jnpf-web-vue3/node_modules/ant-design-vue/es/button/style/group.js

const genButtonBorderStyle = (buttonTypeCls, borderColor) => ({
  // Border
  [`> span, > ${buttonTypeCls}`]: {
    '&:not(:last-child)': {
      [`&, & > ${buttonTypeCls}`]: {
        '&:not(:disabled)': {
          borderInlineEndColor: borderColor
        }
      }
    },
    '&:not(:first-child)': {
      [`&, & > ${buttonTypeCls}`]: {
        '&:not(:disabled)': {
          borderInlineStartColor: borderColor
        }
      }
    }
  }
});
const genGroupStyle = token => {
  const {
    componentCls,
    fontSize,
    lineWidth,
    colorPrimaryHover,
    colorErrorHover
  } = token;
  return {
    [`${componentCls}-group`]: [{
      position: 'relative',
      display: 'inline-flex',
      // Border
      [`> span, > ${componentCls}`]: {
        '&:not(:last-child)': {
          [`&, & > ${componentCls}`]: {
            borderStartEndRadius: 0,
            borderEndEndRadius: 0
          }
        },
        '&:not(:first-child)': {
          marginInlineStart: -lineWidth,
          [`&, & > ${componentCls}`]: {
            borderStartStartRadius: 0,
            borderEndStartRadius: 0
          }
        }
      },
      [componentCls]: {
        position: 'relative',
        zIndex: 1,
        [`&:hover,
          &:focus,
          &:active`]: {
          zIndex: 2
        },
        '&[disabled]': {
          zIndex: 0
        }
      },
      [`${componentCls}-icon-only`]: {
        fontSize
      }
    },
    // Border Color
    genButtonBorderStyle(`${componentCls}-primary`, colorPrimaryHover), genButtonBorderStyle(`${componentCls}-danger`, colorErrorHover)]
  };
};
export default genGroupStyle;