css将彩色图片设置为灰(黑白)色

<img class="bkg-img" src="https://upload.jianshu.io/users/upload_avatars/7566813/95568c95-b1cf-416b-bed8-b57ab40dff09?imageMogr2/auto-orient/strip|imageView2/1/w/80/h/80/format/webp" />

/* 背景图变灰色*/

.bkg-img{

    -webkit-filter: grayscale(100%);

    -moz-filter: grayscale(100%);

    -ms-filter:grayscale(100%);

    -o-filter: grayscale(100%);

    filter: grayscale(100%);

    filter:gray;

}