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append-field

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append-field

A [W3C HTML JSON forms spec](http://www.w3.org/TR/html-json-forms/) compliant field appender (for lack of a better name). Useful for people implementing `application/x-www-form-urlencoded` and `multipart/form-data` parsers.


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4,213,928
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Package description

What is append-field?

The append-field npm package is designed to facilitate the manipulation of form data, specifically for appending fields to an existing FormData instance. It is particularly useful in scenarios where you need to dynamically add fields to FormData before submitting it, such as in file uploads or when dealing with complex form structures.

What are append-field's main functionalities?

Appending fields to FormData

This feature allows you to append a new field to an existing FormData object. The code sample demonstrates how to append a simple key-value pair to FormData.

const appendField = require('append-field');
let formData = new FormData();
appendField(formData, 'key', 'value');

Appending nested fields to FormData

This feature enables appending nested fields to FormData, which is useful for representing complex data structures. The code sample shows how to append nested fields to represent a user's name and email.

const appendField = require('append-field');
let formData = new FormData();
appendField(formData, 'user[name]', 'John Doe');
appendField(formData, 'user[email]', 'john@example.com');

Other packages similar to append-field

Readme

Source

append-field

A W3C HTML JSON forms spec compliant field appender (for lack of a better name). Useful for people implementing application/x-www-form-urlencoded and multipart/form-data parsers.

It works best on objects created with Object.create(null). Otherwise it might conflict with variables from the prototype (e.g. hasOwnProperty).

Installation

npm install --save append-field

Usage

import appendField from 'append-field'

const obj = Object.create(null)

appendField(obj, 'pets[0][species]', 'Dahut')
appendField(obj, 'pets[0][name]', 'Hypatia')
appendField(obj, 'pets[1][species]', 'Felis Stultus')
appendField(obj, 'pets[1][name]', 'Billie')

console.log(obj)
{ pets:
   [ { species: 'Dahut', name: 'Hypatia' },
     { species: 'Felis Stultus', name: 'Billie' } ] }

API

appendField(store, key, value)

  • store (object, required)
  • key (string, required)
  • value (any, required)

Adds the field named key with the value value to the object store.

License

MIT

FAQs

Last updated on 24 Jul 2021

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