Technical Documentation Page - Build a Technical Documentation Page

Hello All! I am currently doing the Technical Documentation project and i can’t seem to meet the following requirement:

“Each .nav-link should have an href attribute that links to its corresponding .main-section (e.g. If you click on a .nav-link element that contains the text “Hello world”, the page navigates to a section element with that id).”

Here the link to my code: https://www.freecodecamp.org/learn/2022/responsive-web-design/build-a-technical-documentation-page-project/build-a-technical-documentation-page

When I’m on the actual exercise page, the href element links are navigating to the corresponding section. Can anyone please guide me on what I’m doing wrong?

Welcome to our community!

Post the entire html and css code here.

HTML Code

type or <!DOCTYPE html>
<html  lang="en">
<head>
<meta charset="utf-8">
  	<meta name="description" content="Your description goes here">
  	<meta name="keywords" content="one, two, three">
		<meta name="viewport" content="width=device-width, initial-scale=1">
  	<!-- external CSS link -->
		<link rel="stylesheet" href="css/normalize.css">
		<link rel="stylesheet" href="styles.css">
		<title>JS Documentation</title>

</head>
<body>

 <nav id="navbar" class="js-nav">
    
  <header id="JS-Documentation">
      <h1>JS Documentation</h1>
  </header>
  
   <ul>
   <li><a href="#introduction" class="nav-link">Introduction</a><br /></li>
<li><a href="#what_you_should_already_know" class="nav-link">What you should already know</a><br /></li>
   <li><a href="#javascript_and_java" class="nav-link">JavaScript and Java</a><br /></li>
    <li><a href="#hello_world" class="nav-link">Hello world</a><br /></li>
    <li><a href="#variables" class="nav-link">Variables</a><br /></li>
   <li><a href="#declaring_variables" class="nav-link">Declaring variables</a><br /></li>
   <li><a href="#variable_scope" class="nav-link">Variable scope</a><br /></li>
    <li><a href="#global_variables" class="nav-link">Global variables</a><br /></li>
    <li><a href="#constants" class="nav-link">Constants</a><br /></li>
    <li><a href="#data_types" class="nav-link">Data types</a><br /></li>
    <li><a href="#if...else_statements" class="nav-link">if...else statement</a><br /></li>
    <li><a href="#while_statement" class="nav-link">while statement</a><br /></li>
    <li><a href="#function_declarations"  class="nav-link">Function declarations</a><br /></li>
    <li><a href="#reference" class="nav-link">Reference</a><br /></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><br>
  
     <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><br>
        
      <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>
    <span>This guide assumes you have the following basic background:</span>
      <ul>
        <li>A general understanding of the Internet and the World WIde Web (WWW).</li><br>
        <li>Good working knowledge of HyperText Markup Language (HTML).</li><br>
        <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><!--

JavaScript and Java

--><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 expressions 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 explicit 
      typed. 
    </p>
  </article>
 </section> 
    
<section class="main-section" id="hello_world"> 
  <header>Hello world</header>

<article>
    <p>To get started with writing Javascript, open the Scratchpad and write your first "Hello world" JavaScript code:</p>
      <pre>
        <code>function greetMe(your name) { alert("Hello " + yourName); }</code>
        <code>greetMe("World");</code>
      </pre>
  
    <p>Select the code in the pad and hit Ctrl+R to watch it unfold in your browser!</p>
  </article>
      
</section><!--   
  
Variables
  
--><section 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 á and ű 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 class="main-section" id="declaring_variables">
  <header>Declaring variables</header>

  <article>
    
      <p>
       <span>You can declare a variable in three ways:</span><br>
       <span>With the keyword var. For example, </span>
      </p>
      
      <pre>
        <code>var x = 42.</code>
      </pre>
  
      <p>
        <span>This syntax can be used to declare both local and global variables.</span><br>
        <span>By simply assigning it a value. For example,</span>
      </p>  
       
      <pre>
        <code>x = 42.</code>
      </pre>
  
      <p>
        <span>This always declares a global variable. It generates a strict JavaScript warning. 
        You shouldn't use this variant.</span><br>
        <span>With the keyword let. For example,</span>
      </p>
  
        <pre>
          <code>let y = 13.</code>
        </pre>
  
      <span>This syntax can be used to declare a block scope local variable. See Variable below.</span>
    </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 ny codre in the current document.
          When you declare a vatiabler 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>
        
        <pre>
          <code>if (true) { xar x = 5} console.log(x); // 5</code>
        </pre>
        
        <span>This behavior changes when the let declaration introduced in ECMAScript 2015.
        </span>
        
        <pre>
          <code>if (true) { let y = 5} console.log(y); // 5 ReferenceError: y is 
          not defined</code>
        </pre>
        
      </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, is a variable called phoneNumber is declared in a document, 
          you can refer to this variable from an inframe as parent phoneNumber.
        </p>
    </article>
</section><!-- 
  
Constants  
  
--><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>
        <pre>
          <code>const PI = 3.14;</code>
        </pre>
  
     <p>A constant cannot change value through assignment or be redeclared 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 as a function or variable in the same scope. For example:</p>
  
      <pre>
        <code>//THIS WILL CAUSE AN ERROR function f() {}; const f=5; // THIS WILL </code><br>
        <code>CAUSE AN ERROR ALSO function () { const g = 5; var g; // statements}</code>
      </pre>
  
    <p>However, object attributes are not protected, so the following is executed without problems.</p>
  
