前端Blob数据流转JSON格式

blobToJson = (blobData) => {
  return new Promise((resolve, reject) => {
    const reader: any = new FileReader()
    let jsonData: any
    reader.readAsText(blobData, 'utf-8')
    reader.onload = () => {
      jsonData = JSON.parse(reader.result)
      resolve(jsonData)
    }
    reader.onerror = () => {
      reject(new Error('文件读取失败'))
    }
  })
}