nutui/src/packages/switch/switch.scss

.nut-switch {
	position: relative;
	display: inline-block;
	background: #eee;
	border-radius: 20px;
	vertical-align: bottom;
	box-sizing: content-box;
	border: 0;
	transition: all $transition-duration $animation-timing-fun;
	.nut-switch-btn {
		position: absolute;
		left: 0;
		background: #fff;
		border: 0;
		border-radius: 50%;
		box-sizing: border-box;
        transition: all $transition-duration $animation-timing-fun;
        box-shadow: 0px 1px 6px 0px rgba(0,0,0,.1);
	}

	&.nut-switch-active {
		background-color: $primary-color-jd-red;
	}

	&.nut-switch-disabled {
		opacity: 0.6;
	}
}

.nut-switch-base {
	height: 28px;
	width: 54px;

	.nut-switch-btn {
		height: 28px;
		width: 28px;
	}

	&.nut-switch-active {
		.nut-switch-btn {
			left: 28px;
		}
	}
}

.nut-switch-small {
	height: 20px;
	width: 38px;

	&.nut-switch {
		border-radius: 11px;
	}

	.nut-switch-btn {
		height: 20px;
		width: 20px;
	}

	&.nut-switch-active {
		.nut-switch-btn {
			left: 19px;
		}
	}
}