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<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="JS Doc.css">
<title>JS Documentation</title>
</head>
<body>
<div class="container">
<nav id="navbar">
<header>JS Documentation</header>
<hr style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<ul>
<li>
<a href="#Introduction" class="nav-link">Introduction</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#What_you_should_know" class="nav-link">What you should know</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#JavaScript_and_Java" class="nav-link">JavaScript and Java</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Hello_world" class="nav-link">Hello world</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Variables" class="nav-link">Variables</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Declaring_variables" class="nav-link">Declaring variables</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Variable_scope" class="nav-link">Variable scope</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Global_variables" class="nav-link">Global variables</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Constants" class="nav-link">Constants</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Data_types" class="nav-link">Data types</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#If...else_statement" class="nav-link">If...else statement</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#while_statement" class="nav-link">while statement</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Function_declarations" class="nav-link">Function declarations</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
<li>
<a href="#Reference" class="nav-link">Reference</a>
</li>
<hr
style="border: none; height: 3px; background: linear-gradient(to right, #FD74FD, #FA39EE, #CE1DB9);">
</ul>
</nav>
<main id="main-doc">
<section class="main-section" id="Introduction">
<header>Introduction</header>
<article>
<p>
JavaScript is a cross-platform, object-oriented scripting language.
It is a small and lightweight language. Inside a host environment
(for example, a web browser), JavaScript can be connected to the
objects of its environment to provide programmatic control over
them.
</p>
<p>
JavaScript contains a standard library of objects, such as Array,
Date, and Math, and a core set of language elements such as
operators, control structures, and statements. Core JavaScript can
be extended for a variety of purposes by supplementing it with
additional objects; for example:
</p>
<ul>
<li>
<::marker></::marker>
Client-side JavaScript extends the core language by supplying
objects to control a browser and its Document Object Model (DOM).
For example, client-side extensions allow an application to place
elements on an HTML form and respond to user events such as mouse
clicks, form input, and page navigation.
</li>
<li>
<::marker></::marker>
Server-side JavaScript extends the core language by supplying
objects relevant to running JavaScript on a server. For example,
server-side extensions allow an application to communicate with a
database, provide continuity of information from one invocation to
another of the application, or perform file manipulations on a
server.
</li>
</ul>
</article>
</section>
<section class="main-section" id="What_you_should_know">
<header>What you should know</header>
<article>
<p>This guide assumes you have the following basic background:</p>
<ul>
<li>
A general understanding of the Internet and the World Wide Web (WWW).
</li>
<li>
Good working knowledge of HyperText Markup Language (HTML).
</li>
<li>
Some programming experience. If you are new to programming, try one of the tutorials linked
on
the main page about JavaScript.
</li>
</ul>
</article>
</section>
<section class="main-section" id="JavaScript_and_Java">
<header>JavaScript and Java</header>
<article>
<p>
JavaScript and Java are similar in some ways but fundamentally different in some others. The
JavaScript language resembles Java but does not have Java's static typing and strong type
checking.
JavaScript follows most Java expression syntax, naming conventions
and basic control-flow constructs which was the reason why it was renamed from LiveScript to
JavaScript.
</p>
<p>
In contrast to Java's compile-time system of classes built by declarations, JavaScript supports
a
runtime system based on a small number of data types representing numeric, Boolean, and string
values. JavaScript has a prototype-based object model instead
of the more common class-based object model. The prototype-based model provides dynamic
inheritance;
that is, what is inherited can vary for individual objects. JavaScript also supports functions
without any special declarative requirements.
Functions can be properties of objects, executing as loosely typed methods.
</p>
<p>
JavaScript is a very free-form language compared to Java. You do not have to declare all
variables,
classes, and methods. You do not have to be concerned with whether methods are public, private,
or
protected, and you do not have to implement interfaces.
Variables, parameters, and function return types are not explicitly typed.
</p>
</article>
</section>
<section class="main-section" id="Hello_world">
<header>Hello world</header>
<article>
To get started with writing JavaScript, open the Scratchpad and write your first "Hello world"
JavaScript code:
<code>function greetMe(yourName) { alert("Hello " + yourName); }
greetMe("World");
</code> Select the code in the pad and hit Ctrl+R to watch it unfold in your browser!
