DragEvent

Das drag Event wird ausgelöst, wenn ein Element oder ein Text "gezogen" wird (alle paar hundert Millisekunden).

Allgemeine Informationen

Spezifikation
HTML5
Interface
DragEvent
Steigt auf
Ja
Abbrechbar
Ja
Ziel
Document, Element
Standard-Aktion
Mit der drag & drop Operation fortfahren.

Eigenschaften

Property Type Description
target Read only EventTarget The element being dragged.
type Read only DOMString The type of event.
bubbles Read only boolean Does the event normally bubble?
cancelable Read only boolean Is it possible to cancel the event?
view Read only WindowProxy document.defaultView (window des Dokuments)
detail Read only long (float) 0.
dataTransfer DataTransfer The data that underlies a drag-and-drop operation, known as the drag data store. Protected mode.
currentTarget Read only EventTarget The node that had the event listener attached.
relatedTarget Read only EventTarget For mouseover, mouseout, mouseenter and mouseleave events: the target of the complementary event (the mouseleave target in the case of a mouseenter event). null otherwise.
screenX Read only long The X coordinate of the mouse pointer in global (screen) coordinates.
screenY Read only long The Y coordinate of the mouse pointer in global (screen) coordinates.
clientX Read only long The X coordinate of the mouse pointer in local (DOM content) coordinates.
clientY Read only long The Y coordinate of the mouse pointer in local (DOM content) coordinates.
button Read only unsigned short The button number that was pressed when the mouse event was fired: Left button=0, middle button=1 (if present), right button=2. For mice configured for left handed use in which the button actions are reversed the values are instead read from right to left.
buttons Read only unsigned short The buttons being pressed when the mouse event was fired: Left button=1, Right button=2, Middle (wheel) button=4, 4th button (typically, "Browser Back" button)=8, 5th button (typically, "Browser Forward" button)=16. If two or more buttons are pressed, returns the logical sum of the values. E.g., if Left button and Right button are pressed, returns 3 (=1 | 2). More info.
mozPressure Read only float The amount of pressure applied to a touch or tabdevice when generating the event; this value ranges between 0.0 (minimum pressure) and 1.0 (maximum pressure).
ctrlKey Read only boolean true if the control key was down when the event was fired. false otherwise.
shiftKey Read only boolean true if the shift key was down when the event was fired. false otherwise.
altKey Read only boolean true if the alt key was down when the event was fired. false otherwise.
metaKey Read only boolean true if the meta key was down when the event was fired. false otherwise.

Beispiel

<div class="dropzone">
    <div id="draggable" draggable="true" ondragstart="event.dataTransfer.setData('text/plain',null)">
        This div is draggable
    </div>
</div>
<div class="dropzone"></div>
<div class="dropzone"></div>
<div class="dropzone"></div>

<style>
  #draggable {
    width: 200px;
    height: 20px;
    text-align: center;
    background: white;
  }

  .dropzone {
    width: 200px;
    height: 20px;
    background: blueviolet;
    margin-bottom: 10px;
    padding: 10px;
  }
</style>

<script>
  var dragged;

  /* Event wird vom ge-drag-ten Element ausgelöst */
  document.addEventListener("drag", function( event ) {

  }, false);

  document.addEventListener("dragstart", function( event ) {
      // Speichern einer ref auf das drag-bare Element
      dragged = event.target;
      // Element halb-transparent machen
      event.target.style.opacity = .5;
  }, false);

  document.addEventListener("dragend", function( event ) {
      // Transparenz zurücksetzen
      event.target.style.opacity = "";
  }, false);

  /* events fired on the drop targets */
  document.addEventListener("dragover", function( event ) {
      // Standard-Aktion verhindern um das drop-Event zu erlauben
      event.preventDefault();
  }, false);

  document.addEventListener("dragenter", function( event ) {
      // Hintergrund des möglichen Drop-Zeils anfärben, wenn das drag-bare Element auf das Ziel gezogen wird
      if ( event.target.className == "dropzone" ) {
          event.target.style.background = "purple";
      }

  }, false);

  document.addEventListener("dragleave", function( event ) {
      // Hintergrund des möglichen Drop-Ziels, wenn das drag-bare Element vom Ziel wieder weggezogen wird / verlässt
      if ( event.target.className == "dropzone" ) {
          event.target.style.background = "";
      }
  }, false);

  document.addEventListener("drop", function( event ) {
      // Standard-Aktion verhindern (Bei einigen Elementen wäre das das Öffnen als Link)
      event.preventDefault();
      // move dragged elem to the selected drop target
      if ( event.target.className == "dropzone" ) {
          event.target.style.background = "";
          dragged.parentNode.removeChild( dragged );
          event.target.appendChild( dragged );
      }
    
  }, false);
</script>

Verwandte Events

Schlagwörter des Dokuments und Mitwirkende

 Mitwirkende an dieser Seite: ulrobin
 Zuletzt aktualisiert von: ulrobin,