When my document did not has a head element?

In  this funciton
```
/**
 * Injects CSS code into the document's <head>
 */
export const useStyleSheet = (nodeRef: RefObject<HTMLDivElement>): void => {
```


```
        parentDocument.head.appendChild(styleElement);
```
To 
```   
 (parentDocument.head || parentDocument.body || parentDocument.children[0] || parentDocument).appendChild(styleElement);

```