</article>
</section>
<section class="main-section" id="Variables">
<header>Variables</header>
<p>
You use variables as symbolic names for values in your application. The names of variables, called
identifiers, conform to certain rules.
</p>
<p>
A JavaScript identifier must start with a letter, underscore (_), or dollar sign ($); subsequent
characters can also be digits (0-9). Because JavaScript is case sensitive, letters include the
characters "A" through "Z" (uppercase) and the characters "a"
through "z" (lowercase).
</p>
<p>
You can use ISO 8859-1 or Unicode letters such as å and ü in identifiers. You can also use the
Unicode
escape sequences as characters in identifiers. Some examples of legal names are Number_hits, temp99,
and
_name.
</p>
</section>
<section class="main-section" id="Declaring_variables">
<header>Declaring variables</header>
<article>
You can declare a variable in three ways:
<p>
With the keyword var. For example, <code>var x = 42.</code> This syntax can be used to declare
both local and global variables.
</p>
<p>
By simply assigning it a value. For example,
<code>x = 42.</code> This always declares a global variable. It generates a strict JavaScript
warning. You shouldn't use this variant.
</p>
<p>
With the keyword let. For example,<code> let y = 13.</code> This syntax can be used to declare a
block scope local variable. See Variable scope below.
</p>
</article>
</section>
<section class="main-section" id="Variable_scope">
<header>Variable scope</header>
<article>
<p>
When you declare a variable outside of any function, it is called a global variable, because it
is
available to any other code in the current document. When you declare a variable within a
function,
it is called a local variable, because it is available
only within that function.
</p>
<p>
JavaScript before ECMAScript 2015 does not have block statement scope; rather, a variable
declared
within a block is local to the function (or global scope) that the block resides within. For
example
the following code will log 5, because the scope of
x is the function (or global context) within which x is declared, not the block, which in this
case
is an if statement.
</p>
<code>if (true) { var x = 5; } console.log(x); // 5</code>
<p>
This behavior changes, when using the let declaration introduced in ECMAScript 2015.
</p>
<code>if (true) { let y = 5; } console.log(y); // ReferenceError: y is
not defined</code>
</article>
</section>
<section class="main-section" id="Global_variables">
<header>Global variables</header>
<article>
<p>
Global variables are in fact properties of the global object. In web pages the global object is
window, so you can set and access global variables using the window.variable syntax.
</p>
<p>
Consequently, you can access global variables declared in one window or frame from another
window or
frame by specifying the window or frame name. For example, if a variable called phoneNumber is
declared in a document, you can refer to this variable
from an iframe as parent.phoneNumber.
</p>
</article>
</section>
<section class="main-section" id="Constants">
<header>Constants</header>
<article>
<p>
You can create a read-only, named constant with the const keyword. The syntax of a constant
identifier is the same as for a variable identifier: it must start with a letter, underscore or
dollar sign and can contain alphabetic, numeric, or underscore
characters.
</p>
<code>const PI = 3.14;</code>
<p>
A constant cannot change value through assignment or be re-declared while the script is running.
It
has to be initialized to a value.
</p>
<p>
The scope rules for constants are the same as those for let block scope variables. If the const
keyword is omitted, the identifier is assumed to represent a variable.
</p>
<p>
You cannot declare a constant with the same name as a function or variable in the same scope.
For
example:
</p>
<code>// THIS WILL CAUSE AN ERROR function f() {}; const f = 5; // THIS
WILL CAUSE AN ERROR ALSO function f() { const g = 5; var g;
//statements }</code> However, object attributes are not protected, so the following statement
is
executed without problems.
<code>const MY_OBJECT = {"key": "value"}; MY_OBJECT.key =
"otherValue";</code>
</article>
</section>
<section class="main-section" id="Data_types">
<header>Data types</header>
<article>
<p>
The latest ECMAScript standard defines seven data types:
</p>
<ul>
<li>
<p>Six data types that are primitives:</p>
<ul>
<li>
Boolean. true and false.
</li>
<li>
null. A special keyword denoting a null value. Because JavaScript is case-sensitive,
null is not the same as Null, NULL, or any other variant.
