How do you manage global variables in JavaScript?

var window. iAmGlobal = "some val" ; //Global variable declaration with window. /In any other part of the code. doSomething function () alert(window. iAmGlobal); /I am also available here!! /OR. alert(iAmGlobal); /I am also available here!!

Course Content

Introduction to Javascript

20m 47s

How to use LearnVern

3m 20s

Javascript Features

17m 46s

Ways to write and Add Javascript code?

26m 51s

Comments in Javascript

13m 5s

Assignment : Introduction to JavaScript

3m 10s

Quiz : Introduction to JavaScript

13m

JavaScript Variables

32m 32s

JavaScript global variable

16m 14s

Primitive Data Types in JavaScript

26m 30s

JavaScript Non Primitive Datatypes

15m 32s

JavaScript arithmetic operators

17m 39s

JavaScript Comparison Operators

11m 32s

JavaScript Bitwise

29m 58s

Javascript Logical Operator

10m 39s

Javascript Assignment Operator

10m 26s

Special JavaScript Operators

24m 56s

JavaScript if/else Statement

25m 4s

JavaScript switch Statement

24m 31s

JavaScript do/while Statement

25m 49s

JavaScript for/in Statement

23m 27s

JavaScript Functions

22m 54s

JavaScript Function call()

30m 8s

JavaScript bind () vs apply () and call ()

31m 25s

Assignment : JavaScript Basics 1

7m 37s

Assignment : JavaScript Basics 2

8m 1s

Quiz : JavaScript Basics

38m

Javascript Objects

28m 2s

JavaScript Window - The Browser Object Model

8m 28s

Javascript BOM - Window Object

21m 39s

Javascript BOM - History Object

18m 4s

Javascript BOM - Navigator object

13m 25s

Javascript BOM - Screen Object

9m 48s

Assignment : Browser Object Model

5m 37s

Quiz : Browser Object Model

41m

Javascript Document Object Model - DOM

17m 36s

Javascript Document Object Methods

29m 43s

Assignment : Document Object Model

6m 48s

Quiz : Document Object Model

Javascript Form Validations

29m 6s

Javascript Email Validations

13m 28s

Assignment : JavaScript Validation

3m 35s

Quiz : JavaScript Validation

JavaScript Cookies

23m 11s

Javascript Cookies Example

18m 21s

JavaScript Cookie Attributes

20m 20s

JavaScript Cookie with multiple Names

21m 39s

JavaScript Deleting a Cookie

15m 48s

Assignment : JavaScript Cookies

3m 30s

Quiz : JavaScript Cookies

13m

Javascript Events

32m 49s

Javascript AddEventListner ()

20m 44s

Javascript Click Events

10m 28s

Javascript Double Click Event

12m 41s

Onload event in Javascript

19m 33s

OnResize Event in Javascript

20m 3s

Assignment : Events in JavaScript

4m 43s

Quiz : Events In JavaScript

26m

Career Guideline

JavaScript Interview Question

20m 32s

Course Summary

2m 41s

JavaScript global variable

Javascript For Web Designers JavaScript Basics

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Discussion

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2.2 global_variable_with_window_object

Course Content

Introduction to Javascript

20m 47s

How to use LearnVern

3m 20s

Javascript Features

17m 46s

Ways to write and Add Javascript code?

26m 51s

Comments in Javascript

13m 5s

Assignment : Introduction to JavaScript

3m 10s

JavaScript Variables

32m 32s

JavaScript global variable

16m 14s

Primitive Data Types in JavaScript

26m 30s

JavaScript Non Primitive Datatypes

15m 32s

JavaScript arithmetic operators

17m 39s

JavaScript Comparison Operators

11m 32s

JavaScript Bitwise

29m 58s

Javascript Logical Operator

10m 39s

Javascript Assignment Operator

10m 26s

Special JavaScript Operators

24m 56s

JavaScript if/else Statement

25m 4s

JavaScript switch Statement

24m 31s

JavaScript do/while Statement

25m 49s

JavaScript for/in Statement

23m 27s

JavaScript Functions

22m 54s

JavaScript Function call()

30m 8s

JavaScript bind () vs apply () and call ()

31m 25s

Assignment : JavaScript Basics 1

7m 37s

Assignment : JavaScript Basics 2

8m 1s

Javascript Objects

28m 2s

JavaScript Window - The Browser Object Model

8m 28s

Javascript BOM - Window Object

21m 39s

Javascript BOM - History Object

18m 4s

Javascript BOM - Navigator object

13m 25s

Javascript BOM - Screen Object

9m 48s

Assignment : Browser Object Model

5m 37s

Javascript Document Object Model - DOM

17m 36s

Javascript Document Object Methods

29m 43s

Assignment : Document Object Model

6m 48s

Javascript Form Validations

29m 6s

Javascript Email Validations

13m 28s

Assignment : JavaScript Validation

3m 35s

JavaScript Cookies

23m 11s

Javascript Cookies Example

18m 21s

JavaScript Cookie Attributes

20m 20s

JavaScript Cookie with multiple Names

21m 39s

JavaScript Deleting a Cookie

15m 48s

Assignment : JavaScript Cookies

3m 30s

Javascript Events

32m 49s

Javascript AddEventListner ()

20m 44s

Javascript Click Events

10m 28s

Javascript Double Click Event

12m 41s

Onload event in Javascript

19m 33s

OnResize Event in Javascript

20m 3s

Assignment : Events in JavaScript

4m 43s

Career Guideline

JavaScript Interview Question

20m 32s

Course Summary

2m 41s

FAQs

Local variables are saved within a function using var for use exclusively within that function's scope, whereas global variables are declared outside of a function for accessible across the programme.

In JavaScript, global variables should be avoided or used sparingly. This is because other scripts can easily overwrite global variables. Global variables aren't necessarily bad or even dangerous, but they shouldn't overwrite the values of other variables.

One advantage is that they are simple to overwrite in various locations because they are widely available. Because global variables are window object properties, they can also overwrite anything in the window object. These are actual challenges that make our code difficult to understand.