Experimental: Cette fonction est expérimentale
Puisque cette fonction est toujours en développement dans certains navigateurs, veuillez consulter le tableau de compatibilité pour les préfixes à utiliser selon les navigateurs.
Il convient de noter qu'une fonctionnalité expérimentale peut voir sa syntaxe ou son comportement modifié dans le futur en fonction des évolutions de la spécification.

The HTMLDialogElement interface provides methods to manipulate <dialog> elements. It inherits properties and methods from the HTMLElement interface.


Inherits properties from its parent, HTMLElement. (en-US)

A Boolean (en-US) reflecting the open HTML attribute, indicating whether the dialog is available for interaction.

HTMLDialogElement.returnValue (en-US)

A DOMString that sets or returns the return value for the dialog.


Inherits methods from its parent, HTMLElement.

HTMLDialogElement.close() (en-US)

Closes the dialog. An optional DOMString may be passed as an argument, updating the returnValue of the the dialog. (en-US)

Displays the dialog modelessly, i.e. still allowing interaction with content outside of the dialog.

HTMLDialogElement.showModal() (en-US)

Displays the dialog as a modal, over the top of any other dialogs that might be present. Interaction outside the dialog is blocked.



Fired when the dialog is closed. Also available via the onclose property.


The following example shows a simple button that, when clicked, opens a <dialog> containing a form via the HTMLDialogElement.showModal() (en-US) function. From there you can click the Cancel button to close the dialog (via the HTMLDialogElement.close() (en-US) function), or submit the form via the submit button.

  <!-- Simple pop-up dialog box, containing a form -->
  <dialog id="favDialog">
    <form method="dialog">
        <p><label for="favAnimal">Favorite animal:</label>
        <select id="favAnimal" name="favAnimal">
          <option>Brine shrimp</option>
          <option>Red panda</option>
          <option>Spider monkey</option>
        <button id="cancel" type="reset">Cancel</button>
        <button type="submit">Confirm</button>

    <button id="updateDetails">Update details</button>

    (function() {
      var updateButton = document.getElementById('updateDetails');
      var cancelButton = document.getElementById('cancel');
      var dialog = document.getElementById('favDialog');
      dialog.returnValue = 'favAnimal';

      function openCheck(dialog) {
        if( {
          console.log('Dialog open');
        } else {
          console.log('Dialog closed');

      // Update button opens a modal dialog
      updateButton.addEventListener('click', function() {

      // Form cancel button closes the dialog box
      cancelButton.addEventListener('click', function() {


Note : You can find this example on GitHub as htmldialogelement-basic (see it live also).


Browser compatibility

BCD tables only load in the browser

See also

  • The HTML element implementing this interface: <dialog>.