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SomeBasicJSKnowledge,ProgrammingRookieMustKnow(II)

(2019-03-07 14:15:16)

Features

JavaScript is a scripting language belonging to the network, which has been widely used in the development of Web applications. It is often used to add various dynamic functions to web pages, and to provide users with more smooth and beautiful browsing effect.square steel tubing Usually JavaScript scripts implement their functions by embedding them in HTML.

 SomeBasicJSKnowledge,ProgrammingRookieMustKnow(II)


About JS Closure

JavaScript variables can be local or global. Private variables can be used for closures. Before we understand about JS Closure, I have to explain some concept about Global variables and local variables, with differences between two kinds of variables.

 

Variable Life Cycle

The scope of global variables is global, that is, global variables are everywhere in the entire JavaScript program. Variables declared within a function only work within the function. These variables are local variables and their scopes are local; the parameters of a function are also local and only work within the function.

 


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