null-guard dataset mxTheme to prevent html exports from exploding (#7493

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matrix-org · Jan 10, 2022 · f7d19a5 · f7d19a5
1 parent 31ab913
commit f7d19a5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/utils/exportUtils/exportCSS.ts b/src/utils/exportUtils/exportCSS.ts
@@ -40,7 +40,7 @@ const getExportCSS = async (usedClasses: Set<string>): Promise<string> => {
     // only include bundle.css and the data-mx-theme=light styling
     const stylesheets = Array.from(document.styleSheets).filter(s => {
         return s.href?.endsWith("bundle.css") ||
-            (s.ownerNode as HTMLStyleElement).dataset.mxTheme.toLowerCase() === "light";
+            (s.ownerNode as HTMLStyleElement).dataset.mxTheme?.toLowerCase() === "light";
     });
 
     let css = "";