Convert CSV to JSON in JavaScript | Delft Stack

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Thu Aug 04 2022 21:58:18 GMT+0000 (Coordinated Universal Time)

const fs = require("fs");
csv = fs.readFileSync("username.csv")

const array = csv.toString().split("\n");

/* Store the converted result into an array */
const csvToJsonResult = [];

/* Store the CSV column headers into seprate variable */
const headers = array[0].split(", ")

/* Iterate over the remaning data rows */
for (let i = 1; i < array.length - 1; i++) {
/* Empty object to store result in key value pair */
const jsonObject = {}
/* Store the current array element */
const currentArrayString = array[i]
let string = ''

let quoteFlag = 0
for (let character of currentArrayString) {
	if (character === '"' && quoteFlag === 0) {
	    quoteFlag = 1
	}
	else if (character === '"' && quoteFlag == 1) quoteFlag = 0
	if (character === ', ' && quoteFlag === 0) character = '|'
	if (character !== '"') string += character
}

let jsonProperties = string.split("|")

for (let j in headers) {
	if (jsonProperties[j].includes(", ")) {
	jsonObject[headers[j]] = jsonProperties[j]
		.split(", ").map(item => item.trim())
	}
	else jsonObject[headers[j]] = jsonProperties[j]
}
/* Push the genearted JSON object to resultant array */
csvToJsonResult.push(jsonObject)
}
/* Convert the final array to JSON */
const json = JSON.stringify(csvToJsonResult);
console.log(json)

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Convert CSV to JSON in JavaScript | Delft Stack

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