obj-to-fd

Clean and minimalist utility to convert a plain JavaScript Object into a FormData Object (multipart/form-data).

• Functional
• Recursive
• No dependencies
• ~ 20 LOC

Usage

Importing the utility:

const objToFd = require('obj-to-fd');

Converting obj to a FormData Object:

const obj = { person: { name: "Bob", age: 25, children: ["Sarah", "Kyle"] } };
const fData = objToFd(obj);

// fData will look something like:
// person[name]: "Bob", person[age]: "25", person[children][]: "Sarah", person[children][]: "Kyle" ...

Nesting

Nested objects are handled elegantly by recursion. Note: As a FormData Object cannot contain an Object entry, some cases like arrays of Objects (i.e. [{key: val}, {key: val}]) have to be parsed before either by:

• Converting the above to two seperate arrays obj[keys][] and obj[values][]
• Converting the above to use indices as keys obj[0][key], obj[1][key] etc.