Technical Documentation Page - Build a Technical Documentation Page

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<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="styles.css">
  <nav id="navbar">
  <header>JS Documentation</header>
  <li><a class="nav-link"href="#introduction"rel="internal">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="#Topic_1">Topic 1</a></li>
  <li><a class="nav-link"href="#Topic_2">Topic 2</a></li>
 <main id="main-doc">
   <section class="main-section" id="Introduction">
     <header id="Introduction"><h1>Introduction<h1></header>
     <code>Declaring variables</code>
     <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>
       <code>Declaring variables</code>/code>
   <section class="main-section" id="What_you_should_already_know">
     <header id="What you should already know"><h3>What you should already know</h3></header>
     <p>This guide assumes you have the following basic background:</p>
     <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>
     <p>Any other content to be covered before learning this topic</p>
   <section class="main-section" id="JavaScript_and_Java">
     <header id="JavaScript_and_Java"><h3>Javascript and Java</h3></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.</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.</p>
     <code>Hello world</code>
   <section class="main-section" id="Topic_1">
     <header><h3>Topic 1</h3></header>
     <p>Technical documentation should thorough and to the point</p>
     <p>Write about features, comparisons with other languages</p>
   <section class="main-section" id="Topic_2">
     <header><h3>Topic 2</h3></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>When you declare a variable within a function, it is called a local variable, because it is available only within that function.</p>
     <code>This would come in a different color and font indicating lines of code</code>
/* file: styles.css */

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Challenge: Technical Documentation Page - Build a Technical Documentation Page

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Hello and welcome to the forum. Please describe your issue.


you have to match the names and ids exactly
for example, in your navbar you are trying to write
href="#introduction" but that should be #Introduction

Check all your links and make sure they use the exact ids with the capital letters intact.

please check more carefully.

for eg. #Javascript_and_Java should be #JavaScript_and_Java

make sure each id matches the header and each href matches the id

Take a look at your code here:
If you have corrected this, it is ok. I have seen this in your previously posted code.

Please post actual code and communicate with us in actual words. Thank you