JavaScript Basics - Revision history

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	= JavaScript Basics =		== JavaScript Basics ==

	=== Variables ===		=== Variables ===

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	=== Variables ===		=== Variables ===
	Variables.<ref>{{Citation \|title=Variable (computer science) \|date=2022-08-19 \|url=https://en.wikipedia.org/w/index.php?title=Variable_(computer_science)&oldid=1105315140 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> are data stored as a value in a named space. Variables can be used as a mathematical constant<ref>{{Citation \|title=Constant (mathematics) \|date=2022-06-02 \|url=https://en.wikipedia.org/w/index.php?title=Constant_(mathematics)&oldid=1091159181 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>, to use in math commands to generate a user output<ref name=":0">{{Citation \|title=Input/output \|date=2022-08-28 \|url=https://en.wikipedia.org/w/index.php?title=Input/output&oldid=1107158004 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>, such as e<ref>{{Citation \|title=e (mathematical constant) \|date=2022-08-26 \|url=https://en.wikipedia.org/w/index.php?title=E_(mathematical_constant)&oldid=1106854025 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>, which has a value of 2.718281828459045. To declare a new constant, type the keyword "const"<ref>{{Citation \|title=const (computer programming) \|date=2022-08-20 \|url=https://en.wikipedia.org/w/index.php?title=Const_(computer_programming)&oldid=1105407141 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>, and add the [[JavaScript syntax#Declaration and assignment\|assignment declaration]]. Add the value to declare the constant. Note that constants cannot be changed afterward, which should be self-explanatory. Normal variables work the same way, and can be changed accordingly depending on user input. Variables can also hold strings<ref>{{Citation \|title=String (computer science) \|date=2022-08-01 \|url=https://en.wikipedia.org/w/index.php?title=String_(computer_science)&oldid=1101756832 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>, which is useful for input such as authorization<ref>{{Citation \|title=Authorization \|date=2022-08-18 \|url=https://en.wikipedia.org/w/index.php?title=Authorization&oldid=1105166484 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> or for a search engine<ref>{{Citation \|title=Search engine \|date=2022-08-28 \|url=https://en.wikipedia.org/w/index.php?title=Search_engine&oldid=1107150189 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>. Variables can also identify as undefined<ref>{{Citation \|title=Undefined value \|date=2021-12-09 \|url=https://en.wikipedia.org/w/index.php?title=Undefined_value&oldid=1059485044 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> or null<ref>{{Citation \|title=Null character \|date=2022-08-10 \|url=https://en.wikipedia.org/w/index.php?title=Null_character&oldid=1103680343 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>		Variables<ref>{{Citation \|title=Variable (computer science) \|date=2022-08-19 \|url=https://en.wikipedia.org/w/index.php?title=Variable_(computer_science)&oldid=1105315140 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> are data stored as a value in a named space. Variables can be used as a mathematical constant,<ref>{{Citation \|title=Constant (mathematics) \|date=2022-06-02 \|url=https://en.wikipedia.org/w/index.php?title=Constant_(mathematics)&oldid=1091159181 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> to use in math commands to generate a user output,<ref name=":0">{{Citation \|title=Input/output \|date=2022-08-28 \|url=https://en.wikipedia.org/w/index.php?title=Input/output&oldid=1107158004 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> such as e,<ref>{{Citation \|title=e (mathematical constant) \|date=2022-08-26 \|url=https://en.wikipedia.org/w/index.php?title=E_(mathematical_constant)&oldid=1106854025 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> which has a value of 2.718281828459045. To declare a new constant, type the keyword "const",<ref>{{Citation \|title=const (computer programming) \|date=2022-08-20 \|url=https://en.wikipedia.org/w/index.php?title=Const_(computer_programming)&oldid=1105407141 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> and add the [[JavaScript syntax#Declaration and assignment\|assignment declaration]]. Add the value to declare the constant. Note that constants cannot be changed afterward, which should be self-explanatory. Normal variables work the same way, and can be changed accordingly depending on user input. Variables can also hold strings,<ref>{{Citation \|title=String (computer science) \|date=2022-08-01 \|url=https://en.wikipedia.org/w/index.php?title=String_(computer_science)&oldid=1101756832 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> which is useful for input such as authorization<ref>{{Citation \|title=Authorization \|date=2022-08-18 \|url=https://en.wikipedia.org/w/index.php?title=Authorization&oldid=1105166484 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> or for a search engine.<ref>{{Citation \|title=Search engine \|date=2022-08-28 \|url=https://en.wikipedia.org/w/index.php?title=Search_engine&oldid=1107150189 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> Variables can also identify as undefined<ref>{{Citation \|title=Undefined value \|date=2021-12-09 \|url=https://en.wikipedia.org/w/index.php?title=Undefined_value&oldid=1059485044 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> or null.<ref>{{Citation \|title=Null character \|date=2022-08-10 \|url=https://en.wikipedia.org/w/index.php?title=Null_character&oldid=1103680343 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>

	=== Functions ===		=== Functions ===
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	=== Event Keywords ===		=== Event Keywords ===
	[[Event (computing)\|Events]] is a trigger usually initiated by user input<ref name=":0" />, which allows certain blocks of code to execute. Here's a [[HTML attribute#Event attributes\|complete list]].		[[Event (computing)\|Events]] is a trigger usually initiated by user input,<ref name=":0" /> which allows certain blocks of code to execute. Here's a [[HTML attribute#Event attributes\|complete list]].

