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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

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About the <head>

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Insecure Resource

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CSS

About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML 

              
                
    <nav>
        
        <div class="hamburger">
            <div class="line1"></div>
            <div class="line2"></div>
            <div class="line3"></div>
        </div>
        <ul class="nav-links">
            <li><a href="#">Home</a></li>
            <li><a href="#">About Us</a></li>
            <li><a href="#">Our team</a></li>
            <li><a href="#">Careers</a></li>
            <li><a href="#">Contact Us</a></li>
            <li><button class="login-button" href="#">Login</button></li>
            <li><button class="join-button" href="#">Sign Up</button></li>
        </ul>
    </nav>
!

CSS 

              
                *{
    margin: 0;
    padding: 0;
  color: black;
  font-weight:bold;
    font-family: sans-serif;
}
body{
    overflow-x: hidden;
}
nav{
    height: 6rem;
    width: 100vw;
    background-color: #0EBAC5;
    box-shadow: 0 3px 20px rgba(0, 0, 0, 0.2);
    display: flex;
    position: fixed;
    z-index: 10;
}

.logo{
    padding:1vh 1vw;
    text-align: center;
}
.logo img {
    height: 5rem;
    width: 5rem;
}

.nav-links{
    display: flex;
    list-style: none; 
    width: 88vw;
    padding: 0 0.7vw;
    justify-content: space-evenly;
    align-items: center;
    text-transform: uppercase;
}
.nav-links li a{
    text-decoration: none;
    margin: 0 0.7vw;
}
.nav-links li a:hover {
    color: #61DAFB;
}
.nav-links li {
    position: relative;
}
.nav-links li a::before {
    content: "";
    display: block;
    height: 3px;
    width: 0%;
    background-color: #61DAFB;
    position: absolute;
    transition: all ease-in-out 250ms;
    margin: 0 0 0 10%;
}
.nav-links li a:hover::before{
    width: 80%;
}

.login-button{
    background-color: white;
    border: 1.5px solid white;
    border-radius: 15px;
    padding: 0.6rem 0.8rem;
    margin-left: 2vw;
    font-size: 1rem;
    cursor: pointer;

}
.login-button:hover {
   background-color: transparent;
   border: 2px solid white;
    color: #131418;
    transition: all ease-in-out 350ms;
}
.join-button{
    color: #131418;
    background-color: transparent;
    border: 1.5px solid #61DAFB;
    border-radius: 15px;
    padding: 0.6rem 0.8rem;
    font-size: 1rem;
    cursor: pointer;
}
.join-button:hover {
    color: #f2f5f7;
    background-color: transparent;
    border:1.5px solid #f2f5f7;
    transition: all ease-in-out 350ms;
}

.hamburger div{
    width: 30px;
    height:3px;
    background: #f2f5f7;
    margin: 5px;
    transition: all 0.3s ease;
}
.hamburger{
    display: none;
}

@media screen and (max-width: 800px){
    nav{
        position: fixed;
        z-index: 3;
    }
    .hamburger{
        display:block;
        position: absolute;
        cursor: pointer;
        right: 5%;
        top: 50%;
        transform: translate(-5%, -50%);
        z-index: 2;
        transition: all 0.7s ease;
    }
    .nav-links{
        position: fixed;
        background: #0EBAC5;
        height: 100vh;
        width: 100%;
        flex-direction: column;
        clip-path: circle(50px at 90% -20%);
        -webkit-clip-path: circle(50px at 90% -10%);
        transition: all 1s ease-out;
        pointer-events: none;
    }
    .nav-links.open{
        clip-path: circle(1000px at 90% -10%);
        -webkit-clip-path: circle(1000px at 90% -10%);
        pointer-events: all;
    }
    .nav-links li{
        opacity: 0;
    }
    .nav-links li:nth-child(1){
        transition: all 0.5s ease 0.2s;
    }
    .nav-links li:nth-child(2){
        transition: all 0.5s ease 0.4s;
    }
    .nav-links li:nth-child(3){
        transition: all 0.5s ease 0.6s;
    }
    .nav-links li:nth-child(4){
        transition: all 0.5s ease 0.7s;
    }
    .nav-links li:nth-child(5){
        transition: all 0.5s ease 0.8s;
    }
    .nav-links li:nth-child(6){
        transition: all 0.5s ease 0.9s;
        margin: 0;
    }
    .nav-links li:nth-child(7){
        transition: all 0.5s ease 1s;
        margin: 0;
    }
    li.fade{
        opacity: 1;
    }
}

.toggle .line1{
  background-color:black;
    transform: rotate(-45deg) translate(-5px,6px);
}
.toggle .line2{
   background-color:black;
    transition: all 0.7s ease;
    width:0;
}
.toggle .line3{
   background-color:black;
    transform: rotate(45deg) translate(-5px,-6px);
}
!

JS 

              
                const hamburger = document.querySelector(".hamburger");
const navLinks = document.querySelector(".nav-links");
const links = document.querySelectorAll(".nav-links li");

hamburger.addEventListener('click', ()=>{
   //Animate Links
    navLinks.classList.toggle("open");
    links.forEach(link => {
        link.classList.toggle("fade");
    });

    //Hamburger Animation
    hamburger.classList.toggle("toggle");
});
!
999px

Console