подъем в JavaScript
// hoisting is as if your `function fun() {}` was located here.
fun(); // works.
function fun() {}
madhav
// hoisting is as if your `function fun() {}` was located here.
fun(); // works.
function fun() {}x = 5; // Assign 5 to x
elem = document.getElementById("demo"); // Find an element
elem.innerHTML = x; // Display x in the element
var x; // Declare xhoistedVariable = 3;
console.log(hoistedVariable); // outputs 3 even when the variable is declared after it is initialized
var hoistedVariable;// Example 1
// Only y is hoisted
x = 1; // Initialize x, and if not already declared, declare it - but no hoisting as there is no var in the statement.
console.log(x + " " + y); // '1 undefined'
// This prints value of y as undefined as JavaScript only hoists declarations
var y = 2; // Declare and Initialize y
// Example 2
// No hoisting, but since initialization also causes declaration (if not already declared), variables are available.
a = 'Cran'; // Initialize a
b = 'berry'; // Initialize b
console.log(a + "" + b); // 'Cranberry'