fix: check if text is undefined before rending plain text

Author: sommeeeer

src/batch/batch.ts

@@ -41,14 +41,14 @@ export class Batch {
             );
           }
         }
-        const [html, text] = await Promise.all([
-          this.renderAsync(email.react as React.ReactElement),
-          this.renderAsync(email.react as React.ReactElement, {
-            plainText: true,
-          }),
-        ]);
+        const reactElement = email.react as React.ReactElement;
+        const html = await this.renderAsync(reactElement);
         email.html = html;
-        email.text = text;
+        if (email.text === undefined) {
+          email.text = await this.renderAsync(reactElement, {
+            plainText: true,
+          });
+        }
         email.react = undefined;
       }
 

src/emails/emails.ts

@@ -52,14 +52,13 @@ export class Emails {
       }
 
       const reactElement = payload.react as React.ReactElement;
-      const [html, text] = await Promise.all([
-        this.renderAsync(reactElement),
-        this.renderAsync(reactElement, {
-          plainText: true,
-        }),
-      ]);
-      payload.text = text;
+      const html = await this.renderAsync(reactElement);
       payload.html = html;
+      if (payload.text === undefined) {
+        payload.text = await this.renderAsync(reactElement, {
+          plainText: true,
+        });
+      }
     }
 
     const data = await this.resend.post<CreateEmailResponseSuccess>(