使用 ng-click 自动传递 $event?

问题描述

我知道如果我像这样传入 $event 对象，我可以从 ng-click 访问点击事件:

I know that I can get access to the click event from ng-click if I pass in the $event object like so:

<button ng-click="myFunction($event)">Give me the $event</button>

<script>
  function myFunction (event) {
    typeof event !== "undefined" // true
  }
</script>

每次都必须显式传递 $event 有点烦人.是否可以设置 ng-click 默认以某种方式将其传递给函数?

It's a little bit annoying having to pass $event explicitly every time. Is it possible to set ng-click to somehow pass it to the function by default?

推荐答案

看一看 ng-click 指令来源:

...
compile: function($element, attr) {
  var fn = $parse(attr[directiveName]);
  return function(scope, element, attr) {
    element.on(lowercase(name), function(event) {
      scope.$apply(function() {
        fn(scope, {$event:event});
      });
    });
  };
}

它展示了event 对象正在传递到 ng-click 表达式，使用 $event 作为参数名称.这是由 $parse 服务完成的，它不允许参数渗入目标范围，这意味着答案是否定的，您无法访问$event 对象的任何其他方式，但通过回调参数.

It shows how the event object is being passed on to the ng-click expression, using $event as a name of the parameter. This is done by the $parse service, which doesn't allow for the parameters to bleed into the target scope, which means the answer is no, you can't access the $event object any other way but through the callback parameter.

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