Introduction to three ways of naming javascript functions and their differences_Basic knowledge

Introduction to the three ways of naming JavaScript functions and their differences

First place

Second

Third

The above three methods are logically equivalent, but there are still some small differences: Difference 1: The function in Example 1 will be loaded into the scope before the code is executed, while in Example 2 it will be loaded into the scope after the code is executed. There will be a definition only when it is one line; Difference 2: The function declaration will assign a name to the function, while the function expression creates an anonymous function and then assigns the anonymous function to a variable; Difference 3: Example 3 uses Function() Constructor clone functions are generally rarely used because a function usually consists of multiple statements. If they are passed as parameters in the form of strings, it will inevitably make the code less readable.

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