vant/packages/button/index.less

@import '../style/var';

.van-button {
  display: inline-block;
  position: relative;
  padding: 0;
  height: @button-default-height;
  line-height: @button-default-line-height;
  font-size: @button-default-font-size;
  border-radius: @button-border-radius;
  text-align: center;
  box-sizing: border-box;
  -webkit-appearance: none;
  -webkit-text-size-adjust: 100%;

  &::before {
    content: " ";
    position: absolute;
    top: 50%;
    left: 50%;
    opacity: 0;
    width: 100%;
    height: 100%;
    border: inherit;
    border-color: @black;
    background-color: @black;
    border-radius: inherit; /* inherit parent's border radius */
    transform: translate(-50%, -50%);
  }

  &:active::before {
    opacity: .1;
  }

  &--loading,
  &--disabled {
    &::before {
      display: none;
    }
  }

  &--default {
    color: @button-default-color;
    background-color: @button-default-background-color;
    border: @button-border-width solid @button-default-border-color;
  }

  &--primary {
    color: @button-primary-color;
    background-color: @button-primary-background-color;
    border: @button-border-width solid @button-primary-border-color;
  }

  &--info {
    color: @button-info-color;
    background-color: @button-info-background-color;
    border: @button-border-width solid @button-info-border-color;
  }

  &--danger {
    color: @button-danger-color;
    background-color: @button-danger-background-color;
    border: @button-border-width solid @button-danger-border-color;
  }

  &--warning {
    color: @button-warning-color;
    background-color: @button-warning-background-color;
    border: @button-border-width solid @button-warning-border-color;
  }

  &--plain {
    background-color: @button-plain-background-color;

    &.van-button--primary {
      color: @button-primary-background-color;
    }

    &.van-button--info {
      color: @button-info-background-color;
    }

    &.van-button--danger {
      color: @button-danger-background-color;
    }

    &.van-button--warning {
      color: @button-warning-background-color;
    }
  }

  &--large {
    width: 100%;
    height: @button-large-height;
    line-height: @button-large-line-height;
  }

  &--normal {
    padding: 0 15px;
    font-size: @button-normal-font-size;
  }

  &--small {
    padding: 0 8px;
    height: @button-small-height;
    min-width: @button-small-min-width;
    font-size: @button-small-font-size;
    line-height: @button-small-line-height;
  }

  &--loading {
    .van-loading {
      display: inline-block;
    }
  }

  &--mini {
    display: inline-block;
    height: @button-mini-height;
    min-width: @button-mini-min-width;
    font-size: @button-mini-font-size;
    line-height: @button-mini-line-height;

    & + .van-button--mini {
      margin-left: 5px;
    }
  }

  &--block {
    width: 100%;
    display: block;
  }

  &--bottom-action {
    border: 0;
    width: 100%;
    height: 50px;
    font-size: 16px;
    line-height: 50px;
    border-radius: 0;
    color: @button-bottom-action-default-color;
    background-color: @button-bottom-action-default-background-color;

    &.van-button--primary {
      background-color: @button-bottom-action-primary-background-color;
    }
  }

  &--disabled {
    opacity: @button-disabled-opacity;
  }

  &--round {
    border-radius: @button-round-border-radius;
  }

  &--square {
    border-radius: 0;
  }

  &__loading-text {
    margin-left: 5px;
    display: inline-block;
    vertical-align: middle;
  }

  &--hairline {
    border-width: 0;

    &::after {
      border-color: inherit;
      border-radius: @button-border-radius * 2;
    }

    &.van-button--round::after {
      border-radius: @button-round-border-radius;
    }
    
    &.van-button--square::after {
      border-radius: 0;
    }
  }
}