如何改变纯css动画的前面颜色？

Question

在下面的纯CSS加载中，前面的颜色是白色的，所以它不会在白色屏幕上显示任何内容。如何改变前面的颜色？

​

.lds-hourglass {
  display: inline-block;
  position: relative;
  width: 120px;
  height: 120px;
  background-color: black;
}

.lds-hourglass:after {
  content: " ";
  display: block;
  border-radius: 50%;
  width: 0;
  height: 0;
  margin: 8px;
  box-sizing: border-box;
  border: 32px solid #fff;
  border-color: #fff transparent #fff transparent;
  animation: lds-hourglass 1.2s infinite;
}

@keyframes lds-hourglass {
  0% {
    transform: rotate(0);
    animation-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
  }
  50% {
    transform: rotate(900deg);
    animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  }
  100% {
    transform: rotate(1800deg);
  }
}

<div class="lds-hourglass">Loading....</div>

​

Answer 1

只需将背景色设置为:before即可。

请参阅代码片段：

​

.lds-hourglass {
    display: inline-block;
    position: relative;
    width: 120px;
    height: 120px;

}

    .lds-hourglass:after {
        content: " ";
        background-color:black;
        display: block;
        border-radius: 50%;
        width: 0;
        height: 0;
        margin: 8px;
        box-sizing: border-box;
        border: 32px solid #fff;
        border-color: #fff transparent #fff transparent;
        animation: lds-hourglass 1.2s infinite;
    }

@keyframes lds-hourglass {
    0% {
        transform: rotate(0);
        animation-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    }

    50% {
        transform: rotate(900deg);
        animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    }

    100% {
        transform: rotate(1800deg);
    }
}

<div class="lds-hourglass">
Loading....
</div>

​

Answer 2

此动画使用borders生成此形状，更改这些值以更改颜色：

透明边框: 32px solid #f00;

• border-color：#f00 transparent #f00 transparent;

要更改文本的loading..颜色，只需将此行color: #fff添加到您的lds-hourglass样式。

​

.lds-hourglass {
    display: inline-block;
    position: relative;
    width: 120px;
    height: 120px;
    background-color: #fff;
    color: #f00;
}

    .lds-hourglass:after {
        content: " ";
        display: block;
        border-radius: 50%;
        width: 0;
        height: 0;
        margin: 8px;
        box-sizing: border-box;
        border: 32px solid #f00;
        border-color: #f00 transparent #f00 transparent;
        animation: lds-hourglass 1.2s infinite;
    }

@keyframes lds-hourglass {
    0% {
        transform: rotate(0);
        animation-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    }

    50% {
        transform: rotate(900deg);
        animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    }

    100% {
        transform: rotate(1800deg);
    }
}

<div class="lds-hourglass">Loading....</div>

​

Answer 3

尝试用border-color: #fff black #fff black;替换border-color: #fff transparent #fff transparent;

​

.lds-hourglass {
    display: inline-block;
    position: relative;
    width: 120px;
    height: 120px;
    background-color: white;
}

    .lds-hourglass:after {
        content: " ";
        display: block;
        border-radius: 50%;
        width: 0;
        height: 0;
        margin: 8px;
        box-sizing: border-box;
        border: 32px solid #fff;
        border-color: #fff black #fff black;
        animation: lds-hourglass 1.2s infinite;
    }

@keyframes lds-hourglass {
    0% {
        transform: rotate(0);
        animation-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    }

    50% {
        transform: rotate(900deg);
        animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    }

    100% {
        transform: rotate(1800deg);
    }
}

<div class="lds-hourglass">Loading....</div>

​