# escape-sql-string ![Github Workflow Status](https://github.com/jackall3n/escape-sql-string/actions/workflows/ci.yaml/badge.svg)

Simple SQL string escape.

```typescript
import escapeString from 'escape-sql-string';

const sqlString = "Sup'er"
console.log(escapeString(sqlString)) // => Sup''er
```

## Installation

    npm install escape-sql-string

## Note

Original implementation from [sql-escape-string](https://thlorenz.github.io/sql-escape-string) with the added typescript support

## [API](https://github.com/jackall3n/escape-sql-string)



### escapeString

Escapes the given string to protect against SQL injection attacks.

By default, it assumes that backslashes are not supported as they are not part of the standard SQL spec.
Quoting from the [SQLite website](https://sqlite.org/lang_expr.html):

> C-style escapes using the backslash character are not supported because they are not standard SQL.

This means three things:

-   backslashes and double quotes `"` are not escaped by default
-   single quotes are escaped via `''` instead of `\'`
-   your sql engine should throw an error when encountering a backslash escape
    as part of a string, unless it is a literal backslash, i.e. `'backslash: \\'`.

It is recommended to set the `backslashSupported` option `true` if your SQL
engine supports it. In that case backslash sequences are escaped and single
and double quotes are escaped via a backslash, i.e. `'\''`.

**Parameters**

-   `value` **[String](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)** the original string to be used in a SQL query
-   `options` **[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object)** opts
    -   `options.backslashSupported` **[Boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)?** if `true` backslashes are supported (optional, default `false`)
-   `opts`  

Returns **[String](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)** the original string escaped wrapped in single quotes, i.e. `'mystring'`

## License

MIT

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escape-sql-string

jackall3n

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escape-sql-string