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The nav links are not taking me to their respective sections. I gave the nav link href and the section id the same value i don’t know why the link is not working only that of the introduction seems to be working. Each time i run the test it says it is wrong.
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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8"></meta>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Tecnical Documentation</title>
    <link href="styles.css" rel="stylesheet" />
  </head>
  <body>
    <div class="content-wrapper">
      <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"></a>What you should already know</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"></a>if...else statement</li>
        <li><a class="nav-link" href="While_statement">While statement</a></li>
        <li><a class="nav-link" href="Function_declarations"></a>Function declarations</li>
        <li><a class="nav-link" href="Reference">Reference</a></li>
      </ul>
    </nav>  
    <main id="main-doc">
      <section role="region" aria-labelledby="Introduction" id="Introduction" class="main-section">
        <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 role="region" aria-labelledby="What_you_should_already_know" 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 basicbackground:</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 role="region" aria-labelledby="JavaScript_and_Java" 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 role="region" aria-labelledby="Hello_world" id="Hello_world" class="main-section">
        <header>Hello world</header>
        <article>
          <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>
        </article>
      </section>
      <section role="region" aria-labelledby="Variables" class="main-section" id="Variables">
        <header>Variables</header>
        <article>
          <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>
        </article>
      </section>
      <section role="region" aria-labelledby="Declaring_variables" class="main-section" id="Declaring_variables">
        <header id="Declaring_variables">Declaring variables</header>
        <article>
          <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>his syntax
        can be used to declare a block scope local variable. See Variable scope
        below.</p>
        </article>
      </section>
      <section role="region" aria-labelledby="Variable_scope" 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 role="region" aria-labelledby="Global_variables" 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 role="region" aria-labelledby="Constants" 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>
        <p>wever, 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>
        </article>
      </section>
      <section role="region" aria-labelledby="Data_types" class="main-section" id="Data_types">
        <header>Data types</header>
        <article>
          <p>The latest ECMAScript standard defines seven data types:</p>
          <ul>
            <li>Six data types that are primitives:
            <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>ring. "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>
        <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>
        </article>
      </section>
      <section role="region" aria-labelledby="if...else_statement" class="main-section" id="if...else_statement">
        <header>if...else statement</header>
        <article>
          <p>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:</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>
        </article>
      </section>
      <section role="region" aria-labelledby="While_statement" class="main-section" id="While_statement">
        <header>While statement</header>
        <article>
          <p>A while statement executes its statements as long as a specified condition
      evaluates to true. A while statement looks as follows:</p>
          <code> while (condition) statement</code>
          <p>If the condition becomes false,
      statement within the loop stops executing and control passes to the
      statement following the loop.</p>
          <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>
          <p>Example:</p>
          <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 < 3 is no longer true, so the loop terminates.

</p>
        </article>
      </section>
      <section role="region" aria-labelledby="Function_declarations" class="main-section" id="Function_declarations">
        <header>Function declarations</header>
        <article>
          <p>A function definition (also called a function declaration, or function
      statement) consists of the function keyword, followed by:</p>
          <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 role="region" aria-labelledby="Reference" class="main-section" id="Reference">
        <header>Reference</header>
          <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>
      </section>
    </main>  
    </div>
  </body>
</html>
because they allow your code to properly format in the post.

Your browser information:

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Challenge: Technical Documentation Page - Build a Technical Documentation Page

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The “What you should already know”, “if…else statement”, and “Function declarations” texts that are in the ul element are not inside of their anchor (a) elements. This could be a reason for your problem.

Thanks just noticed that, solved one of thee problems what’s left is for the navigation link to take me to the respective sections like i said earlier with the exception of the ‘introduction’ and the ‘what you should already know’ the rest are not working.

Hola

@ abdulmajeedyusuf075

En la mayoria de enlaces te falta el caracter "#" al inicio del atributo href, por esa razon no funcionan.

<li><a class="nav-link" href="JavaScript_and_Java">JavaScript and Java</a></li>

Y tienes tres casos en los que cierras la etiqueta </a> antes del contenido del enlace

<li><a class="nav-link" href="if...else_statement"></a>if...else statement</li>

saludos

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