Javascript advanced

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• can be reassigned but NOT redefined

• var

• can be reassigned and redefined

• const

• cannot be reassigned another value.

• let

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• function passed as an argument to anothe

• anonymous arrow function syntax

• () => { }

• callback functions

• const x = function (a, b) {return a * b}

• function expression stored in a variable

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• scope

• where variables and function declarations are moved to the top of their scope before code execution

• DOM manipulation

• changing the structure, content, or style of a web page using JavaScript

• hoisting

• the context in which the variable is accessible. There are global scope, function scope, and block scope in JavaScript.

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• ==

• strict equality comparison that does not perform type coercion and requires the operands to have the same type

• &&

• loose equality comparison that performs type coercion if necessary to make the comparison possible

• ===

• AND operator

• ||

• OR operator

the data representation of the objects that comprise the structure and content of a document on the web

• DON

• DOM

• MOM

• TOM

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• call stack

• to keep track of its place, in a script that calls multiple functions— what function is currently being run and what functions are called from within that function

• function binding

• (function(){
  console.log("This function is called immediately");
  })();

• self-invoking function

• an inner function having access to an outer/parent function scope, even after the outer/parent function has closed

• closure

• returns a “bound variant” of function func that fixes the context this and first arguments if given