a标签图片下载变成窗口打开问题处理

downloadImage(url, fileName) {

      const videoList = ['mp4', 'avi', 'flv', 'mov']

      let name = fileName

      const urlTypeList = url.split('.')

      const urlType = urlTypeList[urlTypeList.length - 1]

      if (!name.endsWith('.' + urlType)) {

        name = name + '.' + urlType

      }

      // 视频直接下载

      if (videoList.includes(urlType)) {

        const link = document.createElement('a')

        link.download = name

        link.href = url

        link.click()

      } else {

        // 图片flle-saver走下载不走弹窗

        saveAs(url, name)

      }

}