var or const in javascript
// var declares a variable, meaning its value will vary.
// const declares a constant, meaning its value will remain
// consistant and not change.
// If your variable changes throughout the program or website,
// declare it using a var statement.
// Otherwise, if its value does not change, declare it using
// a const statement.
const myConst='A const does not change.';
var myVar='A var does change.';
var myVar=2;js define constant by element id
const elem = document.getElementById('elementID');const {} = object in javascript
/*The destructuring assignment syntax is a JavaScript expression that
makes it possible to unpack values from arrays, or properties from objects,
into distinct variables.*/
let array = [2,3];
[a,b] = array;// unpacking array into var a and b
console.log(a); //output 2
console.log(b); //output 3
let object = {name:"someone",weight:"500pounds"};
let {name,weight} = object; // unpacking object into var name and weight
console.log(name);// output someone
console.log(weight);//output 500pounds
//it i similar as doing this
/*
var a = array[0];
var b = array[1]
var name = object.name;
var weight = object.weight;
*/const
// `let` vs `var` vs `const` in 'javascript'
"let" allows you to declare local variable whose scope
is limited to the block statement.
"var" allows you to declare a variable globally or locally
to an entire function.
"Const" just like let, are block-scoped.
It's value can't be reassigned and it can't be redeclared.constants in js
static methodName() { ... }
static propertyName [= value];Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
