Case Analysis of JavaScript scope

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A scope is a collection of accessible variables.

JavaScript scope

In JavaScript, objects and functions are also variables.

In JavaScript, the scope is a collection of accessible variables, objects, and functions.

The scope of the JavaScript function: the scope is modified within the function.

JavaScript local scope

Variables are declared within the function and are locally scoped.

Local variables: can only be accessed within the function.

Example

/ / the carName variable cannot be called here

Function myFunction () {

Var carName = "Volvo"

/ / the carName variable can be called within the function

}

Because local variables only act within functions, different functions can use variables with the same name.

Local variables are created when the function starts to execute, and the local variables are automatically destroyed after the function is executed.

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