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javascript Variable Hoisting

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SAMER SAEID answered on February 12, 2022 Popularity 9/10 Helpfulness 2/10

answer javascript Variable Hoisting

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javascript Variable Hoisting

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// program to display value
a = 5;
console.log(a);
var a; // 5

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: hoisting javascript

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Contributed on May 21 2022

SAMER SAEID

0 Answers Avg Quality 2/10

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why does javascript have hoisting

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// 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.

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: hoisting hoistin

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Contributed on Mar 03 2022

Smiling Starling

0 Answers Avg Quality 2/10

var hoisting.js

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var defaultname = "John";
var name = "rayn";

function doit() {
  if(!name){
   		var name = defaultname;
  }
  return name;
}

var ourname = doit();
console.log(ourname); //John
// because name inside function will have more priority over outside name variable. 
// And, this inside name variable will be declared in memory as undefined due to hoisting.

Popularity 10/10 Helpfulness 2/10 Language javascript

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Tags: javascript j

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Contributed on Feb 12 2022

imtrinity94

0 Answers Avg Quality 2/10

variable hoisting

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var a = 10;
{
    var a = -10;
}
let b = a;
{
    let b = -20;
}

console.log(b)

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: www.interviewbit.com

Tags: hoisting hoistin

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Contributed on Apr 05 2022

Creepy Cod

0 Answers Avg Quality 2/10

javascript var hoisting

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export default function taskBlock(trueOrFalse) {
  var task = false;
  var task2 = true;

  if (trueOrFalse) {
    var task = true;
    var task2 = false;
  }

  return [task, task2];
}

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: intranet.alxswe.com

Tags: hoisting hoistin

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Contributed on Aug 30 2023

Allan Masiga

0 Answers Avg Quality 2/10

javascript Variable Hoisting

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