我怎样才能在浏览器窗口的任意位置单击时设置一个变量？ [英] How can I set a variable when clicking anywhere in the browser window?

问题描述

我有一个由控制NG-节目我的网站上下拉菜单。当用户点击一个按钮，他们看到的下拉列表。当他们再次点击，下拉是隐藏的：

I have a dropdown menu on my site that is controlled by ng-show. When the user clicks on a button they see the dropdown. When they click again, the dropdown is hidden:

<div class="button" ng-click="show = !show">Click Me</div>
<div ng-show="show" ng-init="show = false">
    <div>You can see me now!</div>
</div>

这工作正常。但是，我要的是显示如果用户点击任何地方，是不是带班的按钮的DIV窗口设置为false。我怎样才能做到这一点？

This works fine. But, what I want is for show to be set to false if the user clicks anywhere in the window that is not the div with class "button". How can I achieve this?

推荐答案

HTML

<div customDropdown>
  <h4>Click here to see dropdown</h4>
  <ul ng-show="dropdownVisible">
    <li ng-click="doSomething()">Item #1</li>
    <li ng-click="doSomething()">Item #2</li>
    <li ng-click="doSomething()">Item #3</li>
  </ul>
</div>

简单的指令：

app.directive('customDropdown', ['$document', function($document) {
  return {
    restrict: 'A',
    link: function(scope, el) {

      // Switch dropdown visibility by clicking on 'target' element
      el.on('click', function(event) {
        event.preventDefault();
        scope.dropdownVisible = !scope.dropdownVisible;
      });

      // Hide dropdown if clicked somewhere 'outside'
      $document.on('click', function(event) {
        scope.dropdownVisible = false;
        return $document.off('click', event);
      });

    }
  };
}]);

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