Add usage cases

tshemsedinov · tshemsedinov · commit 53df6687b38a · 2024-07-18T00:13:46.000+03:00
diff --git a/JavaScript/8-promisify.js b/JavaScript/8-promisify.js
@@ -20,12 +20,25 @@ const main = async () => {
   const fileName = '8-promisify.js';
   const data = await read(fileName, 'utf8');
   console.log(`File "${fileName}" size: ${data.length}`);
+
+  // Call from try/catch block
   try {
     const data = await read('unknown.file', 'utf8');
     console.log(`File size: ${data.length}`);
   } catch (error) {
     console.error(error.message);
   }
+
+  // Set default value in promise.catch block
+  const content = await read('unknown.file').catch((error) => {
+    console.error(error.message);
+    return null;
+  });
+  // Warning: note that you need additional if-statement
+  if (content) {
+    console.log({ content });
+    console.log(`File size: ${content.size}`);
+  }
 };
 
 main();