</li>
<li>
undefined. A top-level property whose value is undefined.
</li>
<li>
Number. 42 or 3.14159.
</li>
<li>
String. "Howdy"
</li>
<li>
Symbol (new in ECMAScript 2015). A data type whose instances are unique and
immutable.
</li>
</ul>
</li>
<li>
and Object
</li>
</ul>
Although these data types are a relatively small amount, they enable you to perform useful functions
with your applications. Objects and functions are the other fundamental elements in the language.
You
can think of objects as named containers for values,
and functions as procedures that your application can perform.F
</article>
</section>
<section class="main-section" id="If...else_statement">
<header>if...else statement</header>
<article>
Use the if statement to execute a statement if a logical condition is true. Use the optional else
clause
to execute a statement if the condition is false. An if statement looks as follows:
<code>if (condition) { statement_1; } else { statement_2; }</code> condition can be any expression
that
evaluates to true or false. See Boolean for an explanation of what evaluates to true and false. If
condition evaluates to true, statement_1
is executed; otherwise, statement_2 is executed. statement_1 and statement_2 can be any statement,
including further nested if statements.
<p>
You may also compound the statements using else if to have multiple conditions tested in
sequence,
as follows:
</p>
<code>if (condition_1) { statement_1; } else if (condition_2) {
statement_2; } else if (condition_n) { statement_n; } else {
statement_last; }
</code> In the case of multiple conditions only the first logical condition which evaluates to
true
will be executed. To execute multiple statements, group them within a block statement ({ ... }) . In
general, it's good practice
to always use block statements, especially when nesting if statements:
<code>if (condition) { statement_1_runs_if_condition_is_true;
statement_2_runs_if_condition_is_true; } else {
statement_3_runs_if_condition_is_false;
statement_4_runs_if_condition_is_false; }</code> It is advisable to not use simple assignments
in a
conditional expression, because the assignment can be confused with equality when glancing over the
code. For example, do not
use the following code:
<code>if (x = y) { /* statements here */ }</code> If you need to use an assignment in a conditional
expression, a common practice is to put additional parentheses around the assignment. For example:
<code>if ((x = y)) { /* statements here */ }</code>
</article>
</section>
<section class="main-section" id="while_statement">
<header>while statement</header>
<article>
A while statement executes its statements as long as a specified condition evaluates to true. A
while
statement looks as follows:
<code>while (condition) statement</code> If the condition becomes false, statement within the loop
stops
executing and control passes to the statement following the loop.
<p>
The condition test occurs before statement in the loop is executed. If the condition returns
true,
statement is executed and the condition is tested again. If the condition returns false,
execution
stops and control is passed to the statement following
while.
</p>
<p>
To execute multiple statements, use a block statement ({ ... }) to group those statements.
</p>
Example
<p>
The following while loop iterates as long as n is less than three:
</p>
<code>var n = 0; var x = 0; while (n < 3) { n++; x += n; }</code>
<p>
With each iteration, the loop increments n and adds that value to x. Therefore, x and n take on
the
following values:
</p>
<ul>
<li>After the first pass: n = 1 and x = 1</li>
<li>After the second pass: n = 2 and x = 3</li>
<li>After the third pass: n = 3 and x = 6</li>
</ul>
<p>
After completing the third pass, the condition n < 3 is no longer true, so the loop
terminates.
</p>
</article>
</section>
<section class="main-section" id="Function_declarations">
<header>Function declarations</header>
<article>
A function definition (also called a function declaration, or function statement) consists of the
function keyword, followed by:
<ul>
<li>
The name of the function.
</li>
<li>
A list of arguments to the function, enclosed in parentheses and separated by commas.
</li>
<li>
The JavaScript statements that define the function, enclosed in curly brackets, { }.
</li>
</ul>
<p>
For example, the following code defines a simple function named square:
</p>
<code>function square(number) { return number * number; }</code>
<p>
The function square takes one argument, called number. The function consists of one statement
that
says to return the argument of the function (that is, number) multiplied by itself. The return
statement specifies the value returned by the function.
</p>
<code>return number * number;</code>
<p>
Primitive parameters (such as a number) are passed to functions by value; the value is passed to
the
function, but if the function changes the value of the parameter, this change is not reflected
globally or in the calling function.
