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Today, I would like to share with you the relevant knowledge of what the function of JavaScript runs in parallel. The content is detailed and the logic is clear. I believe most people still know too much about this, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

Functions that run in parallel with other functions are called asynchronous.

A good example is JavaScript setTimeout ()

The purpose is to demonstrate the syntax of the callback function:

Example

Function myDisplayer (some) {

Document.getElementById ("demo"). InnerHTML = some

}

Function myCalculator (num1, num2, myCallback) {

Let sum = num1 + num2

MyCallback (sum)

}

MyCalculator (5, 5, myDisplayer)

In the above example, myDisplayer is the name of the function.

It is passed as an argument to myCalculator ().

In the real world, callbacks are most often used with asynchronous functions.

A typical example is JavaScript setTimeout ().

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