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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-.

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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 

              
                <blockquote class="random-quote">
  <p id="new-quote"></p>
   <cite id="author"></cite>
</blockquote>
!

CSS 

              
                /* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
  display: block;
}
body {
  line-height: 1;
}
ol, ul {
  list-style: none;
}
blockquote, q {
  quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
  content: '';
  content: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/*************************************************************************************************************************/

html, body {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #23074d;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #cc5333, #23074d);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to right, #cc5333, #23074d); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}

.random-quote {
  -webkit-filter: drop-shadow(-1px -1px 2px rgba(0, 0, 0, 0.1)) drop-shadow(1px 2px 2px rgba(0, 0, 0, 0.15));
          filter: drop-shadow(-1px -1px 2px rgba(0, 0, 0, 0.1)) drop-shadow(1px 2px 2px rgba(0, 0, 0, 0.15));
  margin: 1rem;
  margin-bottom: 40px;
  position: relative;
  font-family: 'Montserrat', sans-serif;
  font-size: 1.2rem;
  font-weight: 400;
  background: #C95233; 
  color: white;
  max-width: 40vw;
  line-height: 1.4;
}

#new-quote {
  padding: 1.5rem 2rem;
  cursor: pointer;
  min-width: 10vw;
  display: flex;
}

p#new-quote {
  justify-content: center;
}

.random-quote::before {
  border: 12.5px solid transparent;
  border-top: 12.5px solid #C95233;
  border-bottom: 0;
  height: 0;
  width: 0;
  border-top-width: 25px;
  content: '';
  display: block;
  position: absolute;
  left: 3rem;
  bottom: -25px;
  -webkit-transform-origin: center;
          transform-origin: center;
  -webkit-transform: rotate(90deg) skew(-25deg) translateY(16.6666666667px);
          transform: rotate(90deg) skew(-25deg) translateY(16.6666666667px);
}

.random-quote cite {
  position: absolute;
  bottom: -2rem;
  left: 4.5rem;
  font-size: 1rem;
  font-style: normal;
  font-weight: 300;
  letter-spacing: 0.5px;
  color: white;
}
!

JS 

              
                /* 
    Random Quote Generator - Pulls a random from the array of quotes
*/

let quoteArray = [
    {
        content: "Let's get crazy!",
        author: "Bob Ross"
    },
    {
        content: "Wash the brush, just beats the devil out of it!",
        author: "Bob Ross"
    },
    {
        content: "Nah.",
        author: "Rosa Parks"
    },
    {
        content: "That is the key to navigating this life — don't take it too seriously. That's when the party begins.",
        author: "Ru Paul"
    },
    {
        content: "May the forces of evil become confused on the way to your house",
        author: "George Carlin"
    },
    {
        content: "Just cause you got the monkey off your back doesn't mean the circus has left town.",
        author: "George Carlin"
    },
    {
        content: "Life is 10% what happens to you and 90% how you react to it.",
        author: "Charles R. Swindoll"
    },
    {
        content: "Cynicism masquerades as wisdom, but it is the furthest thing from it. Because cynics don't learn anything. Because cynicism is a self-imposed blindness: a rejection of the world because we are afraid it will hurt us or disappoint us. Cynics always say 'no.' But saying 'yes' begins things. Saying 'yes' is how things grow.",
        author: "Stephen Colbert"
    },
    {
        content: "You can't really be passionately moderate. It's like wearing an 'Extra Medium' - it doesn't exist.",
        author: "Stephen Colbert"
    },
    {
        content: "There's an old saying about those who forget history. I don't remember it, but it's good.",
        author: "Stephen Colbert"
    },
    {
        content: "The Internet is just a world passing around notes in a classroom.",
        author: "Jon Stewart"
    },
    {
        content: "Confidence is 10% hard work and 90% delusion.",
        author: "Tina Fey"
    },
    {
        content: "The evil that is in the world almost always comes of ignorance, and good intentions may do as much harm as malevolence if they lack understanding.",
        author: "Albert Camus"
    },
    {
        content: "Blessed are the hearts that can bend; they shall never be broken.",
        author: "Albert Camus"
    }

];

//Setup html elements
let button = document.getElementById('new-quote'),
    quote = document.getElementById('new-quote'),
    author = document.getElementById('author');

//Generate a Random Quote
window.onload = randomQuote;
button.addEventListener('click', randomQuote);

//Random quote function
function randomQuote (){
    //Get a random number to pick a random quote object
    const random = Math.floor(Math.random() * quoteArray.length);
    //Get the quote content
    quote.innerHTML = quoteArray[random].content;
    //Get the quote author
    author.innerHTML = '&mdash; ' + quoteArray[random].author;
}
!
999px

Console