记录-关于axios“GET”请求获取到pdf文件流下载的问题

不是使用axios的原因，也不是responseType未设置的原因，仅仅是因为我把请求参数和responseType分成俩对象导致被忽略了…具体get请求传参的可以去看官网，这里记录下因为传参导致我下载文件出的错误。
对比代码放在下面，希望和我碰到同样问题的同学能少踩坑

//正确写法
	axios.get(url, { params:{ xxx: 'xx' }, responseType: 'blob' }).then(res => {
        const link = document.createElement('a')
        let blob = new Blob([res.data])
        link.style.display = 'none'
        link.href = URL.createObjectURL(blob)
        const temp = decodeURI(
          res.headers.map['content-disposition'][0]
            .split(';')[1]
            .split('=')[1]
        )
        let iconv = require('iconv-lite')
        iconv.skipDecodeWarning = true
        let filename = iconv.decode(temp, 'UTF-8')
        link.setAttribute('download', filename)
        document.body.appendChild(link)
        link.click()
        document.body.removeChild(link)
      })   
//错误写法
      axios.get(url, { xxx: 'xx' }, { responseType: 'blob' }).then(res => {
        const link = document.createElement('a')
        let blob = new Blob([res.data])
        link.style.display = 'none'
        link.href = URL.createObjectURL(blob)
        const temp = decodeURI(
          res.headers.map['content-disposition'][0]
            .split(';')[1]
            .split('=')[1]
        )
        let iconv = require('iconv-lite')
        iconv.skipDecodeWarning = true
        let filename = iconv.decode(temp, 'UTF-8')
        link.setAttribute('download', filename)
        document.body.appendChild(link)
        link.click()
        document.body.removeChild(link)
      })