iview/styles/components/switch.less

@switch-prefix-cls: ~"@{css-prefix}switch";

.@{switch-prefix-cls} {
    display: inline-block;
    width: 44px;
    height: 24px;
    line-height: 22px;
    border-radius: 22px;
    vertical-align: middle;
    border: 1px solid #ccc;
    background-color: #ccc;
    position: relative;
    cursor: pointer;
    user-select: none;
    .transition(all @transition-time @ease-in-out);

    &-inner {
        color: #fff;
        font-size: 12px;
        position: absolute;
        left: 24px;
    }

    &:after {
        content: '';
        width: 22px;
        height: 22px;
        border-radius: 50%;
        background-color: #fff;
        position: absolute;
        left: 0;
        top: 0;
        cursor: pointer;
        .transition2(left @transition-time @ease-in-out, width @transition-time @ease-in-out);
    }

    &:active:after {
        width: 26px;
    }

    &:focus {
        box-shadow: 0 0 0 2px fade(@primary-color, 20%);
        outline: 0;
    }

    &:focus:hover {
        box-shadow: none;
    }

    &-small {
        height: 14px;
        line-height: 12px;
        width: 28px;
        &:after {
            width: 12px;
            height: 12px;
            top: 0;
            left: 0;
        }
        &:active:after {
            width: 16px;
        }
    }

    &-small&-checked:after {
        left: 14px;
    }

    &-small:active&-checked:after {
        left: 10px;
    }

    &-checked {
        border-color: @primary-color;
        background-color: @primary-color;

        .@{switch-prefix-cls}-inner {
            left: 6px;
        }

        &:after {
            left: 20px;
        }

        &:active:after {
            left: 16px;
        }
    }

    &-disabled {
        cursor: @cursor-disabled;
        background: #f3f3f3;
        border-color: #f3f3f3;

        &:after {
            background: #ccc;
            cursor: not-allowed;
        }

        .@{switch-prefix-cls}-inner {
            color: #ccc;
        }
    }
}