---
title: "snakeCase"
description: "将字符串转换为下划线式 (hello_world)。"
seo_title: "snakeCase"
seo_description: "Convert a string to snake_case, lowercasing words and joining them with underscores, ideal for database columns and config keys."
canonical_url: "https://core.mhaibaraai.cn/docs/transformers/string/snake-case"
---
# snakeCase

> 将字符串转换为下划线式 (hello\_world)。

## 用法

将字符串转换为下划线命名格式（snake\_case）。

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

snakeCase('firstName') // => 'first_name'
snakeCase('First Name') // => 'first_name'
snakeCase('first-name') // => 'first_name'
snakeCase('XMLHttpRequest') // => 'xml_http_request'
```

## API

`snakeCase(str: string): string`

### 参数

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

### 返回值

**string**: 返回下划线式格式的字符串。

## Changelog

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


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