JavaScript explain that how value should store in java script with out using datatype “var” or “let” explain value chain analysis,explain value,explain value added tax,

here i didn't understand what happen when i use var before variable in function it give me different out put and with out using var also i got a different output

here is a code that you can easily figure out whats going on

function value() {
  var m = 8; //here i am using var as a datatype  
  console.log(m)
}
m = 7
console.log(m);
value();
console.log(m);

Answer:1

Function looks for the m in the functional scope, if it does not find it there, it searches in the higher scope which over here is global scope.

In the first example, function creates a variable m in the function scope and any update will be limited to the variable in the function. So, basically in this example there are 2 variables, with one m belongs to the global scope and one m belongs to the function scope. See the interpretation of code below.

var m;
function value() {
  var m; // creates a variable m in the function scope
  m = 8;
  console.log(m)
}
m = 7
console.log(m);
value();
console.log(m);

Answer:2

Take a look at w3school's JavaScript Scope.

Below is example code of the difference of global variable and local variable.

function value() {
    // local variable in value()
    var m = 8;
    console.log("in value() : " + m)
}
function value2() {
    // set global variable as 9
    m = 9;
    console.log("in value2() : " + m)
}
// global variable
m = 7
console.log("before value() : " + m);
value();
console.log("after value() : " + m);
value2();
console.log("after value2() : " + m);

Answer:3

Using velocity with jquery for IE8 in ES6

I am trying to use velocity together with jQuery (only for IE8 support) in an ES6 module. Consider this code: import { Component } from 'react'; import ReactDOM from 'react-dom'; import jquery from '...

using velocity to find acceleration
using velocity to find force
using velocity in a sentence
using velocity in unity
using velocity to find angle
using velocity in javascript
using velocity to find drag
using velocity in python
using velocity to find energy
using velocity in angular
using velocity points with singapore airlines
using velocity points with etihad

Firefox not opening window in service worker for Push message

Firebase Cloud Messaging I have everything setup, the Push messages are received fine and when I click on it, it opens new window... but only in Chrome, in Firefox it is not opened. I have ...

firefox window opening off screen
firefox opening small window
firefox opening new window instead of tab
firefox opening private window
firefox opening links in new window
firefox not opening private window
firefox not opening new window
firefox keeps opening new window
firefox disable new window opening
firefox prevent opening new window

Why can't my algorithm find the index in my array?

Why is my algorithm returning “-1” meaning that target value 73 isn’t in the array? (When clearly 73 is in the array). [this is from Khan Academy, but isn't helping] It's supposed to return either ...

canvas
canada
cancelled
canceled vs cancelled
cancun
canada goose
cane corso
canes
canadian prime minister
cancun flights
canker sore
candy
cancer
canon
canvas prints
cancer sign
candace owens
canada news
candytopia
canlis

How to move between components in React

import React, { Component } from 'react' import Head from './Head' import Popular from './Popular' import Movie from './Movie' import Search from './Search' class Flix extends Component { ...

move components between layers sketchup
eagle move components between sheets
jira move components between projects
angular move data between components
rtc move files between components