如何从 transclude 函数访问 transclusion 槽？

Question

Angular 1.5 介绍 multi-slot transclusion. According to the docs:

the transclude object { slotA: '?myCustomElement' } maps elements to the slotA slot, which can be accessed via the $transclude function

不幸的是，它没有给出任何例子。它给出的唯一示例根本没有提及插槽：

$transclude(function(clone, scope) {
  element.append(clone);
  transcludedContent = clone;
  transclusionScope = scope;
});

有人可以阐明如何使用 $transclude 函数访问每个插槽吗？

Answer 1

我有类似的问题，但阅读 ng-transclude 的源代码有帮助。原来 $transclude 函数还有第三个参数，也就是槽名。

https://github.com/angular/angular.js/blob/master/src/ng/directive/ngTransclude.js#L190

简单示例：

angular.module('app', []);

angular
  .module('app')
  .directive('dir', function () {
    return {
      transclude: {
        a: 'aT',
        b: 'bT'
      },
      link: function (scope, elem, attrs, ctrl, transclude) {
        transclude(function (content) {
          elem.append('<div>a</div>');
          elem.append(content);
        }, null, 'a');
        
        transclude(function (content) {
          elem.append('<div>b</div>');
          elem.append(content);
        }, null, 'b');
      }
    };
  });

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular.js"></script>

<div ng-app="app">
  <dir>
    <a-t>content of a</a-t>
    <b-t>content of b</b-t>
  </dir>
</div>

如何从 transclude 函数访问 transclusion 槽？

How do I access transclusion slots from the transclude function?

angularjs

angularjs-ng-transclude