在其他一些回答中提到的“检查目标”方法的基础上，这里有一个更通用/实用的方法:

function preventDefaultExcept(predicates) {
  return function (e) {
    var passEvery = predicates.every(function (predicate) { return predicate(e); })
    if (!passEvery) {
      e.preventDefault();
    }
  };
}

被称为:

function isDropzone(e) { return e.target.id === 'dropzone'; }
function isntParagraph(e) { return e.target.tagName !== 'p'; }

window.addEventListener(
  'dragover',
  preventDefaultExcept([isDropzone, isntParagraph])
);
window.addEventListener(
  'drop',
  preventDefaultExcept([isDropzone])
);

在其他一些回答中提到的“检查目标”方法的基础上，这里有一个更通用/实用的方法:

function preventDefaultExcept(predicates) {
  return function (e) {
    var passEvery = predicates.every(function (predicate) { return predicate(e); })
    if (!passEvery) {
      e.preventDefault();
    }
  };
}

被称为:

function isDropzone(e) { return e.target.id === 'dropzone'; }
function isntParagraph(e) { return e.target.tagName !== 'p'; }

window.addEventListener(
  'dragover',
  preventDefaultExcept([isDropzone, isntParagraph])
);
window.addEventListener(
  'drop',
  preventDefaultExcept([isDropzone])
);

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);

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()。

您可以向窗口添加一个事件监听器，在所有拖放事件上调用preventDefault()。 例子:

window.addEventListener("dragover",function(e){
  e = e || event;
  e.preventDefault();
},false);
window.addEventListener("drop",function(e){
  e = e || event;
  e.preventDefault();
},false);

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);