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drag if over top border
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Title</title> | |
| <style> | |
| body { | |
| margin: 0 auto; | |
| text-align: center; | |
| } | |
| .container { | |
| width: 100%; | |
| height: 100%; | |
| display: block; | |
| } | |
| #drag-if { | |
| display: inline-block; | |
| width:300px; | |
| height: 200px; | |
| border: solid thin lightgray; | |
| border-top: solid 100px black; | |
| } | |
| </style> | |
| <script src="script.js" type="text/javascript"></script> | |
| </head> | |
| <body> | |
| <div class="container"> | |
| <div id="drag-if" draggable="false" onmouseover="setDraggable()" onmouseout="setNotDraggable()"></div> | |
| </div> | |
| </body> | |
| </html> |
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| function setDraggable() { | |
| var elem = document.getElementById('drag-if'); | |
| var topBorder = parseInt(getComputedStyle(document.getElementById('drag-if'),null).getPropertyValue('border-top-width')); | |
| if(event.clientY < topBorder) { | |
| elem.setAttribute('draggable', true); | |
| } | |
| else { | |
| elem.setAttribute('draggable', false); | |
| } | |
| } | |
| function setNotDraggable() { | |
| var elem = document.getElementById('drag-if'); | |
| elem.setAttribute('draggable', false); | |
| } |
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