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[英]setDragImage Doesn't Work In Safari, But Works In Chrome (HTML Drag API)
[英]HTML5 Draggable setDragImage doesn't work with canvas on Chrome
我正在尝试使用画布作为本机HTML5拖放API中的拖动图像。
问题是它可以在Firefox上运行,但不能在Chrome(58)上运行,我无法查明问题所在。
代码: https : //jsfiddle.net/196urLwd/5/
<div id="thing" draggable="true">DRAG ME</div>
function onDragStart(event){
var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');
canvas.width = 100;
canvas.height = 20;
context.fillStyle = '#333333';
context.fillRect(0, 0, canvas.width, canvas.height);
context.fillStyle = '#999999';
context.font = 'bold 13px Arial';
context.fillText('DRAGGING...', 5, 15);
event.dataTransfer.setData('text', 'lorem ipsum');
event.dataTransfer.effectAllowed = 'copy';
event.dataTransfer.setDragImage(canvas, -15, 9);
};
var theThing = document.getElementById('thing');
theThing.addEventListener('dragstart', onDragStart, false);
我究竟做错了什么?
Chrome似乎要求将画布放入dom
document.body.append(canvas);
并用一些CSS隐藏它
canvas{
position:absolute;
left:-100%;
}
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