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HTML

              
                <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript || Documentation</title>
    <link rel="stylesheet" href="index.css">
</head>
<body>
    <nav id="navbar">
        <header>JS Documentation</header>
        <ul>
          <li><a class="nav-link" href="#Introduction">Introduction</a></li>
          <li>
            <a class="nav-link" href="#What_you_should_already_know"
              >What you should already know</a
            >
          </li>
          <li>
            <a class="nav-link" href="#JavaScript_and_Java">JavaScript and Java</a>
          </li>
          <li><a class="nav-link" href="#Hello_world">Hello world</a></li>
          <li><a class="nav-link" href="#Variables">Variables</a></li>
          <li>
            <a class="nav-link" href="#Declaring_variables">Declaring variables</a>
          </li>
          <li><a class="nav-link" href="#Variable_scope">Variable scope</a></li>
          <li><a class="nav-link" href="#Global_variables">Global variables</a></li>
          <li><a class="nav-link" href="#Constants">Constants</a></li>
          <li><a class="nav-link" href="#Data_types">Data types</a></li>
          <li>
            <a class="nav-link" href="#if...else_statement">if...else statement</a>
          </li>
          <li><a class="nav-link" href="#while_statement">while statement</a></li>
          <li>
            <a class="nav-link" href="#Function_declarations"
              >Function declarations</a
            >
          </li>
          <li><a class="nav-link" href="#Reference">Reference</a></li>
        </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>
                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>
                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_already_know">
          <header>What you should already 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.
          </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 &lt; 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 &lt; 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>
        <hr>
        <footer>copyright : @whoisabi_2021 </footer>
      </main>
    
    
</body>
</html>
              
            
!

CSS

              
                html,
body {
  min-width: 290px;
  color: #4d4e53;
  background-color: #ffffff;
  font-family: 'Open Sans', Arial, sans-serif;
  line-height: 1.5;
}

#navbar {
  position: fixed;
  min-width: 290px;
  top: 0px;
  left: 0px;
  width: 300px;
  height: 100%;
  border-right: solid;
  background-color: rgb(230, 140, 23);
  border-color: rgba(0, 22, 22, 0.4);
}

header {
  color: black;
  margin: 10px;
  text-align: center;
  font-size: 1.8em;
  font-weight: thin;
}

#main-doc header {
  text-align: left;
  margin: 0px;
}

#navbar ul {
  height: 88%;
  padding: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

#navbar li {
  border-top: 1px solid;
  list-style: none;
  position: relative;
  width: 100%;
}

#navbar a {
  display: block;
  padding: 10px 30px;
  color: #ffffff;
  text-decoration: none;
  cursor: pointer;
}

#main-doc {
  position: absolute;
  margin-left: 310px;
  padding: 20px;
  margin-bottom: 110px;
}

section article {
  color: #4d4e53;
  margin: 15px;
  font-size: 0.96em;
}

section li {
  margin: 15px 0px 0px 20px;
}

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;
}

@media only screen and (max-width: 815px) {
  /* For mobile phones: */
  #navbar ul {
    border: 1px solid;
    height: 207px;
  }

  #navbar {
    background-color: white;
    position: absolute;
    top: 0;
    padding: 0;
    margin: 0;
    width: 100%;
    max-height: 275px;
    border: none;
    z-index: 1;
    border-bottom: 2px solid;
  }

  #main-doc {
    position: relative;
    margin-left: 0px;
    margin-top: 270px;
  }
}

@media only screen and (max-width: 400px) {
  #main-doc {
    margin-left: -10px;
  }

  code {
    margin-left: -20px;
    width: 100%;
    padding: 15px;
    padding-left: 10px;
    padding-right: 45px;
    min-width: 233px;
  }
}
footer{
    text-align: center;
    font-size: small;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

              
            
!

JS

              
                // !! IMPORTANT README:

// You may add additional external JS and CSS as needed to complete the project, however the current external resource MUST remain in place for the tests to work. BABEL must also be left in place. 

/***********
INSTRUCTIONS:
  - Select the project you would 
    like to complete from the dropdown 
    menu.
  - Click the "RUN TESTS" button to
    run the tests against the blank 
    pen.
  - Click the "TESTS" button to see 
    the individual test cases. 
    (should all be failing at first)
  - Start coding! As you fulfill each
    test case, you will see them go   
    from red to green.
  - As you start to build out your 
    project, when tests are failing, 
    you should get helpful errors 
    along the way!
    ************/

// PLEASE NOTE: Adding global style rules using the * selector, or by adding rules to body {..} or html {..}, or to all elements within body or html, i.e. h1 {..}, has the potential to pollute the test suite's CSS. Try adding: * { color: red }, for a quick example!

// Once you have read the above messages, you can delete all comments. 

              
            
!
999px

Console