naive-ui/styles/Checkbox.scss

@import './mixins/mixins.scss';
@import './theme/default.scss';

@include b(checkbox-group) {
  .n-checkbox {
    margin-right: 18px;
  }
}

@include b(checkbox) {
  & {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .n-checkbox__label {
    user-select: none;
    cursor: pointer;
    font-size: 13px;
    color: #fff;
    margin-left: 8px;
  }
  .n-checkbox__checkbox {
    cursor: pointer;
    height: 14px;
    width: 14px;
    box-sizing: border-box;
    box-shadow: inset 0 0 0 1px $checkbox-border-color;
    background-color: transparent;
    border-radius: 4px;
    position: relative;
    transition: box-shadow .3s $default-cubic-bezier, background-color .3s $default-cubic-bezier;
    &:hover {
      box-shadow: inset 0 0 0 1px $checkbox-border-color--active;
    }
    &::before {
      box-sizing: content-box;
      content: "";
      border-bottom: 2px solid #5C647B;
      width: 8px;
      left: 3px;
      position: absolute;
      top: 6px;
      opacity: 0;
      transform: scale(.5);
      transform-origin: center;
      transition: transform .3s $default-cubic-bezier, opacity .3s $default-cubic-bezier, border-color .3s $default-cubic-bezier;
    }
    &::after {
      box-sizing: content-box;
      content: "";
      border: 1.5px solid #5C647B;
      border-left: 0;
      border-top: 0;
      height: 8px;
      left: 5px;
      position: absolute;
      top: 1px;
      opacity: 0;
      transform: rotate(45deg) scale(.5);
      width: 3px;
      transform-origin: center;
      transition: transform .3s $default-cubic-bezier, opacity .3s $default-cubic-bezier, border-color .3s $default-cubic-bezier;
    }
  }
  &.n-checkbox--checked {
    .n-checkbox__checkbox {
      background-color: $checkbox-background--active;
      box-shadow: inset 0 0 0 1px $checkbox-border-color--active;
      &::after {
        opacity: 1;
        transform: rotate(45deg) scale(1);
      }
    }
  }
  &.n-checkbox--indeterminate {
    .n-checkbox__checkbox {
      background-color: $checkbox-background--active;
      box-shadow: inset 0 0 0 1px $checkbox-border-color--active;
      &::after {
        opacity: 0;
      }
      &::before {
        opacity: 1;
        transform: scale(1);
      }
    }
  }
  &.n-checkbox--disabled {
    .n-checkbox__checkbox {
      cursor: not-allowed;
      background-color: rgba(255,255,255,.4);
      box-shadow: inset 0 0 0 1px $checkbox-border-color;
      &::after {
        border: 1.5px solid rgba(255,255,255,.4);
        border-left: 0;
        border-top: 0;
      }
      &::before {
        border-bottom: 1.5px solid rgba(255,255,255,.4);
      }
    }
  }
}