Javascript Snippets

regularExpression.js

//Regular Expression for validation of MobilePhone Numbers

var str = "+0099812731";
var patt = new RegExp("^[+|0/d]([0-9]{12})$");
var res = patt.test(str);
console.log(res);

variables.js

'use strict'

//Variables , Contant and Literals

/* ************VARIABLES**************** */
let age = 24; // Variable 
console.log(age); //Output  - 24


let name , fullname = "Eminem";
console.log('Name : ',name); // Output - Undefined
console.log('Full Name : ',fullname); // Output - Eminem


var value = 23;
console.log('Value :',value); // Output - 23

var temp;
var temp2 =  null;

console.log('Temp :',temp); // Output - undefined
console.log('Temp2 :',temp2); // Output - null

//Note : Null and undefined is not equal

const data = "Hello world"; //Variable -  Constant : Value can not be changed later
console.log('Data : ',data); // Output - Hello world

//data = "my world"; //Expect an Error


/**********************LITERAL*************** */ 

let goal = "Aim right"; //Aim right is literal
let height = 20; //20 is literal