front-kek/src/app/demos/chess-knight-moves/styles.scss at main · kainanaina/front-kek · GitHub

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.chess {
  $parentRef: &;

  // default values, overridden by react component
  --box-size: 60px;
  --x-size: 6;
  --y-size: 6;
  --knight-x: 3;
  --knight-y: 3;
  --step-at: 0.2s;

  display: flex;
  flex-shrink: 0;
  width: calc(var(--box-size) * var(--x-size));
  height: calc(var(--box-size) * var(--y-size));

  @mixin isMoving {
    #{$parentRef}.s--moving & {
      @content;
    }
  }

  @keyframes fadeInKnight {
    to {
      opacity: 0.5;
    }
  }

  &__knight {
    position: absolute;
    left: 0;
    top: 0;
    width: var(--box-size);
    height: var(--box-size);
    will-change: transform, opacity;
    transition: transform var(--step-at), opacity 0.3s;
    transform: translate(
      calc(var(--knight-x) * var(--box-size)),
      calc(var(--knight-y) * var(--box-size))
    );
    opacity: 0;
    animation: fadeInKnight 1s 0.5s forwards;

    @include isMoving {
      opacity: 1;
    }
  }

  &__box {
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    width: var(--box-size);
    height: var(--box-size);
    // border: 1px solid #333;
    font-size: 20px;

    @keyframes fadeIn {
      to {
        opacity: 1;
      }
    }

    p {
      opacity: 0;
      will-change: opacity;
      animation: fadeIn var(--step-at) calc(var(--step-at) * calc(var(--move-index) + 1)) forwards;
    }
  }

  @keyframes animateBorder {
    to {
      transform: scale(1, 1);
    }
  }

  &__line {
    position: absolute;
    background: #333;
    will-change: transform;
    animation: animateBorder 1s calc(0.2s + var(--delay, 0) * 0.2s) forwards;

    &--x {
      left: 0;
      top: calc(var(--y, 0) * var(--box-size));
      width: 100%;
      height: 1px;
      transform: scale(0, 1);
    }

    &--y {
      left: calc(var(--x, 0) * var(--box-size));
      top: 0;
      width: 1px;
      height: 100%;
      transform: scale(1, 0);
    }
  }
}