5.1. JavaScript

5.1.1. Varibles

var x = 1;
let y = 2;
const z = 3;

5.1.2. Datatypes

let x;
x = 123;
x = "hello world";
//Array
x = ["aa", "bb", 123];
//Object
x = {"aa": 12, bb: "hhh", 33: "aaa"};
//RegExp
x = /^A.+/;

5.1.3. Conditionals

if (condition1) {
   statement1;
 } else if (condition2) {
   statement2;
 } else if (conditionN) {
   statementN;
 } else {
   statementLast;
 }


 switch (expression) {
   case label1:
     statements1;
     break;
   case label2:
     statements2;
     break;
   // …
   default:
     statementsDefault;
 }

5.1.4. Loops

for (initialization; condition; afterthought)
   statement

 while (condition)
     statement

 for (variable in object)
   statement

 for (variable of iterable)
   statement

5.1.5. Functions

function FunName(Args) {
  statement
}


const square = function (number) {
  return number * number;
};

const factorial = function fac(n) {
  return n < 2 ? 1 : n * fac(n - 1);
};

//Immediately Invoked Function Expressions (IIFE)
(function (name){console.log("hello world.");})();

5.1.6. DOM

5.1.7. References

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/