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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>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

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CSS

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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

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JavaScript

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

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Babel includes JSX processing.

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HTML 

              
                <button class="inactive">
    <div class="icon"></div>
    <div class="text">
      Like<span>d</span>
    </div>
    <div class="numbers">
      <span>24</span>
      <span>25</span>
    </div>
</button>



<div class="info">
  <p>Wants to see this pen using <a href="https://www.w3.org/TR/css-nesting-1/" target="_blank">native CSS nesting</a>? go check this <a href="/Lukyvj/pen/PodzOmM" target="_blank">pen's native nesting counterpart </a></p>
</div>
!

CSS 

              
                @font-face {
  font-family: "Mona Sans";
  src: url("https://assets.codepen.io/64/Mona-Sans.woff2")
      format("woff2 supports variations"),
    url("https://assets.codepen.io/64/Mona-Sans.woff2")
      format("woff2-variations");
  font-weight: 100 1000;
}

@layer properties {
  @property --nb-1-tsy {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
  }
  @property --nb-2-tsy {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
  }
  @property --nb-1-op {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
  }
  @property --nb-2-op {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
  }
  @property --ic-op {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
  }
  @property --btn-scale {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
  }
   @property --ic-ts-x {
    syntax: "<number>";
    inherits: true;
    initial-value: 0;
  }
}

* {
  -webkit-font-smoothing: antialiased;
}

:root {
  --ic-thumb: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none' stroke='white' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' class='feather feather-thumbs-up'%3E%3Cpath d='M14 9V5a3 3 0 0 0-3-3l-4 9v11h11.28a2 2 0 0 0 2-1.7l1.38-9a2 2 0 0 0-2-2.3zM7 22H4a2 2 0 0 1-2-2v-7a2 2 0 0 1 2-2h3'/%3E%3C/svg%3E");

  /* COLORS */
  --eerie-black: hsla(0, 0%, 12%, 1);
  --night: hsla(0, 0%, 9%, 1);
  --black: hsla(0, 0%, 0%, 1);
  --battleship-gray: hsla(0, 0%, 55%, 0.8);

  /* ANIMATIONS VARS */
  --nb-1-tsy: 0;
  --nb-2-tsy: 100;

  --nb-1-op: 1;
  --nb-2-op: 0;
  
  --ic-op: 0.5;
  --ic-ts-x: 0;

  --btn-scale: 1;
  
}

html,
body {
  width: 100%;
  height: 100%;
  padding: 0;
  margin: 0;
}

body {
  background: hsl(0deg 0% 6%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Mona Sans", sans-serif;
}

button {
  font-weight: bold;
  color: white;
  padding: 1em;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(
    to bottom,
    var(--eerie-black),
    var(--night)
  );
  border: none;
  border-radius: 12px;
  box-shadow: inset 0 1px 1px rgba(255 255 255 / 12%), 0 2px 6px black;
  cursor: pointer;
  transform: scale(var(--btn-scale));
  position: relative;
  overflow: hidden;
  will-change: transform;
  
  /* Transition the variables ! */
  transition: 
      --nb-1-tsy 0.3s ease, 
      --nb-2-tsy 0.3s ease, 
      --nb-1-op 0.15s ease,
      --nb-2-op 0.15s ease,
      --ic-op 0.15s ease,
      --ic-ts-x 0.15s ease;

  & > div {
    height: 1.6rem;
    min-width: 1.6rem;
    display: flex;
    align-items: center;
  }

  & .icon {
    width: 1.6em;
    height: 1.6em;
    background: var(--ic-thumb) no-repeat center center / 70%;
    opacity: var(--ic-op);
    transform: translateX(calc(var(--ic-ts-x)*-1px))
  }

  & .text {
    font-size: 1.3em;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-left: 1rem;
    transform: translateX(calc(calc(var(--ic-ts-x)/3)*-1px));

    > span {
      display: none;
    }
  }

  & .numbers {
    flex-direction: column;
    position: relative;
    margin-left: 2em;
    font-variant-numeric: tabular-nums;
    font-size: 1.3em;
    

    &:before {
      content: "";
      display: block;
      width: 1px;
      height: 140%;
      background: rgba(255 255 255 / 20%);
      position: absolute;
      left: -50%;
      top: -16%;
    }

    > span {
      display: inline-flex;
      align-items: center;
      height: 100%;
      position: absolute;

      &:nth-child(1) {
        transform: translateY(calc(var(--nb-1-tsy) * -1%));
        color: rgba(255 255 255 / 50%);
        opacity: var(--nb-1-op);
      }
      &:nth-child(2) {
        transform: translateY(calc(var(--nb-2-tsy) * 1%));
        opacity: var(--nb-2-op);
      }
    }
  }

  &:hover {
    --ic-op: 1;
  }

  &.active {
    --nb-1-tsy: 100;
    --nb-2-tsy: 0;

    --nb-1-op: 0;
    --nb-2-op: 1;
    
    --ic-op: 1;
    --ic-ts-x: 40;


    & .text > span {
      display: inline-block;
    }
  }

  &.inactive {

  }
}


.btn-bounce {
  animation-name: bounce;
  animation-duration: 0.5s;
  animation-timing-function: ease;
}

@keyframes bounce {
  0% {
    --btn-scale: 1;
  }
  
  25% {
    --btn-scale: 0.98;
  }

  50% {
    --btn-scale: 1.02;
  }

  100% {
    --btn-scale: 1;
  }
}

/* debug*/
*,
*:before,
*:after {
  /*outline: 1px solid red;*/
}


.info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  color: white;
  margin: auto;
  padding: 1em;
  text-align: center;
  background: rgba(255 255 255 / 10%);
  
  & a {
    border-bottom: 1px dashed rgba(255 255 255 / 50%);
    text-decoration: none;
    color: white;
    
    &:hover {
      border-bottom: 1px dashed rgba(255 255 255 / 100%);
    }
  }
}
!

JS 

              
                const btn = document.querySelector("button");
btn.addEventListener("click", () => {
  btn.classList.toggle("active");
  btn.classList.toggle("btn-bounce");
  
  // Haven't found a smarter way to achieve that
  // Basically, I want the animation to repeat
  // when the user clicks a second time, so here
  // I'm toggling both classes, and then after
  // 500ms, I'm removing the bouncing class 
  // the animation takes 500ms to occur, so 
  // when the animation is done, we remove
  // the class enabling it.
  //
  // setTimeout(() => {
  //  btn.classList.remove("btn-bounce");
  // },500)
  //
  // thanks to 
  // Simon Coudeville (@simoncoudeville)
  // for suggesting using the animationend event
  // instead of the setTimeout! 
  // Thanks buddy! 
  btn.addEventListener("animationend", (event) => {
    btn.classList.remove("btn-bounce");
  });
});
!
999px

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