What is JavaScript where to? | Where do I write my JavaScript?

What is JavaScript where to?
Where do I write my JavaScript?
Where should I put my JavaScript?
जावास्क्रिप्ट क्या है कहां जाना है?
JavaScript Where To
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JavaScript, also abbreviated to JS, is a programming language used in web development. As one of the core technologies of the web alongside HTML and CSS, JavaScript is used to make webpages interactive and to build web apps. Modern web browsers, which adhere to common display standards, support JavaScript through built-in engines without the need for additional plugins.

When working with files for the web, JavaScript needs to be loaded and run alongside HTML markup. This can be done either inline within an HTML document or in a separate file that the browser will download alongside the HTML document.

This tutorial will go over how to incorporate JavaScript into your web files, both inline into an HTML document and as a separate file.

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In HTML, JavaScript code is inserted between script and /script tags.

Old JavaScript examples may use a type attribute: script type="text/javascript".
The type attribute is not required. JavaScript is the default scripting language in HTML.

JavaScript Functions and Events

A JavaScript function is a block of JavaScript code, that can be executed when "called" for.

For example, a function can be called when an event occurs, like when the user clicks a button.

You will learn much more about functions and events in later chapters.

You will learn much more about functions and events in later chapters.

JavaScript in head or body
You can place any number of scripts in an HTML document.

Scripts can be placed in the body, or in the head section of an HTML page, or in both.

JavaScript in head
In this example, a JavaScript function is placed in the head section of an HTML page.

The function is invoked (called) when a button is clicked:

function myFunction() {
}

Placing scripts at the bottom of the body element improves the display speed, because script interpretation slows down the display.

External JavaScript
Scripts can also be placed in external files:

function myFunction() {
}

External scripts are practical when the same code is used in many different web pages.

JavaScript files have the file extension .js.

To use an external script, put the name of the script file in the src (source) attribute of a script tag:

You can place an external script reference in head or body as you like.

The script will behave as if it was located exactly where the script tag is located.

External scripts cannot contain script tags.

External JavaScript Advantages
Placing scripts in external files has some advantages:

It separates HTML and code
It makes HTML and JavaScript easier to read and maintain
Cached JavaScript files can speed up page loads
To add several script files to one page - use several script tags:

External References
An external script can be referenced in 3 different ways:

With a full URL (a full web address)
With a file path (like /js/)
Without any path

JavaScript Tutorial In Hindi
JavaScript एसईओ से जुड़ी बुनियादी बातें समझना
JavaScript Tutorials for Beginners in Hindi
Javascript in 1 shot in Hindi | part 1
What is JavaScript where to?
What is JavaScript in Hindi with an example?
Where to write JavaScript?
जावास्क्रिप्ट क्या है कहां जाना है?

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