包含p标签的字符串中高亮搜索内容

this.searchTxt 是查询的内容， string 有可能包含 p 标签。当查询 p 字母的时候需要避免标签的 p

//高亮
  heightLight(string) {
   let reg = new RegExp(this.searchTxt, "gi");
    let reg1 = /[0-9a-z]/i;
    let arr = ["/", "
", ", "
", ">", "<", ", "];
    if (reg1.test(this.searchTxt)) {
      if (!arr.includes(this.searchTxt)) {
        if (this.searchTxt == "p") {
          string = string.replace(/(<\/?p[^>]*>|p)/gi, function(txt) {
            return `${txt}`;
          });
        } else {
          string = string.replaceAll(reg, function(txt) {
            return `${txt}`;
          });
        }
      }
    } else {
      if (!arr.includes(this.searchTxt)) {
        string = string.replaceAll(
          this.searchTxt,
          `${this.searchTxt}`
        );
      }
    }
    return string;
  }