snakecase-keys

What is snakecase-keys?

The snakecase-keys npm package is a utility that converts the keys of an object to snake_case. This can be particularly useful when working with APIs or databases that require snake_case formatting.

What are snakecase-keys's main functionalities?

Convert Object Keys to Snake Case

This feature allows you to convert the keys of an object from camelCase to snake_case. It works recursively, so nested objects are also converted.

const snakecaseKeys = require('snakecase-keys');
const camelCaseObject = { fooBar: 'baz', nestedObject: { helloWorld: 'value' } };
const snakeCaseObject = snakecaseKeys(camelCaseObject);
console.log(snakeCaseObject); // { foo_bar: 'baz', nested_object: { hello_world: 'value' } }

Exclude Specific Keys

This feature allows you to exclude specific keys from being converted to snake_case. You can pass an array of keys to the `exclude` option.

const snakecaseKeys = require('snakecase-keys');
const camelCaseObject = { fooBar: 'baz', nestedObject: { helloWorld: 'value' }, excludeMe: 'no_change' };
const snakeCaseObject = snakecaseKeys(camelCaseObject, { exclude: ['excludeMe'] });
console.log(snakeCaseObject); // { foo_bar: 'baz', nested_object: { hello_world: 'value' }, excludeMe: 'no_change' }

Deep Conversion

This feature ensures that all nested objects are also converted to snake_case. By default, the conversion is deep, but you can control this behavior with the `deep` option.

const snakecaseKeys = require('snakecase-keys');
const camelCaseObject = { fooBar: 'baz', nestedObject: { helloWorld: 'value' } };
const snakeCaseObject = snakecaseKeys(camelCaseObject, { deep: true });
console.log(snakeCaseObject); // { foo_bar: 'baz', nested_object: { hello_world: 'value' } }

Other packages similar to snakecase-keys

camelcase-keys

The camelcase-keys package converts object keys to camelCase. It is the inverse of snakecase-keys and can be useful when you need to convert keys from snake_case to camelCase.

lodash

Lodash is a utility library that provides a wide range of functions for manipulating objects, arrays, and other data types. It includes a `_.snakeCase` function that can be used to convert strings to snake_case, but it does not provide a direct way to convert object keys like snakecase-keys.

change-case

The change-case package provides a set of functions for converting strings between different cases, including snake_case. While it does not directly convert object keys, it can be used in combination with other utilities to achieve similar functionality.

README

snakecase-keys

Convert an object's keys to snake case

Install

$ npm install --save snakecase-keys

Usage

var snakecaseKeys = require('snakecase-keys')

snakecaseKeys({fooBar: 'baz'})
//=> {foo_bar: 'baz'}

snakecaseKeys({'foo-bar': true, nested: {fooBaz: 'bar'}});
//=> {foo_bar: true, nested: {foo_baz: 'bar'}}

API

snakecaseKeys(obj, options) -> object

obj

Required
Type: object

An object to transform into snake case (keys only).

options

Optional
Type: object

deep

Type: boolean
Default: true

Enables snake-casing of keys in nested objects.

exclude

Type: array[string || regexp]
Default: []

An array of strings or regular expressions matching keys that will be excluded from snake-casing.

shouldRecurse(key, val) -> boolean

Optional
Type: function

A function that determines if val should be recursed.

Requires deep: true.

Related

• camelcase-keys
• kebabcase-keys

License

MIT © Ben Drucker