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Best JavaScript Courses to Learn in 20-22

Best JavaScript online courses for both beginners and experienced web developers and designers as well.

The JavaScript is the most popular scripting languages and it developed by Netscape and used to develop the client-side web applications.


Try Free JavaScript Essential Training for beginners and experienced

https://www.linkedin.com/learning/javascript-essential-training/javascript-the-soil-from-which-the-modern-web-grows

https://www.code-sample.com/2015/04/javascript-interview-questions-answers.html

 

If you want JavaScript paid courses try the below link,

https://www.udemy.com/topic/javascript/free/

 

What is the difference between let, var, and const?

I’m explaining the importance of these three keywords in JavaScript.   

Let see the detail about the - var vs. let vs. const

var: -

1.      var is function-scoped

2.      var returns undefined when accessing a variable before it's declared

 

let: -

1.      let is block-scoped

2.      let throw ReferenceError when accessing a variable before it's declared

 

const:-

1.      Const is block-scoped

2.      Const throw ReferenceError when accessing a variable before it's declared

3.      Const cannot be reassigned

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