Guide-for-JavaScript

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An Introduction to JavaScript
Definition of JavaScript JavaScript is a
scripting language or programming language that
allows you to implement complex things on web
pages each time a web page displays more than
just static information. - You can bet that
JavaScript is probably involved. It is the third
layer of layer cake covered by standard web
technologies, two of which (HTML and CSS) we have
in other parts of the learning area much more
detailed. HTML is the markup language we use to
structure and make sense of our web content, such
as defining paragraphs, headings, and data
tables, or embedding images and videos into the
page. CSS is a language of style rules that we
use to apply styling to our HTML content, such as
setting background colors and fonts, and
defining our content in multiple
columns. JavaScript is a scripting language that
allows you to dynamically update content, control
multimedia, animate images, and create almost
anything else. (Okay, not all, but it's amazing
what you can achieve with a few lines of
JavaScript code.) Why JavaScript? When
JavaScript was created, it first had a different
name "LiveScript". But Java was very popular at
that time, so it was decided that positioning a
new language as a "younger brother" of Java would
help. But as it developed, was JavaScript, a
completely independent language with its own
specification called ECMAScript, and now It has
no relationship at all to Java.
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What does JavaScript do on your page? Here we
start to look at a code and explore what happens
when you run JavaScript on your page. Let's
briefly tell the story of what happens when you
load a web page into a browser (first in our
article how CSS works). When you load a web page
in your browser, run your code (HTML, CSS, and
JavaScript) in an execution environment
(Browser-tab). This is like a factory that takes
raw materials (the code) and a product (the
site). The JavaScript is executed by the
browser's JavaScript engine after HTML and CSS
have been assembled and merged into a web page.
This ensures that the structure and style of the
page already exists when the JavaScript
starts. This is a good thing, because a very
common use of JavaScript is to change the HTML
and CSS dynamically to update a user interface
via the Document Object Model API (as mentioned
above). If the JavaScript loaded and tried to
run before the HTML and CSS were there to affect
then error would occur. Browser Security This
means that in most cases the code in each tab is
completely separated and the code in one tab
cannot directly affect the code in another tab-or
on another website. This is a good security
measure if not, Pirates could write code to
steal information from other sites, and others
such bad things. What makes JavaScript
unique? There are at least three great things
about JavaScript Full integration with HTML /
CSS. Simple things are made easy. Support by all
popular browsers and enabled by
default. Javascript is the only browser
technology that combines these three things. This
makes JavaScript unique. Therefore, it is the
most widely used tool for creating browser
interfaces. While you are planning to learn a new
technology, it is beneficial to review your
prospects. So let's go to the modern trends that
affect it, including new languages and browser
capabilities. For more detailshttps//www.exlte
ch.in/