前端文件转为base64

// 获取文件的Base64
const fileToBase64 = (file) => {
  return new Promise((resolve, reject) => {
    const reader = new FileReader()

    reader.onload = (res) => {
      const base = res.target?.result
      resolve(base)
    }

    reader.onerror = (error) => {
      reject(error)
    }

    reader.readAsDataURL(file.raw)
  })
}


await fileToBase64(文件流)