下面是一个使用ES6语法的更现代化的版本。

let dropzoneId = 'dropzone' const dragEventHandler = e => { if (e.target.id !== dropzoneId) { e.preventDefault e.dataTransfer.effectAllowed = 'none' e.dataTransfer.dropEffect = 'none' } } // window.addEventListener("dragenter", dragEventHandler, false) // window.addEventListener("dragover", dragEventHandler, false) // window.addEventListener("drop", dragEventHandler, false) ['dragenter', 'dragover', 'drop'].forEach(ev => window.addEventListener(ev, dragEventHandler, false)) <div id="dropzone">...</div>

下面是一个使用ES6语法的更现代化的版本。

let dropzoneId = 'dropzone' const dragEventHandler = e => { if (e.target.id !== dropzoneId) { e.preventDefault e.dataTransfer.effectAllowed = 'none' e.dataTransfer.dropEffect = 'none' } } // window.addEventListener("dragenter", dragEventHandler, false) // window.addEventListener("dragover", dragEventHandler, false) // window.addEventListener("drop", dragEventHandler, false) ['dragenter', 'dragover', 'drop'].forEach(ev => window.addEventListener(ev, dragEventHandler, false)) <div id="dropzone">...</div>

为了只允许在某些元素上进行拖放，你可以这样做:

window.addEventListener("dragover",function(e){
  e = e || event;
  console.log(e);
  if (e.target.tagName != "INPUT") { // check which element is our target
    e.preventDefault();
  }
},false);
window.addEventListener("drop",function(e){
  e = e || event;
  console.log(e);
  if (e.target.tagName != "INPUT") {  // check which element is our target
    e.preventDefault();
  }  
},false);

为了它的价值，我使用以下。如果不是特别优雅的话，可能会很好，很明确?

var myDropZone = document.getElementById('drop_zone');

// first, inhibit the default behaviour throughout the window
window.addEventListener('drop', () => { 
  event.preventDefault(); 
} );
window.addEventListener('dragover', () => { 
  event.dataTransfer.dropEffect = 'none'; // dont allow drops
  event.preventDefault(); 
} );

// Next, allow the cursor to show 'copy' as it is dragged over 
// my drop zone but dont forget to stop the event propagating

myDropZone.addEventListener('dragover', () => { 
  event.dataTransfer.dropEffect = 'copy';
  event.stopPropagation(); // important !!
  event.preventDefault();
} );

// In my drop zone, deal with files as they are dropped
myDropZone.addEventListener('drop', myDropHandler);

试试这个:

document.body.addEventListener('drop', function(e) {
    e.preventDefault();
}, false);

jQuery的正确答案将是:

$(document).on({
    dragover: function() {
        return false;
    },
    drop: function() {
        return false;
    }
});

这里返回false将表现为event.preventDefault()和event.stopPropagation()。