Javascript advanced

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• can be reassigned but NOT redefined

• let

• can be reassigned and redefined

• const

• cannot be reassigned another value.

• var

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• function passed as an argument to anothe

• anonymous arrow function syntax

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

• function expression stored in a variable

• () => { }

• callback functions

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• hoisting

• 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

• scope

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

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• ===

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

• ==

• OR operator

• &&

• AND operator

• ||

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

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

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

• closure

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

• self-invoking function

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

• function binding

• 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