Each nav-link should have an href attribute that links to its corresponding .main-section

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**
/* file: index.html */
<nav id="navbar">
<ul class="nav-list">
<li class="nav-list-items"><a class="nav-link" href="#Introduction">Introduction</a></li>
<li class="nav-list-items"><a class="nav-link" href="#What_you should_already_know">What you should already know</a></li>
<li class="nav-list-items"><a class="nav-link" href="#JavaScript_and_Java">Javascript and Java</a></li>
<li class="nav-list-items"><a class="nav-link" href="#Hello_World">Hello World</a></li>
<li class="nav-list-items"><a class="nav-link" href="#Variables">Variables</a></li>
<main id="main-doc">
<section class="main-section" id="Introduction">
<header class="main-header">Introduction</header>
<p>JavaScript (/ˈdʒɑːvəskrɪpt/),[10] often abbreviated JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS.[11]</p>
<code>var a = {}; // create a new object 
a.b = 'hello';</code>
<p>As of 2022, 98% of websites use JavaScript on the client side for webpage behavior,[12]often incorporating third-party libraries.[13] All major web browsers have a dedicated JavaScript engine to execute the code on users' devices.</p>
<li> You can add properties to almost everything</li>
<section class="main-section" id="what_you should_already_know"><header class="main-header"> What you should already know</header>
<p>JavaScript is a high-level, often just-in-time compiled language that conforms to the ECMAScript standard.[14]</p>
<code>var a = []; // create an array 
a.b = 'hello';</code>
<p> It has dynamic typing, prototype-based object-orientation, and first-class functions. It is multi-paradigm, supporting event-driven, functional, and imperative programming styles. It has application programming interfaces (APIs) for working with text, dates, regular expressions, standard data structures, and the Document Object Model (DOM).</p>
<li>Functions are objects
<section class="main-section" id="JavaScript_and_Java_"><header class="main-header"> JavaScript and Java</header><p>The ECMAScript standard does not include any input/output (I/O), such as networking, storage, or graphics facilities.</p>
<code>var a = function() {}; 
a.b = 'hello';</code>
<p> In practice, the web browser or other runtime system provides JavaScript APIs for I/O.</p>
<li>Variable scoping</li>
<section class="main-section" id="Hello_world" ><header class="main-header"> Hello World</header><p>JavaScript engines were originally used only in web browsers,</p>
<code>function doIfTrue(isTrue, whatToDo)
doIfTrue(true, function() {alert('hello');}); //  alerts "world"
doIfTrue(false, function() {alert('world');}); // does nothing</code>
<p>but are now core components of some servers and a variety of applications. The most popular runtime system for this usage is Node.js.</p>
<li>Variables that aren’t explicitly declared can be global</li>
<section class="main-section" id="Variables"><header class="main-header"> Variables</header><p>Although Java and JavaScript are similar in name, syntax, and respective standard libraries,</p>
<code>var arr = ['a', 'b', 'c']; 
for(var i in arr) { 
alert(i); // 0, 1, 2 
alert(arr[i]); // 'a', 'b', 'c' 
<p> the two languages are distinct and differ greatly in design.</p>
<li> Understand how .prototype works</li>
<link rel="stylesheet" href="styles.css">
/* file: styles.css */
@media max-width(720px){
  p {
    display: none;
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36

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