React_Client_App_Access/node_modules/@emotion/cache/README.md

# @emotion/cache

### createCache

`createCache` allows for low level customization of how styles get inserted by emotion. It's intended to be used with the [`<CacheProvider/>`](https://emotion.sh/docs/cache-provider) component to override the default cache, which is created with sensible defaults for most applications.

```javascript
import createCache from '@emotion/cache'

export const myCache = createCache({
  key: 'my-prefix-key',
  stylisPlugins: [
    /* your plugins here */
  ]
})
```

### Primary use cases

- Using emotion in embedded contexts such as an `<iframe/>`

- Setting a [nonce](#nonce-string) on any `<style/>` tag emotion creates for security purposes

- Using emotion with a developer defined `<style/>` tag

- Using emotion with custom Stylis plugins

## Options

### `nonce`

`string`

A nonce that will be set on each style tag that emotion inserts for [Content Security Policies](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP).

### `stylisPlugins`

`Function` | `Array<Function>`

A Stylis plugin or plugins that will be run by Stylis during preprocessing. [Read the Stylis docs to find out more](https://github.com/thysultan/stylis.js#plugins). This can be used for many purposes such as RTL.

### `prefix`

`boolean` | `Function`, defaults to `true`

Allows changing Stylis's vendor prefixing settings. It can be a boolean or a function to dynamically set which properties are prefixed. [More information can be found in the Stylis docs](https://github.com/thysultan/stylis.js#vendor-prefixing).

### `key`

`string`, defaults to `"css"`

The prefix before class names. It will also be set as the value of the `data-emotion` attribute on the style tags that emotion inserts and it's used in the attribute name that marks style elements in `renderStylesToString` and `renderStylesToNodeStream`. This is **required if using multiple emotion caches in the same app**.

### `container`

`HTMLElement`

A DOM node that emotion will insert all of its style tags into. This is useful for inserting styles into iframes.