Introduction to ‘decache’

‘decache’ is a vital Node.js utility module that facilitates efficient cache management by removing cached modules. This ensures that your application always loads the most up-to-date version of required modules, thereby optimizing performance and eliminating issues caused by stale cache.

API Examples

Basic Usage

This example demonstrates a simple way to use ‘decache’ in a Node.js application by removing a cached module:

  const decache = require('decache');
  const myModule = require('./myModule');
  
  // Remove the cache for the module
  decache('./myModule');
  
  // Re-require the module
  const myModuleFresh = require('./myModule');

Removing Multiple Cached Modules

You can also decache multiple modules in a sequence to ensure that all are fresh:

  const decache = require('decache');
  
  // Remove caches for multiple modules
  decache('./moduleA');
  decache('./moduleB');
  decache('./moduleC');

Conditional Decaching

Use conditional logic to determine when to decache certain modules:

  const decache = require('decache');
  const env = process.env.NODE_ENV;
  
  if (env === 'development') {
    decache('./devModule');
  } else {
    decache('./prodModule');
  }

App Example with ‘decache’ Integration

Consider a basic web application using Express.js where configuration files need to be updated without restarting the server:

  const express = require('express');
  const decache = require('decache');
  const app = express();
  let config = require('./config');

  app.get('/reload-config', (req, res) => {
    decache('./config');
    config = require('./config');
    res.send('Configuration reloaded!');
  });

  app.get('/', (req, res) => {
    res.send('Current Config: ' + JSON.stringify(config));
  });

  app.listen(3000, () => {
    console.log('Server is running on port 3000');
  });

This example allows you to reload the configuration without needing to restart the server by simply accessing the /reload-config route. This can be particularly useful in production environments where downtime needs to be minimized.

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Integrating ‘decache’ into your Node.js projects can significantly streamline your module handling and enable better performance and easier updates.

For more information and advanced usage, refer to the [official documentation](https://www.npmjs.com/package/decache).

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