ye code shirf is liye comment kiya ki ye meaningful example hai to samajna easy rahega const fs = require("fs"); const fileName = "fsPromises.txt"; const updateData = "Update File Data"; fs.promises .writeFile(fileName, updateData, "utf-8") .then(() => console.log("File written successfully:", updateData)) .catch((error) => { const errorMessage = `${new Date().toISOString()} - Error: ${ error.message } `; fs.promises .appendFile("error.txt", errorMessage, "utf-8") .then(() => console.log("Error logged to file")) .catch((err) => console.log("Failed to write error log:", err)); console.log(error); }); basically is code me ho ye raha hi ki jo error aayegi wo error.txt file me append hoti jayegi helpful laga ho to like kar dijiye