标题Vue自定义拖动指令v-drag

Vue封装自定义全局指令，可以在页面中进行拖动,

1. vue自定义全局指令

Vue.directive('drag', {
	inserted: function (el) {
		let odiv = null, disX, disY
		el.addEventListener('mousedown', dragMove)
		function dragMove(e) {
			odiv = e.currentTarget;
			disX = e.clientX - odiv.offsetLeft;
			disY = e.clientY - odiv.offsetTop;
			document.addEventListener('mousemove', dragDomMove)
			document.addEventListener('mouseup', dragDomUp)
		}
		function dragDomMove(e) {
			let left = e.clientX - disX;
			let top = e.clientY - disY;
			if (left < 0) {
				left = 0;
			}
			if (top < 0) {
				top = 0;
			}
			if (left >= document.documentElement.clientWidth - odiv.offsetWidth) {
				left = document.documentElement.clientWidth - odiv.offsetWidth;
			}
			if (top >= document.documentElement.clientHeight - odiv.offsetHeight) {
				top = document.documentElement.clientHeight - odiv.offsetHeight;
			}

			//移动当前元素
			odiv.style.left = left + "px";
			odiv.style.top = top + "px";
		}
		function dragDomUp(e) {
			document.removeEventListener('mousemove', dragDomMove)
			document.removeEventListener('mouseup', dragDomUp)
		}
	}
})

防止其他按钮点击进行穿透自定义防止拖动指令
2. 自定义防止拖动指令

Vue.directive('stopdrag', {
	inserted: function (el, binding, vnode) {
		let element = el;
		element.onmousedown = function (e) {
			e.stopPropagation()
		}
	}
})

4. 页面中使用

<div class="info" v-drag>
	<button v-stopdrag></button>
</div>