4. 字符串高亮的方法

import React from 'react';
import styles from './style.module.less';
const highLightString = (keyword, matchString) => {
  const highLight = (str) => {
    if(!str) {
      return '--';
    }
    const reg = /((\s*)<(\/*)([\sA-Za-z=]*)>(\s*))/g;
    const str1 = str.toString().replace(reg, '');
    const str2 = str1.replace(/em_full/g, 'span');
    const str3 = str2.replace(/em_part/g, 'span');
    const str4 = str3.replace(/<span>/g, '<span class=' + styles.matchStr + '>');
    return (str4);
  };
  return (<>
    <span
      dangerouslySetInnerHTML={
        { _html: highLight(matchString) }
      }
    >
    </span>
  </>);
};
.matchStr {
  color: #b0020b;
}
export default highLightString;