init

node_modules/ng-zorro-antd/style/mixins/modal-mask.less

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+@import 'box';
+
+.modal-mask() {
+  pointer-events: none;
+
+  &.@{ant-prefix}-zoom-enter,
+  &.@{ant-prefix}-zoom-appear {
+    transform: none; // reset scale avoid mousePosition bug
+    opacity: 0;
+    animation-duration: @animation-duration-slow;
+    user-select: none; // https://github.com/ant-design/ant-design/issues/11777
+  }
+
+  &-mask {
+    .box(fixed);
+    z-index: @zindex-modal-mask;
+    height: 100%;
+    background-color: @modal-mask-bg;
+
+    &-hidden {
+      display: none;
+    }
+  }
+
+  &-wrap {
+    .box(fixed);
+    overflow: auto;
+    outline: 0;
+  }
+}