ant-design-vue/es/_util/cssinjs/linters/parentSelectorLinter.js

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

import { lintWarning } from './utils';
const linter = (_key, _value, info) => {
  if (info.parentSelectors.some(selector => {
    const selectors = selector.split(',');
    return selectors.some(item => item.split('&').length > 2);
  })) {
    lintWarning('Should not use more than one `&` in a selector.', info);
  }
};
export default linter;