javascript - 模拟实际的右键单击，而不仅仅是 mousedown 或 mouseup

Question

我正在使用一个名为 contextmenu 的(确实非常古老的)jQuery 插件来替换某些元素上的右键单击上下文菜单。该插件的来源可以找到here .

将上下文菜单附加到元素，如下所示:

$(".class").contextMenu('menu_template', {
    menuStyle: {

        border: '0px',

    },
    itemStyle: {

    },
    itemHoverStyle: {

    },
    onShowMenu: function(e, menu) {     

    },
    other stuff ....
})

此外，我想手动触发此菜单，并认为最简单的方法是模拟右键单击该元素。

我已经尝试过:

$('.class').triggerHandler('contextmenu');

和

$('.class').trigger({
    type:'mousedown',
    button:2
}).trigger({
    type:'mouseup',
    button:2
});

和

$('.class').trigger({
    type:'mousedown',
    which:3
}).trigger({
    type:'mouseup',
    which:3
});

只是

$('.class').trigger({
    type:'mousedown',
    which:3
})

这些都不起作用。

我确信这与该插件将其自身附加到元素并覆盖上下文菜单的方式有关，但我不是 JavaScript 专家，所以不确定发生了什么。

如何手动触发此菜单出现？

Answer 1

你尝试过这样的事情吗？

$(document).mousedown(function(e) {
    if (e.button == 2) {
        $("span.demo1").trigger("contextmenu");
    }
    return true;
});

片段

$(document).ready(function() {

  $(document).bind("contextmenu", function(e) {
    e.preventDefault();
  });

  $('span.demo1').contextMenu('myMenu1', {

    bindings: {

      'open': function(t) {

        alert('Trigger was ' + t.id + '\nAction was Open');

      },

      'email': function(t) {

        alert('Trigger was ' + t.id + '\nAction was Email');

      },

      'save': function(t) {

        alert('Trigger was ' + t.id + '\nAction was Save');

      },

      'delete': function(t) {

        alert('Trigger was ' + t.id + '\nAction was Delete');

      }

    }
  });
});
$(document).mousedown(function(e) {
  if (e.button == 2) {
    var element = document.getElementById("quickDemo"),
      ev;
    if (document.createEvent) {
      ev = new MouseEvent("contextmenu", {
        screenX: 0,
        screenY: 0,
        clientX: element.offsetLeft,
        clientY: element.offsetTop + element.offsetHeight,
        ctrlKey: false,
        shiftKey: false,
        altKey: false,
        metaKey: false,
        button: 2
      });
      element.dispatchEvent(ev);
    } else {
      ev = document.createEventObject();
      element.fireEvent('contextmenu', ev);
    }
  }
  return true;
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="http://www.trendskitchens.co.nz/jquery/contextmenu/jquery.contextmenu.r2.js"></script>


<div class="contextMenu" id="myMenu1" style="display: none;">

  <ul>

    <li id="open">
      <img src="folder.png">Open</li>

    <li id="email">
      <img src="email.png">Email</li>

    <li id="save">
      <img src="disk.png">Save</li>

    <li id="delete">
      <img src="cross.png">Delete</li>

  </ul>

</div>
<span class="demo1" id="quickDemo" style="float:right;border: 1px solid #888;">

    <b>DEMO</b> right-click me!!

  </span>