HTML事件屬性ondragstart
HTML事件屬性ondragstart
觸發ondragstart
屬性當開始拖動元素或文本選擇。
要使元素可拖動,請標記該元素與全局HTML5draggable
屬性。
默認情況下,鏈接和圖像是可拖動的。
在draggable源元素上觸發的事件:
- ondragstart - starting dragging
- ondrag - during the dragging
- ondragend - finish dragging
投放目標上觸發的事件:
- ondragenter - when the dragged element enters the droppable target
- ondragover - when the dragged element is over the droppable target
- ondragleave - when the dragged element leaves the droppable target
- ondrop - when the dragged element is dropped on the droppable target
HTML5中的新功能
ondragstart
屬性是HTML5中的新特性。
句法
<element ondragstart="script or Javascript function name">
支持的標簽
所有HTML元素
瀏覽器兼容性
ondragstart | Yes | 9.0 | Yes | Yes | Yes |
例子
<!DOCTYPE HTML>
<html>
<head>
<style>
#droptarget {float:left;width: 200px;height: 35px;margin: 55px;margin-top: 155px;padding: 10px;border: 1px solid black;
}
</style>
</head>
<body>
<p ondragstart="dragStart(event)" draggable="true" id="dragtarget">Drag me into the rectangle!</p>
<div id="droptarget" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<script>
function dragStart(event) {
event.dataTransfer.setData("Text", event.target.id);
}
function allowDrop(event) {
event.preventDefault();
console.log("OVER.");
}
function drop(event) {
event.preventDefault();vardata = event.dataTransfer.getData("Text");
event.target.appendChild(document.getElementById(data));
console.log("dropped.");
}
</script>
</body>
</html>
Click to view the demo