How to use setImmediate(callback) in Async
setImmediate(callback) is a method provided by the Async module that defers a callback function’s execution until the next event loop iteration.
In Node.js, this is called setImmediate. The browser will use setImmediate if available; otherwise, setTimeout(callback, 0) will be used (this means other higher priority events may precede the execution of the callback function).
Syntax
setImmediate(callback, args...)
callback: The function to call on a later loop around the event loop.args...: (Optional) Additional arguments to pass to the callback.
Example
In this example, we defer the execution of a function that accepts a name argument and outputs that name to the console.
Notice that the statement console.log('1. Hello') runs before the statement console.log('2.', name) inside the callback function passed to setImmediate().
import setImmediate from 'async/setImmediate';// Defering the execution of a function.setImmediate(function(name) {// This will run secondconsole.log('2.', name);}, 'World');// This will run firstconsole.log('1. Hello');
For information on
nextTick(callback), a function similar tosetImmediate(callback)in the Async module, click here.
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