fix: correctly identify SSR environments

Author: Kalle Ott

package.json

@@ -8,7 +8,7 @@
     "name": "Kalle Ott",
     "url": "https://github.com/kaoDev/"
   },
-  "version": "1.0.0",
+  "version": "1.0.1",
   "main": "dist/index.js",
   "module": "dist/react-lazy-svg.esm.js",
   "typings": "dist/index.d.ts",

src/index.tsx

@@ -173,7 +173,7 @@ export const Icon: FC<{ url: string } & React.SVGProps<SVGSVGElement>> = ({
 }) => {
   const { registerSVG } = useContext(spriteContext);
 
-  if (typeof document !== 'undefined') {
+  if (typeof document === 'undefined') {
     registerSVG(url);
   } else {
     useEffect(() => {