antd/lib/affix/style/index.css

An enterprise-class UI design language and React-based implementation

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