How to convert JSON to FormData for better file uploading using Ajax

 convertJsonToFormData(data) { const formData = new FormData() const entries = Object.entries(data) // returns array of object property as [key, value] // https://medium.com/front-end-weekly/3-things-you-didnt-know-about-the-foreach-loop-in-js-ff02cec465b1 for (let i = 0; i < entries.length; i++) { // don't try to be smart by replacing it with entries.each, it has drawbacks const arKey = entries[i][0] let arVal = entries[i][1] if (typeof arVal === 'boolean') { arVal = arVal === true ? 1 : 0 } if (Array.isArray(arVal)) { console.log('displaying arKey') console.log(arKey) console.log('displaying arval') console.log(arVal) if (this.isFile(arVal[0])) { for (let z = 0; z < arVal.length; z++) { formData.append(`${arKey}[]`, arVal[z]) } continue // we don't need to append current element now, as its elements already appended } else if (arVal[0] instanceof Object) { for (let j = 0; j < arVal.length; j++) { if (arVal[j] instanceof Object) { // if first element is not file, we know its not files array for (const prop in arVal[j]) { if (Object.prototype.hasOwnProperty.call(arVal[j], prop)) { // do stuff if (!isNaN(Date.parse(arVal[j][prop]))) { // console.log('Valid Date \n') // (new Date(fromDate)).toUTCString() formData.append( `${arKey}[${j}][${prop}]`, new Date(arVal[j][prop]) ) } else { formData.append(`${arKey}[${j}][${prop}]`, arVal[j][prop]) } } } } } continue // we don't need to append current element now, as its elements already appended } else { arVal = JSON.stringify(arVal) } } if (arVal === null) { continue } formData.append(arKey, arVal) } return formData },