      <pre>
        <code>constant MY_OBJECT = ("key": "value"); MY_OBJECT.key = "otherValue";</code><br>
      </pre>
  </article>
</section><!--

Data Types

--><section 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><br>
                <li>null. A special keyword denoting a null value. Because JavaScript is case-sensitive, null is not 
                  same as Null, NULL, or any other variant.</li><br>
                <li>undefined. A top-level property whose value is undefined.</li><br>
                <li>Number. 42 or 3.14159</li><br>
                <li>String. "Howdy"</li><br>
                <li>Symbol (new in ECMAScript 2015). A data type whose instances are unique and immutable.</li><br>
              </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 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 to 
        execute a statement if the condition is false. An if statement looks as follows:
      </p>
         <pre>
        <code>if (condition) { statement_1; } else { statement_2; }</code><br>
      </pre>
  
    <p>condition can be any expression that evaluates to true or false. See Boolean for an explanation of what 
      evaluates to true anad 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>
       <pre>
        <code>if (condition_1) { statement_1; } else if (condition_2) {statement_2;}</code><br>
        <code>else if (condition_n) { statement_n; } else { statement_last; }</code>  
      </pre>
  
    <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, its good practice to 
      always use block statements, especially when nesting if statements:
    </p>  
       <pre>
        <code>if (condition) { statement_1_runs_if_condition_is_true;</code><br>
        <code>statement_2_runs_if_condition_is_true; } else {</code><br>
        <code>statement_3_runs_if_condition_is_false;</code>
        <code>statement_4_runs_if_condition_is_false; }</code>
      </pre>
  
    <p>Is it 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>
        <pre>
          <code>if (x = y) { /* statements here */ }</code><br>
        </pre>
  
    <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>  
        <pre>
          <code>if ((x = y)) { /* statements here */ }</code><br>
        </pre>
  </article>
  </section>
  
<section class="main-section" id="while_statement">  
 <header>while statement</header>

  <article>
    
      <p>A while executed its statements as long as a specified condition evaluates to true. A while statement 
        looks as follows:</p>
         <pre>
          <code>while (condition) statement</code><br>
        </pre>
  
    <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>
  
    <span>Example:</span>
  
    <p>The following while loop iterates as long as n is less than three:</p>
        <pre>
          <code>var n = 0; var x = 0; while n &lt; 3   {  n++; x += n; }</code>
        </pre>
    
    <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><br>
        <li>After the second pass: n = 2 and x = 3</li><br>
        <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><!--

Function Declarations

--><section 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><br>
        <li>A list arguments to the function, enclosed in parentheses and separated by commas.</li><br>
        <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>
        <pre>
          <code>function square(number) { return number * number; }</code>
        </pre>
  
    <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 by 
      the function. 
    </p>
        <pre>
          <code>return number * number;</code>
        </pre>
  
     <p>Primitive parameter (such as a number) are passed to 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>

    <ul><li>All the documentation in this page is taken from <a class="reference-mdn">MDN</a></li><br></ul>
 </section>   
 
  
</main>   
  
</body>
  
</html>
paste code here

CSS Code

/* Box Model Hack */
 * {
    box-sizing: border-box;
  }
  
  /* Clear fix hack */
  .clearfix:after {
       content: ".";
       display: block;
       clear: both;
       visibility: hidden;
       line-height: 0;
       height: 0;
  }
  
  .clear {
      clear: both;
  }
  
/******************************************
/* BASE STYLES
/*******************************************/

html,body {
 
 font-family: Arial , sans-serif;
 width: 100%;
 color: black;
 color: #3B2408; 
 line-height: 1.5;   
  
  
}

/******************************************
/* LAYOUT
/*******************************************/


#navbar {
  position: fixed;
  min-width: 290px;
  top: 0px;
  left: 0px;
  width: 300px;
  height: 100%;
  border-right: solid;
}



#js-documentation {
  text-align: center;
  margin: 10px;
  font-weight: thin;
}

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

#navbar li {
  list-style: none;
  border-bottom: 1px solid grey;
  padding:  10px;
  overflow-y: auto;
  overflow-x: hidden;
}

#navbar a {
  
  padding: 10px 20px;
  text-decoration: none;
  color: black;
  cursor: pointer;
}

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

header {
  font-size: 24px;
  font-weight: bold;
}

section {
  margin: 15px;
  font-size: 0.96em
}

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


pre {
  background-color: #FAFAFA;
  padding-top: 10px;
}

a.reference-mdn {
  text-decoration: underline; 
  color: blue;
}

#function-reference {
  height: 620px;
}

/******************************************
/* Media Queries
/*******************************************/

@media only screen and (max-width: 815px) {
  /*For mobile phones: */
  
  nav li {
    border: 1px solid;
    height: 50px; 
  }
  
  #navbar {
    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; 
    padding-top: 50px;
  }
  
@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;
  }
    
  
}

}

You cannot use dots between words in href attribute’s value:
<li><a href="#if...else_statements" class="nav-link">if...else statement</a><br /></li>

Use underscores.

i use underscores before and my code didn’t meet the following requirement: Each .main-section should have an id that matches the text of its first child, having any spaces in the child’s text replaced with underscores (_ ) for the id’s.

when i include the dots in the href attribute value for that particular line, the requirement is met.


You can see what is the error:

<li><a href="#if...else_statements" ....here you have an "s" letter

<section class="main-section" id="if...else_statement">  ...here you don't have the "s" letter

i feel like a dodo bird lol, thank you so much!!

1 Like

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