index.marko

class {
    onCreate(){
      this.state = {
          btnClass: "btn"
      };
    }

    onInput(input){
      if(input.color){
        this.state.btnClass += " btn-" + input.color;
      }

      if(input.bold){
        this.state.btnClass += " btn-bold";
      }

      if(input.size){
        this.state.btnClass += " btn-" + input.size;
      }
    }

    onMount(){

    }

    onButtonClick(event, el){
        if(this.input.emitOnClick){
            var event = new Event(this.input.emitOnClick);
            document.dispatchEvent(event);
        }

        this.emit('click');
    }
}

<div.btn-wrap>
  <button class=state.btnClass on-click("onButtonClick")>
      <include(input.text)/>
  </button>
</div>

style.scss {

  $colors: (
    white: #FEFEFE,
    red: #FF1654,
    blue: #247BA0,
    paleYellow: #F3FFBD,
    paleGreen: #B2DBBF,
    green: #70C1B3,
    lightGray: #CCCCCC,
    gray: #888888,
    black: #000000
  );

  .btn-wrap {
    display: flex;
  }

  .btn {
    background: #fafafa;
    border: 1px solid #a1a9ba;
    border-radius: 2px;
    color: #2e333e;
    cursor: pointer;
    display: flex;
    font-size: 1rem;
    text-align: center;
    text-decoration: none;
    user-select: none;
    vertical-align: middle;
    align-content: center;
    display: flex;
    justify-content: center;
    height: 40px;
    min-width: 180px;
    white-space: nowrap;
    box-shadow: 0px 1px 0px #c3c3c3, inset 0px -1px 0px 1px #e0e0e0;
    padding: 0px 10px;
  }

  .btn:focus, .btn:hover {
    background: #ffffff;
    text-decoration: none;
    outline: none;
  }

  .btn.active, .btn:active {
    background: #efefef;
    text-decoration: none;
    margin-top: 1px;
    margin-bottom: -1px;
    outline: none;
    box-shadow: inset 0px -1px 0px 1px #e0e0e0;
  }

  @each $colorName, $colorValue in $colors {
    $textColor: #2e333e;
    $strokeColor: black;
    $strokeAlpha: 0.13;

    @if (lightness($colorValue) < 60) {
      $textColor: white;
    }

    .btn-#{$colorName} {
      background-color: $colorValue;
      border: 1px solid rgba(black, 0.3);
      box-shadow: 0px 1px 0px rgba($strokeColor, $strokeAlpha), inset 0px -1px 0px 1px  rgba($strokeColor, $strokeAlpha);
      color: $textColor;

      &:focus, &:hover {
        background-color: lighten($colorValue, 5);
      }

      &:active {
        background-color: darken($colorValue, 1);
        box-shadow: 0px 1px 0px transparent, inset 0px -1px 0px 1px saturate($colorValue, 5);
      }
    }
  }

  .btn-bold {
    font-weight: bold;
  }

  .btn-xs {
    font-size: 0.6rem;
    height: 20px;
    min-width: 100px;
  }

  .btn-sm {
    font-size: 0.8rem;
    height: 30px;
    min-width: 140px;
  }

  .btn-md {
    font-size: 1rem;
    height: 40px;
    min-width: 180px;
  }

  .btn-lg {
    font-size: 1.2rem;
    height: 50px;
    min-width: 220px;
  }

  .btn-xl {
    font-size: 1.4rem;
    height: 60px;
    min-width: 260px;
  }
}