ng-zorro-antd/affix/style/index.css

An enterprise-class UI components based on Ant Design and Angular

/* stylelint-disable at-rule-empty-line-before,at-rule-name-space-after,at-rule-no-unknown */
/* stylelint-disable no-duplicate-selectors */
.ant-affix {
  position: fixed;
  z-index: 10;
}
nz-affix {
  display: block;
}