GH-43: Fix "ReferenceError: document is not defined" issue for SSR

Author: ArtyomVancyan

src/styles.ts

@@ -11,14 +11,17 @@ export const jsonToCss = (stylesheet: object) => {
 
 export const injectStyles = (cssText: string) => {
     /** Inject the given `cssText` in the document head */
-    const style = document.createElement("style");
-    style.setAttribute("type", "text/css");
+    try {
+        const style = document.createElement("style");
+        style.setAttribute("type", "text/css");
 
-    if ((style as any).styleSheet) {
-        (style as any).styleSheet.cssText = cssText;
-    } else {
-        style.appendChild(document.createTextNode(cssText));
-    }
+        if ((style as any).styleSheet) {
+            (style as any).styleSheet.cssText = cssText;
+        } else {
+            style.appendChild(document.createTextNode(cssText));
+        }
 
-    document.head.appendChild(style);
+        document.head.appendChild(style);
+    } catch (err) {
+    }
 }