231,19.6831015 31.0395077,19.6993477 C31.0306462,19.69984 31.0217846,19.69984 31.0129231,19.69984" id="Fill-2"></path> </g> </g> </symbol> </svg> <svg class="active" width="32px" height="32px"> <use xlink:href="#meetings"/> </svg> <svg class="inactive" width="32px" height="32px"> <use xlink:href="#meetings"/> </svg> 

所以我們設置符號的路徑來fill: currentColor ，然后將svg.active color設置為紅色。 紅色傳遞到符號並用於路徑。

並且為了證明它是動態的，我添加了另一個對符號的引用，類“不活動”，並使其成為不同的顏色。