I don't know how to emphasise how much closures are important 🙂 but if you are not aware of it, you may face many unpredictable and unexpected issues in your code. Even you are aware of it, you may still have some logical problem due to "Function Closure"
Continue readingIn order to find more details about this usage, follow link below.
https://www.w3schools.com/Js/js_this.asp
I just took the following part from that page.
This topic is very very important in javaScript. It is an unknown behavior of javaScript. Shortly, javaScript compiler moves variables and function declarations
Hoisting is JavaScript's default behavior of moving declarations to the top of the current scope.
Variables and constants declared with let or const are not hoisted!
In JavaScript, a variable can be declared after it has been used.
In other words, a variable can be used before it has been declared.
Hoisting applies to variable declarations and to function declarations.
function declarations are hoisted before variable declarations.
Hoisting is only possible with declaration but not the initialization. JavaScript will not move variables that are declared and initialized in a single line.
Continue readingI sometimes try to remember basis of JavaScript Functions. So, I often exercise about it. I followed this link https://www.w3schools.com/js/js_function_definition.asp. I copied some important descriptions from that link. My aim is to follow this post when I need to remember again 🙂
A JavaScript function is a block of code designed to perform a particular task.
A Function is much the same as a Procedure or a Subroutine, in other programming languages.
You can reuse code: Define the code once, and use it many times.
You can use the same code many times with different arguments, to produce different results.