ExcelJS 瀏覽器端讀取上傳的文件

//ExcelJS 讀取 buffer
export async function loadTable (buffer) {
  var workbook = new Excel.Workbook()
  workbook.xlsx.load(buffer).then(data => {
    console.log(data)
  })
}

// 上傳文件成功後處理
// File -> FileReader -> bufferArray
const buffer = new FileReader()
buffer.readAsArrayBuffer(options.file)
buffer.onload = (e) => {
    loadTable(buffer.result)
}