Two ways to call self-executing functions in js

This article brings you two methods of calling self-executing functions in js. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Self-executing function definition:
After the self-executing function or self-calling function is declared, it will be called immediately. It can only be used once. There are two ways to write it.

Writing method one:(function)(actual parameter)

Writing method two:Format: (function (actual parameter)) is as follows

Generally, self-executing functions and closures are related, because generally when we use closures, the closures obtain the final value of the variable, so we need to use the self-executing function to get the value of the variable each time. Bind it to a closure so that the closure can get the value of each variable change.

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