---
title: "lowerFirst"
description: "仅将字符串的第一个字母转换为小写。"
seo_title: "lowerFirst"
seo_description: "Lowercase only the first character of a string while preserving the rest, a small helper for identifier and label formatting."
canonical_url: "https://core.mhaibaraai.cn/docs/transformers/string/lower-first"
---
# lowerFirst

> 仅将字符串的第一个字母转换为小写。

## 用法

仅将字符串的第一个字母转换为小写，其余部分保持不变。

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

lowerFirst('Foo Bar') // => 'foo Bar'
lowerFirst('FOO BAR') // => 'fOO BAR'
```

## API

`lowerFirst(str: string): string`

### 参数

**str** (`string`) *required*: 要转换的字符串。

### 返回值

**string**: 返回首字母小写的字符串。

## Changelog

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


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