Answers for "why does javascript have hoisting"

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why does javascript have hoisting

// why does javascript have hoisting?

As Stoyan Stefanov explains in "JavaScript Patterns" book, the hoisting is 
result of JavaScript interpreter implementation.

The JS code interpretation is performed in two passes. 
a) During the first pass, the interpreter processes 
variable[NOT the initialitations] and function declarations.

b)The second pass is the actual code execution step. The interpreter processes 
function expressions and undeclared variables.

Thus, we can use the "hoisting" concept to describe such behavior.

Posted by: Guest on March-03-2022

hoisting in javascript

// hoisting is as if your `function fun() {}` was located here. 

fun(); // works. 

function fun() {}

Posted by: Guest on February-01-2022

Source

How does javascript hoisting works?

console.log(num); // Returns 'undefined' from hoisted var declaration (not 6)
var num; // Declaration
num = 6; // Initialization

Posted by: Guest on September-07-2021

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function hoisting in js

console.log(functionBelow("Hello"));
function functionBelow(greet) {
   return `${greet} world`;
}
console.log(functionBelow("Hi"));

Posted by: Guest on March-03-2021

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