ant-design/components/button/style/mixin.less

// mixins for button
// ------------------------
.button-size(@padding; @font-size; @border-radius) {
  padding: @padding;
  font-size: @font-size;
  border-radius: @border-radius;
}

.button-disabled() {
  &.disabled,
  &[disabled] {
    &,
    &:hover,
    &:focus,
    &:active,
    &.active {
      .button-color(@btn-disable-color; @btn-disable-bg; @btn-disable-border);
    }
  }
}

.button-variant-primary(@color; @background) {
  .button-color(@color; @background; @background);
  &:hover,
  &:focus {
    .button-color(@color; ~`colorPalette("@{background}", 5)`; ~`colorPalette("@{background}", 5)`);
  }

  &:active,
  &.active {
    .button-color(@color; ~`colorPalette("@{background}", 7)`; ~`colorPalette("@{background}", 7)`);
  }

  .button-disabled();
}

.button-variant-other(@color; @background; @border) {
  .button-color(@color; @background; @border);

  &:hover,
  &:focus {
    .button-color(@primary-color; @background; @primary-color);
  }

  &:active,
  &.active {
    .button-color(@primary-7; @background; @primary-7);
  }

  .button-disabled();
}

.button-variant-ghost(@color) {
  .button-color(@color; transparent; @color);

  &:hover,
  &:focus {
    .button-color(~`colorPalette("@{color}", 5)`; transparent; ~`colorPalette("@{color}", 5)`);
  }

  &:active,
  &.active {
    .button-color(~`colorPalette("@{color}", 7)`; transparent; ~`colorPalette("@{color}", 7)`);
  }

  .button-disabled();
}

.button-color(@color; @background; @border) {
  color: @color;
  background-color: @background;
  border-color: @border;
  // a inside Button which only work in Chrome
  // http://stackoverflow.com/a/17253457
  > a:only-child {
    color: currentColor;
    &:after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      bottom: 0;
      right: 0;
      background: transparent;
    }
  }
}

.button-group-base(@btnClassName) {
  position: relative;
  display: inline-block;
  > .@{btnClassName} {
    position: relative;
    z-index: 1;

    &:hover,
    &:focus,
    &:active,
    &.active {
      z-index: 2;
    }

    &:disabled {
      z-index: 0;
    }
  }

  // size
  &-lg > .@{btnClassName} {
    .button-size(@btn-padding-lg; @btn-font-size-lg; @btn-border-radius-base);
  }

  &-sm > .@{btnClassName} {
    .button-size(@btn-padding-sm; @font-size-base; @btn-border-radius-sm);
    > .@{iconfont-css-prefix} {
      font-size: @font-size-base;
    }
  }
}

// Base styles of buttons
// --------------------------------------------------
.btn() {
  display: inline-block;
  margin-bottom: 0;
  font-weight: @btn-font-weight;
  text-align: center;
  touch-action: manipulation;
  cursor: pointer;
  background-image: none;
  border: @border-width-base @border-style-base transparent;
  white-space: nowrap;
  line-height: @line-height-base;
  .button-size(@btn-padding-base; @font-size-base; @btn-border-radius-base);
  user-select: none;
  transition: all .3s @ease-in-out;
  position: relative;

  > .@{iconfont-css-prefix} {
    line-height: 1;
  }

  &,
  &:active,
  &:focus {
    outline: 0;
  }

  &:not([disabled]):hover {
    text-decoration: none;
  }