filter:invert(1) 在速记背景图像 CSS 中去了哪里

Question

我正在使用base：64编写一个带有小图像的简短css按钮。我想在不反转线性渐变背景颜色的情况下反转 base：64 图像。我可以不那么懒惰，只是创建 base：64 图像的反转，但我觉得我可以在 CSS 中更快地做到这一点，但是我不知道在我的 css 速记中将 filter：invert(1( 放在哪里。思潮？

按钮看起来像这样，我只想使用 filter：invert(1( 将图标从黑色反转为白色

https://gyazo.com/13913ed0d5713b5c62892d5f90be7518

:host {
background:url('
data:image/svg+xml;utf8;base64,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
')  no-repeat  center 15% / 35%,  linear-gradient(rgb(32,56,71), rgb(13,135,199)) top left / cover no-repeat;
background-color: rgb(13,135,199); /* Incase Gradient Fails */
border-radius:10px;
}

Answer 1

过滤器适用于整个元素及其所有祖先。
您不能定位此元素的单个部分，也不能仅定位一个background-image。

一种解决方案是将要过滤的背景图像放在伪元素上：

.host {
background: linear-gradient(rgb(32, 56, 71), rgb(13, 135, 199)) top left / cover no-repeat;
background-color: rgb(13, 135, 199);
/* Incase Gradient Fails */
border-radius: 10px;
width: 50vw;
height: 50vw;
position: relative;
}
.host::before {
filter: invert(1);
content: "";
width: 100%;
height: 100%;
left: 0;
right: 0;
position: absolute;
background: url('data:image/svg+xml;base64,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')  no-repeat  center 15% / 35%
}
.host:hover::before {
filter: none;
}

<div class="host"></div>