在CSS中添加如下样式:
.mat-button, .mat-icon-button, .mat-raised-button, .mat-fab, .mat-mini-fab { overflow: visible; }
.mat-button-focus-overlay { border-radius: 50%; }
.mat-ripple-element { border-radius: 50%; }
.mat-button-ripple:not(.mat-focused) { opacity: 0.2; }
.mat-button-ripple.mat-focused { opacity: 0.6; }
这将使涟漪特效呈现为圆形并在元素内部,而不是偏离元素。