Transparent (opacity) image from top 0% to bottom 100% in
Transparent (opacity) image from top 0% to bottom 100% in,CSSだけでマウスオーバーしたときに画像を白みがかったように,SVG fill-opacity Attribute - GeeksforGeeks,Compositing with Transparency - Kdenlive,javascript - opacity vs fill-opacity in svg - Stack Overflow