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JavaScript

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HTML

              
                <nav id="navbar">
        <header id="menu-heading">JS Documentation</header>
        <div id="menu">
            <a href="#Introduction" class="nav-link">Introduction</a>
            <a href="#What_you_should_already_know" class="nav-link">What you should already know</a>
            <a href="#JavaScript_and_Java" class="nav-link">JavaScript and Java</a>
            <a href="#Hello_world" class="nav-link">Hello world</a>
            <a href="#Variables" class="nav-link">Variables</a>
            <a href="#Declaring_variables" class="nav-link">Declaring variables</a>
            <a href="#Variable_scope" class="nav-link">Variable scope</a>
            <a href="#Global_variables" class="nav-link">Global variables</a>
            <a href="#Constants" class="nav-link">Constants</a>
            <a href="#Data_types" class="nav-link">Data types</a>
            <a href="#if...else_statement" class="nav-link">if...else statement</a>
            <a href="#Reference" class="nav-link">Reference</a>
        </div>
    </nav>
    <main id="main-doc">
        <section class="main-section" id="Introduction">
            <header>Introduction</header>
            <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>
        </section>
        <section class="main-section" id="What_you_should_already_know">
            <header>What you should already know</header>
            <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>
        </section>
        <section class="main-section" id="JavaScript_and_Java">
            <header>JavaScript and Java</header>
            <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>

        </section>
        <section class="main-section" id="Hello_world">
            <header>Hello world</header>
            <p>To get started with writing JavaScript, open the Scratchpad and write your first "Hello world"
                JavaScript
                code:</p>
            <code>function greetMe(yourName) { alert("Hello " + yourName); } greetMe("World");</code>
            <p>Select the code in the pad and hit Ctrl+R to watch it unfold in your browser!</p>
        </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>
            <p>You can declare a variable in three ways:</p>
            <p>With the keyword var. For example,</p>
            <code>var x = 42.</code>
            <p>This syntax can be used to declare both local and global variables.</p>
            <p>By simply assigning it a value. For example,</p>
            <code>x = 42.</code>
            <p>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,</p>
            <code>let y = 13.</code>
            <p>This syntax can be used to declare a block scope local variable. See Variable scope below.</p>
        </section>

        <section class="main-section" id="Variable_scope">
            <header>Variable scope</header>
            <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>
        </section>

        <section class="main-section" id="Global_variables">
            <header>Global variables</header>
            <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>
        </section>
        <section class="main-section" id="Constants">
            <header>Constants</header>
            <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.</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>
            <p>However, object attributes are not protected, so the following statement is executed without
                problems.
            </p>
            <code>const MY_OBJECT = {"key": "value"}; MY_OBJECT.key = "otherValue";</code>
        </section>
        <section class="main-section" id="Data_types">
            <header>Data types</header>
            <p>The latest ECMAScript standard defines seven data types:</p>
            <ul>
                <li>The latest ECMAScript standard defines seven data types:
                    <ul>
                        <li>The latest ECMAScript standard defines seven data types:</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>String. "Howdy"</li>
                    </ul>
                </li>
                <li>and Object</li>
            </ul>
            <p>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.</p>
        </section>
        <section class="main-section" id="if...else_statement">
            <header>if...else statement</header>
            <p>if...else statement</p>
            <code>if (condition) { statement_1; } else { statement_2; }</code>
            <p>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>
            <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>
            <p>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:</p>
            <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>
            <p>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:</p>
            <code>if (x = y) { /* statements here */ }</code>
            <p>If you need to use an assignment in a conditional expression, a common practice is to put additional
                parentheses around the assignment. For example:</p>
            <code>if ((x = y)) { /* statements here */ }</code>
</section>
        <section class="main-section" id="Reference">
            <header>Reference</header>
            <p>All the documentation in this page is taken from <a
                    href="All the documentation in this page is taken from MDN" target="_blank" id="mdn-link">MDN</a>
            </p>
        </section>
    </main>
              
            
!

CSS

              
                body{
    display: grid;
    grid-template-columns: 1fr 4fr;
    /* grid-template-rows: auto; */
}
#navbar{
    display: flex;
    flex-direction: column;
align-items: center;
height: 100vh;
width: 16vw;
}
#menu-heading{
    display: flex;
    align-items: center;
    height: 7vh;
    position: fixed;
    top: 0;
color: black;
font-size: 1.7rem;
}
#menu{
    display: flex;
    flex-direction: column;
    position: fixed;
top: 3rem;
}

a{
    text-decoration: none;
    color: hsl(0, 0%, 30%);
    height: 7vh;
    width: 100%;
    display: flex;
    align-items: center;
    font-size: 1.2rem;
    border-bottom: 1px solid hsl(0, 0%, 30%);
}
#main-doc{
    line-height: 1.5rem;
    font-size: 1.3rem;   
    color: hsl(0, 0%, 30%);
    width: 75vw;
}
.main-section{
    margin-top: 1.5rem;
}
.main-section header{
    font-size: 1.5rem;
    color: black;
font-weight: 600;
}
p{
    margin-left: 1.2rem;
}
code{
    display: block;
    background: hsl(0, 0%, 86%)	;
    margin-left: 1.2rem;
}
@media (max-width: 820px)
{
    #navbar{
        position: relative;
        /* left: 0.8rem; */
    width: 17vw;
    }
    #menu-heading{
        font-size: 0.9rem;
        height: 4vh;
    }
    a{
        font-size: 0.7rem;
        height: 4vh;
    }
    .main-section{
        font-size: 0.8rem ;
    }
    .main-section header{
        font-size: 0.9rem;
    }
#menu{
    top: 2rem;
}
}
@media(max-width: 430px)
{
#navbar{
flex-direction: row;
    z-index: 2;
}
#menu-heading{
    background: white;
    width: 100%;
    justify-content: center;
}
#menu{
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    background: hsl(0, 0%, 91%);
    margin-right:8px;

}
a{
    margin: auto 6px 0;
}
#main-doc{
    position: relative;
    top: 14vh;
    right: 11vw;
    align-items: center;
    text-align: justify;
    margin: 0;
    z-index: 1;
}
}
              
            
!

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