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LEARNING JAVASCRIPT PART- 1

LEARNING JAVASCRIPT PART- 1 

JavaScript is a very powerful, versatile, and popular programming language. Infact it is the de facto programming language of the web so you can find it anywhere from your smart phone to your pc .It was first arrived in the mid-1990s; it is grown to be one of the world's most popular programming languages.

If you want to learn the web development, it is a must have learned language for you. Also it is in top 5 language to learn this year so, I have decided to start a series to cover basics of JavaScript before we move to the advance topics.

Topics we are going to cover in this series are;

1.       Using JavaScript in HTML File and Browser Console
2.       Variables in JavaScript
3.       Operators
4.       Arrays
5.       Objects in JavaScript
6.       Functions
7.       Loops and Jumps
8.      The Document Object Model

So in this part we are going to set up environment for learning JavaScript so let’s get started…,

Using JavaScript in HTML File and Browser Console

Opening console in browser window


To activate Developer Tools in your browser depending on the browser and operating system we can,

Chrome

On Windows and Linux, press Control+ Shift+
J.
On Mac, press cmd +Opt + J.

Firefox

Windows and Linux, press Control +Shift+ K.
On Mac Cmd + shift + J.

Internet Explorer

Press F12.



For other browsers ,just Google it :).
In Opened console window  type in this line
alert("Hello World!");

This must open up a pop up saying "Hello World!".We learn about alert(); in function later on.

You can also do mathematical calculations like this;


Using JavaScript in HTML File


Console is for just quick testing or for learning to do something on very basic level but in actual use JavaScript is written in a HTML file or is linked to it .To do so HTML provides a <script>tag, inside of which we can write our JavaScript code.

Let’s have an example of it,

<!doctype html>
<html>
<head>
<title>Example title>

<script>
// our JS code will be written here as below..
alert("Hello World!"); //alert message pop  up
</script>
</head>
<body>
</body>
</html>

This piece of code will produce a pop up window saying Hello world .

Here ‘//’ mean that we are writing a comment which have nothing to do with our program so the browser will not execute it while running our code.

’// ‘ are used to write single line comments .

// Single Line Comment

For writing a multi line comment just do this,
/*
Multi

Line

Comment
*/


Next we will be going to learn about variables in javascript.






Labels:

Comments

  1. Tanyi Melvis Bechemnyo6 May 2017 at 22:02

    Wow! Thanks for that sweet intro, I have a om html and css, but no time to continue to Js. This just makes me want to continue asap.

    ReplyDelete
  2. Dee studio7 May 2017 at 00:51

    Thankyou Tanyi Melvis Bechemnyo I love JS a lot...i am just completing the series offline soon publish other parts
    oh and you are the first one to comment on deecoder special thanks for that

    ReplyDelete
  3. Dee studio7 May 2017 at 00:52

    Thankyou Tanyi Melvis Bechemnyo I love JS a lot...i am just completing the series offline soon publish other parts
    oh and you are the first one to comment on deecoder special thanks for that

    ReplyDelete
  4. Unknown8 May 2017 at 09:23

    I studied JS at University *snores* I'm more of a creative soul who hasn't looked at it since and that over a decade ago. But my husband would be really interested in this so I'm going to pass your blog address along! Can I just say that I love your simple layout but I struggled to read the heading of your blog post in the script (only because I'm quite tired now and it actually made my eyeballs shade, it's gross and it's a connective tissue thing, but it's just incase other people struggle to read it too). Keep up the really informative posts!
    Claire - startacraftblog.com

    ReplyDelete
    Replies
    1. Dee studio8 May 2017 at 09:36

      Thank you so so much for your review and passing my blog address along thankyou so much. sorry for heading

      Delete
  5. Kaylee23 May 2017 at 08:08

    This kind of stuff is always way over my head, you have an easy to follow description. Thank you for this.

    ReplyDelete
    Replies
    1. Dee studio25 May 2017 at 21:17

      Thankyou kaylee i am about to finish writing the rest of series(just going to upload it on next week or so) I hope you like it

      Delete

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