</p>
</article>
</section>
<section class="main-section" id="Reference">
<header>Reference</header>
<article>
<ul>
<li>
All the documentation in this page is taken from
<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide" target="_blank">MDN</a>
</li>
</ul>
</article>
</section>
</main>
</div>
</body>
</html>
@media (max-width: 600px) {
@import url('https://fonts.googleapis.com/css2?family=Gloria+Hallelujah&family=Goldman:wght@400;700&family=Kanit:ital,wght@0,100;0,200;0,250;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,250;1,400;1,500;1,600;1,700;1,800;1,900&family=Montserrat:ital,wght@0,100..900;1,100..900&family=Pirata+One&family=Poppins:ital,wght@0,100;0,200;0,250;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,250;1,400;1,500;1,600;1,700;1,800;1,900&family=Rubik+Vinyl&family=Squada+One&family=Syne+Mono&display=swap');
* {
font-family: "Poppins", "Montserrat", "Rubik Vinyl", "Kanit", "Goldman", "Pirata One", "Squada One", "Syne Mono", "Gloria Hallelujah";
margin: 0;
padding: 0;
color: rgb(192, 184, 184);
background-color: rgb(37, 36, 36);
}
head {
display: none;
}
html, body {
min-width: 290px;
color: #4d4e53;
background-color: #ffffff;
font-family: 'Open Sans', Arial, sans-serif;
line-height: 1.5;
}
body {
display: block;
margin: 8px;
}
#navbar {
width: 200px;
background-color: #1e1e1e;
color: #fff;
padding: 15px;
box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
position: fixed;
}
#navbar {
padding: 20px;
position: fixed;
min-width: 290px;
top: 0px;
left: 0px;
width: 300px;
height: 100%;
border-right: solid;
border-color: rgba(0, 22, 22, 0.4);
}
header {
padding: 25px 25px;
text-align: center;
}
#navbar li {
list-style-type: none;
padding: 10px 10px;
}
nav {
display: block;
unicode-bidi: isolate;
background-color: #CE1DB9;
}
#main-doc {
position: absolute;
margin-left: 310px;
padding: 20px;
margin-bottom: 110px;
}
.page-container {
display: flex;
height: 100vh;
}
#navbar {
width: 200px;
background-color: #1e1e1e;
color: #fff;
padding: 15px;
box-shadow: 2px 0 5px rgba(0, 0, 0, 0.2);
}
#navbar ul {
list-style-type: none;
padding: 0;
}
#navbar ul li {
margin: 10px 0;
}
#navbar ul li a {
text-decoration: none;
color: #fff;
transition: color 0.3s;
}
#navbar ul li a:hover {
color: #fa39ee;
}
#main-doc header {
text-align: left;
margin: 0px;
}
header {
font-weight: bold;
font-size: 1.5em;
margin: 10px;
text-align: center;
}
section article {
color: #4d4e53;
margin: 15px;
font-size: 0.96em;
}
ul {
display: block;
list-style-type: disc;
margin-block-start: 1em;
margin-block-end: 1em;
margin-inline-start: 0px;
margin-inline-end: 0px;
padding-inline-start: 40px;
unicode-bidi: isolate;
}
li {
display: list-item;
text-align: -webkit-match-parent;
unicode-bidi: isolate;
}
section li {
margin: 15px 0px 0px 20px;
}
::marker {
unicode-bidi: isolate;
font-variant-numeric: tabular-nums;
text-transform: none;
text-indent: 0px !important;
text-align: start !important;
text-align-last: start !important;
}
code {
display: block;
text-align: left;
white-space: pre-line;
position: relative;
word-break: normal;
word-wrap: normal;
line-height: 2;
background-color: #f7f7f7;
padding: 15px;
margin: 10px;
border-radius: 5px;
}
p {
display: block;
margin-block-start: 1em;
margin-block-end: 1em;
margin-inline-start: 0px;
margin-inline-end: 0px;
unicode-bidi: isolate;
}
/* Default styles (for larger screens) */
.navbar {
display: flex;
justify-content: space-around;
}
@media (max-width: 600px) {
.navbar {
flex-direction: column;
align-items: center;
}
}
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