DEBUG environment variable
Posted: Sun Dec 22, 2024 7:09 am
You can do the same with any other environment variable. For example, try running: JavaScript Copy the code # should output "The value of FOO is: bar" npm start # should output "The value of FOO is: undefined" NODE_ENV=production npm start If you want to know more about if-env, check out its documentation. How to install npm on a Mac Usually this installation is done automatically as part of the above installation.
You can verify this by running the npm command in 11-digit phone number format philippines the terminal. If the installation was successful, you will see a list of usages. If not, to install npm, run the following command: Bash Copy the code sudo apt install npm Debugging in Node.js The next step is debugging. One strategy that helped me a lot was to use the to receive more detailed logs for many modules.
Take, for example, a basic express server like this: JavaScript Copy the code const app = require('express')(); const bodyParser = require('body-parser'); app.use(bodyParser.json()); // for parsing application/json app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded app.post('/', (req, res, next) => { console.log(req); }); app.listen(3000); Run it with the DEBUG variable set to *: JavaScript Copy the code DEBUG=* node server.
js You will receive detailed logs that look like this: The magic behind it is a lightweight module called debug. When you want to use it, you just initialize it with a "namespace". You can then connect to that namespace. If someone wants to see the output, they just need to enable the namespace in the DEBUG variable.
You can verify this by running the npm command in 11-digit phone number format philippines the terminal. If the installation was successful, you will see a list of usages. If not, to install npm, run the following command: Bash Copy the code sudo apt install npm Debugging in Node.js The next step is debugging. One strategy that helped me a lot was to use the to receive more detailed logs for many modules.
Take, for example, a basic express server like this: JavaScript Copy the code const app = require('express')(); const bodyParser = require('body-parser'); app.use(bodyParser.json()); // for parsing application/json app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded app.post('/', (req, res, next) => { console.log(req); }); app.listen(3000); Run it with the DEBUG variable set to *: JavaScript Copy the code DEBUG=* node server.
js You will receive detailed logs that look like this: The magic behind it is a lightweight module called debug. When you want to use it, you just initialize it with a "namespace". You can then connect to that namespace. If someone wants to see the output, they just need to enable the namespace in the DEBUG variable.