Name: 解釋Javascript Closures（初學者教程）。 (Javascript Closures explained( Beginners Tutorial))
Uploaded: 2021-01-14T07:34:58.000Z
Duration: 16 min 26 s
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JavaScript Object Oriented Programming concepts.

In the first lab we talked about what are JavaScript objects, in the 2nd lab we talked about

the basic concept of Closures in JavaScript.

proper Object Oriented Programming concept

Let us say, we create a function here called as Counter

has a different state than this call of the counter.

gets created on running memory called as Stack.

The counter variable gets allocated on the Stack

When we run for the second time a new running memory is created.

the functions and the variable should stay in the memory.

One of the things which can come to our mind is

the variable is created globally on the browser.

with the approach of creating the variables globally.

modules, functions, methods. They should be self contained.

They should be isolated self contained modules.

If we going to have such kind of global variables and they are accessed by the counter function, we can have problems.

If there is some other function called as MyCounter.

It is also incrementing the same variable then we can have unwanted

we want the module to be self contained, they should be isolated, they should be a single unit.

It should have a different instance all together.

That's where JavaScript Closures comes into picture.

a Closure is a function inside a function.

Will create a method called as Increment.

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解釋Javascript Closures（初學者教程）。 (Javascript Closures explained( Beginners Tutorial))

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