CSS实现混合模式mix-blend-mode。正片叠底、滤色、叠加等ps效果用代码的方实现

存在兼容问题，自己实验设备可用不可用

mix-blend-mode: normal;          //正常
mix-blend-mode: multiply;        //正片叠底
mix-blend-mode: screen;          //滤色
mix-blend-mode: overlay;         //叠加
mix-blend-mode: darken;          //变暗
mix-blend-mode: lighten;         //变亮
mix-blend-mode: color-dodge;     //颜色减淡
mix-blend-mode: color-burn;      //颜色加深
mix-blend-mode: hard-light;      //强光
mix-blend-mode: soft-light;      //柔光
mix-blend-mode: difference;      //差值
mix-blend-mode: exclusion;       //排除
mix-blend-mode: hue;             //色相
mix-blend-mode: saturation;      //饱和度
mix-blend-mode: color;           //颜色
mix-blend-mode: luminosity;      //亮度
mix-blend-mode: initial;         //初始
mix-blend-mode: inherit;         //继承
mix-blend-mode: unset;           //复原

转发文章：https://www.cnblogs.com/liu-fei-fei/p/5885449.html