camelcase-keys

Convert object keys to camel case using camelcase

Install

npm install camelcase-keys

Usage

import camelcaseKeys from 'camelcase-keys';

// Convert an object
camelcaseKeys({'foo-bar': true});
//=> {fooBar: true}

// Convert an array of objects
camelcaseKeys([{'foo-bar': true}, {'bar-foo': false}]);
//=> [{fooBar: true}, {barFoo: false}]

camelcaseKeys({'foo-bar': true, nested: {unicorn_rainbow: true}}, {deep: true});
//=> {fooBar: true, nested: {unicornRainbow: true}}

camelcaseKeys({a_b: 1, a_c: {c_d: 1, c_e: {e_f: 1}}}, {deep: true, stopPaths: ['a_c.c_e']}),
//=> {aB: 1, aC: {cD: 1, cE: {e_f: 1}}}

// preserve Uppercase if they are consecutive
camelcaseKeys({'foo-BAR': true, nested: {unicorn_RAINbow: true}}, {deep: true, preserveConsecutiveUppercase: false});
//=> {fooBar: true, nested: {unicornRainbow: true}}
camelcaseKeys({'foo-BAR': true, nested: {unicorn_RAINbow: true}}, {deep: true, preserveConsecutiveUppercase: true});
//=> {fooBAR: true, nested: {unicornRAINbow: true}}

// Convert object keys to pascal case
camelcaseKeys({'foo-bar': true, nested: {unicorn_rainbow: true}}, {deep: true, pascalCase: true});
//=> {FooBar: true, Nested: {UnicornRainbow: true}}

import {parseArgs} from 'node:util';
import camelcaseKeys from 'camelcase-keys';

const commandLineArguments = parseArgs();
//=> {_: [], 'foo-bar': true}

camelcaseKeys(commandLineArguments);
//=> {_: [], fooBar: true}

API

camelcaseKeys(input, options?)

input

Type: object | object[]

An object or array of objects to camel-case.

options

Type: object

exclude

Type: Array<string | RegExp>
Default: []

Exclude keys from being camel-cased.

stopPaths

Type: string[]
Default: []

Exclude children at the given object paths in dot-notation from being camel-cased. For example, with an object like {a: {b: '🦄'}}, the object path to reach the unicorn is 'a.b'.

camelcaseKeys({
	a_b: 1,
	a_c: {
		c_d: 1,
		c_e: {
			e_f: 1
		}
	}
}, {
	deep: true,
	stopPaths: [
		'a_c.c_e'
	]
}),
/*
{
	aB: 1,
	aC: {
		cD: 1,
		cE: {
			e_f: 1
		}
	}
}
*/

deep

Type: boolean
Default: false

Recurse nested objects and objects in arrays.

pascalCase

Type: boolean
Default: false

Uppercase the first character as in bye-bye → ByeBye.

preserveConsecutiveUppercase

Type: boolean
Default: false

Preserve consecutive uppercase characters: foo-BAR → FooBAR if true vs foo-BAR → FooBar if false

Related

• decamelize-keys - The inverse of this package
• snakecase-keys
• kebabcase-keys