setImmediate() nodejs
setImmediate()
is a function in Node.js that allows you to schedule a callback function to be executed immediately after the current phase of the event loop.
Here are the steps involved in using setImmediate()
in Node.js:
- First, you need to require the
setImmediate()
function from thetimers
module in Node.js. You can do this by using therequire()
function and passing in the name of the module as a parameter:
javascript
const { setImmediate } = require('timers');
- Once you have required the
setImmediate()
function, you can use it to schedule a callback function to be executed immediately after the current phase of the event loop. To do this, you need to pass the callback function as a parameter to thesetImmediate()
function:
javascript
setImmediate(() => {
// Your callback function logic here
});
The callback function will be executed asynchronously, meaning that it will not block the execution of the rest of your code.
- You can also pass additional arguments to the callback function by specifying them after the callback function:
javascript
setImmediate((arg1, arg2) => {
// Your callback function logic here
}, arg1, arg2);
The additional arguments will be passed to the callback function when it is executed.
- You can cancel the scheduled immediate callback using the
clearImmediate()
function. This function takes a single parameter, which is the immediate object returned by thesetImmediate()
function:
```javascript const immediateObject = setImmediate(() => { // Your callback function logic here });
clearImmediate(immediateObject); ```
Calling clearImmediate()
will prevent the callback function from being executed.
That's it! These are the steps involved in using setImmediate()
in Node.js. It allows you to schedule a callback function to be executed immediately after the current phase of the event loop.