Node js Tutorial for Beginners - 3 - Global Objects and Timers (English)
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In Node.js, global objects are objects that are available globally in all modules of your Node.js application. These objects can be accessed without requiring them explicitly in each module. Some of the common global objects in Node.js include:
Global: The global object is the global namespace object in Node.js. Variables and functions declared in the global scope are added as properties and methods of the global object. However, it's important to note that not all global objects are properties of the global object in Node.js, unlike in a web browser environment.
console: The console object provides methods for writing to the console, such as console.log(), console.error(), console.warn(), etc. It is used for debugging, logging information, and error handling in Node.js applications.
setTimeout() and setInterval(): These are functions for creating timers in Node.js. The setTimeout() function is used to execute a callback function after a specified delay, while setInterval() is used to repeatedly execute a callback function at a specified interval. Both functions return a timer object that can be used to cancel the timer using clearTimeout() or clearInterval().
Here's an example of using setTimeout() in Node.js:
console.log(__dirname)
console.log(__filename)
function printSomeThing(){
console.log("I am Printed from Set Interval!!!")
}
setInterval(printSomeThing, 5000)
setInterval(printSomeThing,2000)
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