N
Nuxt•4mo ago
Fanreza

cant use node-cron in server plugins

// server/plugins/init.ts
import cron from "node-cron";

export default defineNitroPlugin(() => {
    console.log("Initializing server plugins...");
    console.log("Starting scheduler...");

    try {
        const task = cron.schedule("0 0 * * *", async () => {
            console.log("🔄 Running daily cron job at 00:00 UTC");
        });
    } catch (error) {
        console.error(error);
    }
});
// server/plugins/init.ts
import cron from "node-cron";

export default defineNitroPlugin(() => {
    console.log("Initializing server plugins...");
    console.log("Starting scheduler...");

    try {
        const task = cron.schedule("0 0 * * *", async () => {
            console.log("🔄 Running daily cron job at 00:00 UTC");
        });
    } catch (error) {
        console.error(error);
    }
});
when i run this, nothing happen, no error but the server is stoped automatically when i check on website there error saying 
TypeError {▼
  name: 'TypeError',
  message: 'Class extends value [object Module] is not a constructor or null',
  stack: 'Class extends value [object Module] is not a constructor or null\n' +
  'at D:/On Going Project/hanametrics/node_modules/node-cron/dist/esm/tasks/inline-scheduled-task.js:14:35)\n' +
  '    at ModuleJob.run (node:internal/modules/esm/module_job:222:25)\n' +
  '    at async ModuleLoader.import (node:internal/modules/esm/loader:323:24)\n' +
  '    at async loadESM (node:internal/process/esm_loader:28:7)\n' +
  '    at async handleMainPromise (node:internal/modules/run_main:113:12)',
  unhandled: false,
  [Symbol(Symbol.toStringTag)]: 'Error',
}
TypeError {▼
  name: 'TypeError',
  message: 'Class extends value [object Module] is not a constructor or null',
  stack: 'Class extends value [object Module] is not a constructor or null\n' +
  'at D:/On Going Project/hanametrics/node_modules/node-cron/dist/esm/tasks/inline-scheduled-task.js:14:35)\n' +
  '    at ModuleJob.run (node:internal/modules/esm/module_job:222:25)\n' +
  '    at async ModuleLoader.import (node:internal/modules/esm/loader:323:24)\n' +
  '    at async loadESM (node:internal/process/esm_loader:28:7)\n' +
  '    at async handleMainPromise (node:internal/modules/run_main:113:12)',
  unhandled: false,
  [Symbol(Symbol.toStringTag)]: 'Error',
}
right now im using task from nitro but i wonder why i cant use node-cron
2 Replies
kapa.ai
kapa.ai•4mo ago
Hi @Fanreza. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The error you’re encountering when using node-cron in a Nuxt server plugin is due to incompatibility between node-cron and the Nitro server engine that powers Nuxt 3. Nitro produces a standalone server output and has its own way of handling scheduled tasks, which is not compatible with traditional Node.js-only libraries like node-cron. The stack trace: 
TypeError: Class extends value [object Module] is not a constructor or null
TypeError: Class extends value [object Module] is not a constructor or null
indicates an issue with how node-cron is being imported or executed in the Nitro context. This is a common problem when using Node.js-specific packages in Nitro, which is designed to be cross-platform and serverless-friendly, and does not guarantee compatibility with all Node.js APIs or packages. Recommended Approach:
Instead of using node-cron, you should use Nitro’s built-in scheduled tasks feature. Nitro provides a native way to define scheduled tasks in your Nuxt app, which is compatible with its server engine. Here’s how you can define a scheduled task: 1. Enable tasks in your nuxt.config.ts: 
   export default defineNuxtConfig({
     nitro: {
       experimental: {
         tasks: true,
       },
       scheduledTasks: {
         '0 0 * * *': 'daily-task', // Runs daily at midnight
       },
     },
   })
   
   export default defineNuxtConfig({
     nitro: {
       experimental: {
         tasks: true,
       },
       scheduledTasks: {
         '0 0 * * *': 'daily-task', // Runs daily at midnight
       },
     },
   })
2. Create the task file in server/tasks/daily-task.ts: 
   export default defineTask({
     meta: {
       name: 'daily-task',
       description: 'Runs every day at midnight',
     },
     async run() {
       console.log('🔄 Running daily cron job at 00:00 UTC');
       // Your logic here
       return { result: 'Success' }
     }
   })
   
   export default defineTask({
     meta: {
       name: 'daily-task',
       description: 'Runs every day at midnight',
     },
     async run() {
       console.log('🔄 Running daily cron job at 00:00 UTC');
       // Your logic here
       return { result: 'Success' }
     }
   })
This approach is fully supported by Nitro and avoids the compatibility issues you’re seeing with node-cron. For more details and a real-world example, see the related discussion and code in this GitHub issue about Nitro tasks and jsdom. Summary:
You cannot use node-cron in Nuxt 3 server plugins because Nitro is not a pure Node.js environment. Use Nitro’s scheduled tasks instead—they are designed for this purpose and are fully compatible with Nuxt 3 and Nitro’s deployment targets. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------
kapa.ai
kapa.ai•4mo ago
<@462986217164636180> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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