	=== WebSockets and User Connections ===		=== WebSockets and User Connections ===
	User connections include social networking<ref>{{Citation \|title=Social networking service \|date=2022-08-22 \|url=https://en.wikipedia.org/w/index.php?title=Social_networking_service&oldid=1105837230 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>, messaging between users<ref>{{Citation \|title=Message \|date=2022-07-26 \|url=https://en.wikipedia.org/w/index.php?title=Message&oldid=1100585875 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>, or playing an online game<ref>{{Citation \|title=Multiplayer video game \|date=2022-08-12 \|url=https://en.wikipedia.org/w/index.php?title=Multiplayer_video_game&oldid=1104068378 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>. WebSocket<ref>{{Citation \|title=WebSocket \|date=2022-08-06 \|url=https://en.wikipedia.org/w/index.php?title=WebSocket&oldid=1102718692 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> is a protocol used for seamless and fast communication listening on a port<ref>{{Citation \|title=Port (computer networking) \|date=2022-08-04 \|url=https://en.wikipedia.org/w/index.php?title=Port_(computer_networking)&oldid=1102379124 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>. Encoded messages are sent over this line, usually in a JSON format<ref>{{Citation \|title=JSON \|date=2022-08-25 \|url=https://en.wikipedia.org/w/index.php?title=JSON&oldid=1106610160 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref>. WebSocket is supported by [[Google Chrome]], [[Firefox]], [[Safari (web browser)\|Safari]], [[Microsoft Edge]], [[Internet Explorer]], and [[Opera (web browser)\|Opera]]. This server can be utilized with a variable. Declare a variable and set the value to "new WebSocket()". Inside of the parentheses put the [[URL\|URL (Uniform Resource Locator)]] of your WebSocket connection. Create custom functions for this to create a [[Instant messaging\|chat application]] or another idea.		User connections include social networking,<ref>{{Citation \|title=Social networking service \|date=2022-08-22 \|url=https://en.wikipedia.org/w/index.php?title=Social_networking_service&oldid=1105837230 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> messaging between users,<ref>{{Citation \|title=Message \|date=2022-07-26 \|url=https://en.wikipedia.org/w/index.php?title=Message&oldid=1100585875 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> or playing an online game.<ref>{{Citation \|title=Multiplayer video game \|date=2022-08-12 \|url=https://en.wikipedia.org/w/index.php?title=Multiplayer_video_game&oldid=1104068378 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> WebSocket<ref>{{Citation \|title=WebSocket \|date=2022-08-06 \|url=https://en.wikipedia.org/w/index.php?title=WebSocket&oldid=1102718692 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> is a protocol used for seamless and fast communication listening on a port.<ref>{{Citation \|title=Port (computer networking) \|date=2022-08-04 \|url=https://en.wikipedia.org/w/index.php?title=Port_(computer_networking)&oldid=1102379124 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> Encoded messages are sent over this line, usually in a JSON format.<ref>{{Citation \|title=JSON \|date=2022-08-25 \|url=https://en.wikipedia.org/w/index.php?title=JSON&oldid=1106610160 \|work=Wikipedia \|language=en \|access-date=2022-08-29}}</ref> WebSocket is supported by [[Google Chrome]], [[Firefox]], [[Safari (web browser)\|Safari]], [[Microsoft Edge]], [[Internet Explorer]], and [[Opera (web browser)\|Opera]]. This server can be utilized with a variable. Declare a variable and set the value to "new WebSocket()". Inside of the parentheses put the [[URL\|URL (Uniform Resource Locator)]] of your WebSocket connection. Create custom functions for this to create a [[Instant messaging\|chat application]] or another idea.

	=== Recap ===		=== Recap ===

WikiMasterBot2: Moved page from wikipedia:en:Draft:JavaScript Basics (history)

2022-09-02T00:26:29Z

Moved page from wikipedia:en:Draft:JavaScript Basics ([[Edithistory:|history]])

New page

{{AFC submission|d|e|u=PantherPedia|ns=118|decliner=Mcmatter|declinets=20220829021031|reject=yes|ts=20220829012447}} 

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----

{{Short description|JavaScript Basics Tutorial}}
{{Draft topics|media|stem}}
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= JavaScript Basics =

