Let's talk about the implementation summary of the closure principle

question? What is the closure principle of js (javaScript) and what is its function? 1. Definition Official explanation: A closure is an expression (usually a function) that has many variables and an environment bound to these variables, so these variables are also part of the expression. Obviously, ya. . . . . What! Rural people can’t understand the door-smashing! ! ! So the editor's understanding is this: **** is a function defined in a function and can be accessed externally. (Under normal circumstances, we cannot access local functions) This is a bit like taking off your pants and farting. It is unnecessary, but it is not unnecessary. Closures definitely have their uses. Function: 1. It can reduce the objects of global variables and prevent global variables from being too large in the past, making it difficult to maintain. 2. Prevent modifiable variables, because internal variables are inaccessible from the outside and cannot be modified. Security 3. Read the variables inside the function. The other is to keep the values ​​of these variables in the memory. 2. Example: (js code) 1. Javascript

1. Understanding the closure principle of js

Introduction: Question? What is the closure principle of js (javaScript) and what is its function? 1. Definition Official explanation: A closure is an expression (usually a function) that has many variables and an environment bound to these variables, so these variables are also part of the expression. Obviously, ya. . . . . What! Rural people can’t understand the door-smashing! ! ! So the editor's understanding is this: **** is a function defined in a function and can be accessed externally. (Under normal circumstances we cannot access local functions) This is a bit similar

2. Analysis of closure principles in JavaScript_javascript skills

Introduction: When I see the word closure, I will think of the closed space in linear algebra. That is to say, all vectors in this space, no matter what operations are performed, the final result is still will fall into this space. So is there a similar concept in JavaScript?

3. Understanding Javascript_01_Understanding memory allocation principle analysis_javascript skills

Introduction: Before I officially start, I would like to say a few words. The series of blog posts on understanding javascript explains the principles of javascript by leading you to analyze the memory allocation when javascript is executed. It will specifically cover javascript preloading. , Closure principle, aspect object, execution model, object model... The perspective of the article is very special and very in-depth. I hope everyone can accept this form and provide valuable opinions.

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