JavaScript导出csv格式文件

export default function JSONToCSVConvertor(JSONData, ReportTitle, ShowLabel) {
  //  If JSONData is not an object then JSON.parse will parse the JSON string in an Object
  const arrData = typeof JSONData !== 'object' ? JSON.parse(JSONData) : JSONData
  let CSV = ''
 // Set Report title in first row or line
  CSV += `${ReportTitle}\r\n\n`
// This condition will generate the Label/Header
if (ShowLabel) {
let row = ''
  // This loop will extract the label from 1st index of on array
  for (let index in arrData[0]) {
    // Now convert each value to string and comma-seprated
        row += `${index},`
        }

  row = row.slice(0, -1)
  // append Label row with line break
  CSV += `${row}\r\n`
}
// 1st loop is to extract each row
for (let i = 0; i < arrData.length; i++) {
  let row = ''
  // 2nd loop will extract each column and convert it in string comma-seprated
  for (let index in arrData[i]) {
        row += `${arrData[i][index]},`
    }

  row.slice(0, row.length - 1)
  // add a line break after each row
  CSV += `${row}\r\n`
}

if (CSV === '') {
  return
}
// Generate a file name
let fileName = 'MyReport_'
// this will remove the blank-spaces from the title and replace it with an underscore
fileName += ReportTitle.replace(/ /g, '_')
// Initialize file format you want csv or xls
const uri = `data:text/csv;charset=utf-8,${escape(CSV)}`
// Now the little tricky part.
// you can use either>> window.open(uri);
// but this will not work in some browsers
// or you will not get the correct file extension
// this trick will generate a temp  tag
const link = document.createElement('a')
link.href = uri

// set the visibility hidden so it will not effect on your web-layout
link.style = 'visibility:hidden'
link.download = `${fileName}.csv`

// this part will append the anchor tag and remove it after automatic click
document.body.appendChild(link)
link.click()
document.body.removeChild(link)
}