Important APIs in Timers module in Node.js
Application Programming Interface is a set of subroutine definitions, instruction, protocols, and tools for building application software providing a clearly defined method of communication between various software components. It, therefore, becomes easy and convenient when developing computer programs. the API may be for an operating system, a web-based system, database system, computer hardware, and software archive.
The concept of an API pre-dates even the advent of personal computing, let alone the Web, by a very long time! The principal of a well-documented set of publicly addressable “entry points” that allow an application to interact with another system has been an essential part of software development since the earliest days of utility data processing.
However, the advent of distributed systems, and then the web itself, has seen the importance and utility of these same basic concepts increase dramatically according to Martin Bartlett. 2013 marked an important year in the review of APIs and its successes making further development and adoption more advanced and precise
Some of the important APIs in timers module in node.js include
setTimeout()”When I say so” Execution
Can be used for the scheduling of code execution after a designated amount of time usually less than a second and a string of code cannot be passed to be executed. The function to execute is its first priority and the time delay is the argument. Additional arguments can be put in place.
setImmediate()”Right after this” Execution
This will execute at the end of the current event loop cycle. The code will execute after any Axiom I0 operations and before any timers scheduled for the next event loop. It happens right after before the argument. Additional functions will be passed to it when it is executed.
setInterval()”Infinite Loop” Execution
It executes a block of code that should execute multiple times. It runs an infinite number of times considering a particular millisecond delay as the second argument. Additional arguments can be added after the delay to be passed on to the function call.
Clearing the Future
When a timeout or immediate object needs to be canceled, the objects are passed to the respective clear function( clearTimeout(), clearImmediate(), and clearInterval() ) and the execution of that object will be halted immediately
Leaving Timeouts Behind
Timeout object provides two functions intended to argument Timeout behavior with ref() and ref(). If there is a Timeout object scheduled using a set function, ref() can be called on that object. This will change the behavior slightly, and not call the Timeout object if it is the last code to execute.
These are just some of the APIs in the node.js. They are very vital when setting timers and executions making the programmer more efficient.
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