Converting JSON object to CSV format in JavaScript

Question

I am trying to convert a JavaScript object set in to CSV format

You can get the idea about my Javascript object, if you put it in online JSON parser http://json.pars

Answer 1

This is a quick & dirty, but probably works for most cases:

const headers = Object.keys(objAry[0])
console.log(headers.join())

objAry.forEach(r => console.log(
   Object.values(r)
   .map(c => Array.isArray(c)? `"${c.join()}"` : c)
   .join())
)

Answer 2

Below code will convert and download JSON array to csv as a file.

 function exportJSONToCSV(objArray) {
    var arr = typeof objArray !== 'object' ? JSON.parse(objArray) : objArray;
    var str =
      `${Object.keys(arr[0])
        .map((value) => `"${value}"`)
        .join(',')}` + '\r\n';
    var csvContent = arr.reduce((st, next) => {
      st +=
        `${Object.values(next)
          .map((value) => `"${value}"`)
          .join(',')}` + '\r\n';
      return st;
    }, str);
    var element = document.createElement('a');
    element.href = 'data:text/csv;charset=utf-8,' + encodeURI(csvContent);
    element.target = '_blank';
    element.download = 'export.csv';
    element.click();
  }

Answer 3

Here's a solution similar to mightybruno's answer that handles strings containing commas. None of the other answers seem to take this in to consideration.

function objectsToCSV(arr) {
    const array = [Object.keys(arr[0])].concat(arr)
    return array.map(row => {
        return Object.values(row).map(value => {
            return typeof value === 'string' ? JSON.stringify(value) : value
        }).toString()
    }).join('\n')
}