=== Variables ===
Variables.<ref>{{Citation |title=Variable (computer science) |date=2022-08-19 |url=https://en.wikipedia.org/w/index.php?title=Variable_(computer_science)&oldid=1105315140 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref> are data stored as a value in a named space. Variables can be used as a mathematical constant<ref>{{Citation |title=Constant (mathematics) |date=2022-06-02 |url=https://en.wikipedia.org/w/index.php?title=Constant_(mathematics)&oldid=1091159181 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>, to use in math commands to generate a user output<ref name=":0">{{Citation |title=Input/output |date=2022-08-28 |url=https://en.wikipedia.org/w/index.php?title=Input/output&oldid=1107158004 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>, such as e<ref>{{Citation |title=e (mathematical constant) |date=2022-08-26 |url=https://en.wikipedia.org/w/index.php?title=E_(mathematical_constant)&oldid=1106854025 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>, which has a value of 2.718281828459045. To declare a new constant, type the keyword "const"<ref>{{Citation |title=const (computer programming) |date=2022-08-20 |url=https://en.wikipedia.org/w/index.php?title=Const_(computer_programming)&oldid=1105407141 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>, and add the [[JavaScript syntax#Declaration and assignment|assignment declaration]]. Add the value to declare the constant. Note that constants cannot be changed afterward, which should be self-explanatory. Normal variables work the same way, and can be changed accordingly depending on user input. Variables can also hold strings<ref>{{Citation |title=String (computer science) |date=2022-08-01 |url=https://en.wikipedia.org/w/index.php?title=String_(computer_science)&oldid=1101756832 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>, which is useful for input such as authorization<ref>{{Citation |title=Authorization |date=2022-08-18 |url=https://en.wikipedia.org/w/index.php?title=Authorization&oldid=1105166484 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref> or for a search engine<ref>{{Citation |title=Search engine |date=2022-08-28 |url=https://en.wikipedia.org/w/index.php?title=Search_engine&oldid=1107150189 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>. Variables can also identify as undefined<ref>{{Citation |title=Undefined value |date=2021-12-09 |url=https://en.wikipedia.org/w/index.php?title=Undefined_value&oldid=1059485044 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref> or null<ref>{{Citation |title=Null character |date=2022-08-10 |url=https://en.wikipedia.org/w/index.php?title=Null_character&oldid=1103680343 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>

=== Functions ===
Functions<ref>{{Citation |title=Function object |date=2022-04-22 |url=https://en.wikipedia.org/w/index.php?title=Function_object&oldid=1084126278 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref> are a keyword used in [[object-oriented programming]]. These are used to run code multiple times, for example, a login button. They can setup the procedure and insert it inside of a function named ''loginProcedure''. Using the [[Document Object Model]], they can have the function execute when an [[HTML element]] is clicked.

=== Event Keywords ===
[[Event (computing)|Events]] is a trigger usually initiated by user input<ref name=":0" />, which allows certain blocks of code to execute. Here's a [[HTML attribute#Event attributes|complete list]].

=== WebSockets and User Connections ===
User connections include social networking<ref>{{Citation |title=Social networking service |date=2022-08-22 |url=https://en.wikipedia.org/w/index.php?title=Social_networking_service&oldid=1105837230 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>, messaging between users<ref>{{Citation |title=Message |date=2022-07-26 |url=https://en.wikipedia.org/w/index.php?title=Message&oldid=1100585875 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>, or playing an online game<ref>{{Citation |title=Multiplayer video game |date=2022-08-12 |url=https://en.wikipedia.org/w/index.php?title=Multiplayer_video_game&oldid=1104068378 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>. WebSocket<ref>{{Citation |title=WebSocket |date=2022-08-06 |url=https://en.wikipedia.org/w/index.php?title=WebSocket&oldid=1102718692 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref> is a protocol used for seamless and fast communication listening on a port<ref>{{Citation |title=Port (computer networking) |date=2022-08-04 |url=https://en.wikipedia.org/w/index.php?title=Port_(computer_networking)&oldid=1102379124 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>. Encoded messages are sent over this line, usually in a JSON format<ref>{{Citation |title=JSON |date=2022-08-25 |url=https://en.wikipedia.org/w/index.php?title=JSON&oldid=1106610160 |work=Wikipedia |language=en |access-date=2022-08-29}}</ref>. WebSocket is supported by [[Google Chrome]], [[Firefox]], [[Safari (web browser)|Safari]], [[Microsoft Edge]], [[Internet Explorer]], and [[Opera (web browser)|Opera]]. This server can be utilized with a variable. Declare a variable and set the value to "new WebSocket()". Inside of the parentheses put the [[URL|URL (Uniform Resource Locator)]] of your WebSocket connection. Create custom functions for this to create a [[Instant messaging|chat application]] or another idea.

=== Recap ===
View the references for more info on this topic. Event keywords, WebSockets, Functions, and Variables were all listed in this page.<syntaxhighlight lang="javascript" line="1">
// Variables
var variable = 1;
const constant = 2;
// Better to use let keyword
let username = user;

// Functions
function myFunction() {
console.log("Hello World!")
}
// Execute this function
myFunction()

// WebSockets
let socket = new WebSocket("server-url")
/* Add your custom WebSocket
functionality here! */

</syntaxhighlight>
View the references for more info. 

== References ==

{{reflist}}
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