[#44] Check if document object exists before using it (#45)

* Check if document object exists before using it.

* Wrap whole code inside if block

Co-authored-by: Paolo Bozac <[email protected]>

Author: CroModder

src/utils.ts

@@ -48,9 +48,9 @@ function injectionCSSCodePlugin(cssToInject: string, styleId?: string): Plugin {
             if (id == cssInjectedByJsId) {
                 const cssCode = JSON.stringify(cssToInject.trim());
 
-                return `try{var elementStyle = document.createElement('style');${
+                return `try{if (typeof document !== 'undefined'){var elementStyle = document.createElement('style');${
                     typeof styleId == 'string' && styleId.length > 0 ? `elementStyle.id = '${styleId}';` : ''
-                }elementStyle.appendChild(document.createTextNode(${cssCode}));document.head.appendChild(elementStyle);}catch(e){console.error('vite-plugin-css-injected-by-js', e);}`;
+                }elementStyle.appendChild(document.createTextNode(${cssCode}));document.head.appendChild(elementStyle);}}catch(e){console.error('vite-plugin-css-injected-by-js', e);}`;
             }
         },
     };