String复杂情况，多个同字符替换

replaceAll(str, searchValue, replaceValue) {
      return str.replace(new RegExp(searchValue,"gm"),replaceValue);
    },

• str：需要替换的字符串
• searchValue：需要替换的字符
• replaceValue：要替换的字符

点击下载获取下载链接创建<a>标签下载

async btnExport(url) {
      let that = this;
      this.loading = true;
      let a = document.createElement('a');//创建a标签
      a.href =  url;//文件url
      document.body.appendChild(a);
      a.click();//触发下载
      document.body.removeChild(a);
      setTimeout(async () => {
        that.loading = false;
      }, 4000);//4s后关闭loading，可以根据情况增减
    },

• url：异步请求获取的链接地址

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