---
title: "lowerCase"
description: "Convert a string to lowercase words separated by single spaces, splitting camelCase, snake_case, and kebab-case input first."
canonical_url: "https://core.mhaibaraai.cn/en/docs/transformers/string/lower-case"
---
# lowerCase

> Convert a string to lowercase words separated by single spaces, splitting camelCase, snake_case, and kebab-case input first.

## Usage

Converts a string to lowercase format with words separated by spaces.

```ts
import { lowerCase } from '@movk/core'

lowerCase('firstName') // => 'first name'
lowerCase('First_Name') // => 'first name'
lowerCase('FIRST-NAME') // => 'first name'
lowerCase('XMLHttpRequest') // => 'xml http request'
```

## API

`lowerCase(str: string): string`

### Parameters

**str** (`string`) *required*: The string to convert.

### Returns

**string**: Returns the string in lowercase format.

## Changelog

See commit history for [src/transformers/string/lowerCase.ts](https://github.com/mhaibaraai/movk-core/commits/main/src/transformers/string/lowerCase.ts).

---

- [GitHub](https://github.com/mhaibaraai/movk-core/blob/main/src/transformers/string/lowerCase.ts)


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