#NODE FILE MONITOR HOW TO#
#NODE FILE MONITOR INSTALL#
#NODE FILE MONITOR UPDATE#

The resulting log file looks like this: 19:06:48|circuit board The feeding times are logged to a file by pressing a push-button on a circuit board connected to a Raspberry Pi, pressing an Amazon Dash button, or clicking a button through a web interface. The below examples illustrate the trigger event that is fired when any changes or modification is done upon the file in Node.js:Įxample 1: This example shows any changes to the file with the help of fs.In a previous article on counting unique items in a JavaScript array, I introduced you to the system I am creating that enables our family to log when the fish 🐟 in our aquarium have been fed. filename: As the name suggests, this takes a string or buffer input for the filename.eventType: This is a string value that specifies the different types of modification on the file.listener: This is a string value that specifies the character encoding that uses the filename which is passed to the listener.encoding: This is a string value that specifies the character encoding that needs to be used for passing the filename to the user.recursive: This is a boolean value that specifies whether the subdirectories of the given directory should be watched or not.persistent: This is a boolean value that specifies whether the process should continue or not while the file is being watched.options: This is a string or an object that is used for modifying the behavior of the method.filename: This is a string, buffer, or a URL that represents the name of the file (Directory in fs.watch()) that is to be watched.Parameters: The above method accepts 3 parameters which are explained below: It contains a callback listener that always listens to the file and informs of any changes.įs.watchFile() fs.watchFile(filename, listener) The fs.watchFile() method continuously watches for any changes in the given file. This method returns a Watcher object that is basically used for tracking any changes in the file.įs.watch() fs.watch( filename ) This regularly watches for any changes to the file in the given directory. The fs.watch() is an inbuilt application programming interface method provided by the fs module. The difference between the two is fs.watch() method can watch both files and the directories whereas the fs.watchFile is only designed for watching any changes in the file.

#NODE FILE MONITOR HOW TO#

How to resolve 'node' is not recognized as an internal or external command error after installing Node.js ?.

How to read and write JSON file using Node.js ?.

How to read and write Excel file in Node.js ?.

Difference between promise and async await in Node.js.

What are the differences between npm and npx ?.

Difference between node.js require and ES6 import and export.

Mongoose | findByIdAndUpdate() Function.

#NODE FILE MONITOR INSTALL#

How to install the previous version of node.js and npm ?.Difference between Fetch and Axios.js for making http requests.

#NODE FILE MONITOR UPDATE#

How to update Node.js and NPM to next version ?.ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.

Node file monitor