AngularJS:如何在编译之前获取 ng-repeat 指令模板? [英] AngularJS : How to get ng-repeat directive template before it gets compiled?

问题描述

我正在尝试获取在我的自定义指令中使用的 ng-repeat 指令的初始 html 模板，该指令包含嵌套的内容.但是，在指令中设置的实际 html 文本，我要么已经编译过 ng-repeat 指令，要么只是一个如下所示的注释:

我已经在 github 上问过这个问题，但不幸的是答案是'对我来说很清楚.有没有办法在编译之前获取 ng-repeat 指令模板?

这是我想要实现的一个简单示例(以及 plnkr):

app.directive('parent', function() {返回 {限制:'E'，模板:'<div ng-transclude></div>',转置:真实，优先级:1001，范围:真实，编译:函数(元素，属性){console.log(element.html());控制台日志(元素)；}};});

<div ng-repeat="项目中的项目">{{物品}}

</父母>

解决方案

ng-repeat 指令有 `transclude: "element"，所以编译的时候会把整个元素取出来DOM(准备嵌入)并留下评论.

因此，第一个 console.log(element.html()) 不会看到任何东西，因为您自己的指令的嵌入还没有发生.

但即使你在链接时检查内部 HTML，ngRepeat 也将被编译，但它的嵌入还不会发生；它发生在稍后，当 ngRepeat 的 scope.$watchCollection 触发时.

所以，看到内容的唯一方法就是抢占ngRepeat的编译.您可以使 parent 指令 terminal: true，检查内容并手动重新编译.

您还可以添加一个指令，该指令在优先级高于 ngRepeat 的可重复元素上运行并获取内容.

(您甚至可以重复使用 "ngRepeat" 名称)

app.directive("ngRepeat", function(){返回 {require: "?^parent",//可选地要求你的父母优先级:1010，编译:函数(tElem){var 模板 = tElem.html();返回函数链接(范围，元素，属性，ctrls){var parentCtrl = ctrls;如果 (!parentCtrl) 返回；//把它交给父控制器parentCtrl.setTemplate(模板);}}}})

演示

I'm trying to get the initial html template for the ng-repeat directive that is used inside my custom directive which trancludes nested content. But instead the actual html text that was set inside the directive I get either already compiled ng-repeat directive or simply a comment that looks like the following:

<!-- ngRepeat: item in items -->

I already asked that question at github, but unfortunately the answer wasn't very clear for me. Is there a way to get ng-repeat directive template before it gets compiled?

Here's a simple example of what I am trying to achieve (and a plnkr):

app.directive('parent', function() {
  return {
    restrict:'E',
    template:'<div ng-transclude></div>',
    transclude: true,
    priority: 1001,
    scope: true,
    compile: function(element, attrs) {
      console.log(element.html());
      console.log(element);
    }
  };
});

<parent>
  <div ng-repeat="item in items">
    {{item}}
  </div>
</parent>

解决方案

ng-repeat directive has `transclude: "element", and so, when it is compiled, the entire element is taken out of DOM (in preparation for transclusion) and a comment is left.

So, the first console.log(element.html()) won't see anything, since the transclusion of your own directive hasn't happened.

But even if you examine the inner HTML at link-time, the ngRepeat will have been compiled, but its transclusion would not yet happen; it happens later, when scope.$watchCollection of ngRepeat fires.

So, the only way to see the content is to preempt the compilation of ngRepeat. You can either make your parent directive terminal: true, examine the contents and manually re-compile.

You can also add a directive that runs on a repeatable element with higher priority than ngRepeat and get the contents.

(You could even reuse the "ngRepeat" name)

app.directive("ngRepeat", function(){
  return {
    require: "?^parent", // optionally require your parent
    priority: 1010,
    compile: function(tElem){
      var template = tElem.html();
      return function link(scope, element, attrs, ctrls){
         var parentCtrl = ctrls;

         if (!parentCtrl) return;

         // hand it off to the parent controller
         parentCtrl.setTemplate(template);
      }
    }
  }
})

Demo

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