Customizing ngTagsInput amp; autoComplete directives (AngularJS)(自定义 ngTagsInput amp;自动完成指令(AngularJS))

问题描述

我是 AngularJS 的新手，目前正在处理一个输入字段，它可以一次接受多个标签以及自动完成功能，它将可用标签显示为下拉选项.为此，我使用了我在网上找到的 ngTagsInput 指令(http://mbenford.github.io/ngTagsInput/)，它为我提供了一个自定义 HTML 元素 .这很好用:

I am new to AngularJS and am currently working on an input field, which can accept multiple tags at a time along with the auto-complete feature, which display the available tags as dropdown options. For this I am using the ngTagsInput directive I found on the web(http://mbenford.github.io/ngTagsInput/), which gives me a custom HTML element <tags-input>. This works beautifully:

index.html:

<script>
var app = angular.module('plunker', ['ngTagsInput']);

app.controller('MainCtrl', function($scope, $http) {
  $scope.tags = [
    { text: 'Tag1' },
    { text: 'Tag2' },
    { text: 'Tag3' }
  ];

  $scope.loadTags = function(query) {
    return $http.get('tags.json');
  };
});
</script>
<div ng-app="plunker" ng-controller="MainCtrl">    
    <tags-input ng-model="tags" add-on-paste="true" display-property="text" placeholder="Add a Tag" add-from-autocomplete-only="true">
           <auto-complete max-results-to-show="4" min-length="2" source="loadTags($query)"></auto-complete>
    </tags-input>
</div>

tags.json:

[
  { "text": "Tag1" },
  { "text": "Tag2" },
  { "text": "Tag3" },
  { "text": "Tag4" },
  { "text": "Tag5" },
  { "text": "Tag6" },
  { "text": "Tag7" },
  { "text": "Tag8" },
  { "text": "Tag9" },
  { "text": "Tag10" }
]

但是我想使用标准的 HTML <input> 元素，而不是指令附带的自定义 <tags-input> 元素，所以使用很多帮助和使用 <script src="https://code.jquery.com/jquery-3.1.0.js" integrity="sha256-slogkvB1K3VOkzAI8QITxV3VzpOnkeNVsKvtkYLMjfk="crossorigin="anonymous"></script> 我可以在这里做到:

However I wanted to use the standard HTML <input> element instead of the custom <tags-input> element which comes along with the directive, so with a lot of help and using <script src="https://code.jquery.com/jquery-3.1.0.js" integrity="sha256-slogkvB1K3VOkzAI8QITxV3VzpOnkeNVsKvtkYLMjfk=" crossorigin="anonymous"></script> I was able to do it here:

这是新的index.html:

<script>
var app = angular.module('plunker', ['ngTagsInput']);

app.controller('MainCtrl', function($scope, $http) {
  $scope.tags = [
    { "id":1, "tagname": 'Tag1' },
    { "id":2, "tagname": 'Tag2' },
    { "id":3, "tagname": 'Tag3' },
    { "id":4, "tagname": 'Tag4' }
  ];

    $scope.loadTags = function(query) {
    return $http.get('tags.json');
  };

});

app.directive('tagsInputAttr', 
  function($compile){
    return {
      restrict: 'A',
      require: '?ngModel',
      scope:{
        ngModel: '='
      },
      link: function($scope, element, attrs, controller) {
        var attrsText = '';
        $.each($(element)[0].attributes, function(idx, attr) {
          if (attr.nodeName === "tags-input-attr" || attr.nodeName === "ng-model") 
            return;

          attrsText += " " + attr.nodeName + "='" + attr.nodeValue + "'";
        });

        var html ='<tags-input ng-model="ngModel" ' + attrsText + '></tags-input>';
        e =$compile(html)($scope);
        $(element).replaceWith(e);
      }
    };
  }
);
</script>
<div ng-app="plunker" ng-controller="MainCtrl">

    <input tags-input-attr ng-model="tags" add-on-paste="true" display-property="tagname" placeholder="Add tags here..." add-from-autocomplete-only="true">
      <auto-complete max-results-to-show="3" min-length="2" source="loadTags($query)"></auto-complete>
    </input>

  </div>

还有新的tags.json:

[
  { "id":1, "tagname": "Tag1" },
  { "id":2, "tagname": "Tag2" },
  { "id":3, "tagname": "Tag3" },
  { "id":4, "tagname": "Tag4" },
  { "id":5, "tagname": "Tag5" },
  { "id":6, "tagname": "Tag6" },
  { "id":7, "tagname": "Tag7" },
  { "id":8, "tagname": "Tag8" },
  { "id":9, "tagname": "Tag9" },
  { "id":10, "tagname": "Tag10" }
]

如您所见，新指令 tagsInputAttr 包装了 提供了相同的功能，并且可以在 中使用.input> 标记作为一个属性以及其他属性，例如 ng-model、display-property 等.所以我不必使用 元素直接.问题是 <auto-complete> 放置在 <input> 标记内不起作用.

As you can notice,the new directive tagsInputAttr, which wraps the <tags-input> provides the same functionality and can be used inside <input> tag as an attribute along with the rest of attributes such as ng-model, display-property etc. So I don't have to use the <tags-input> element directly. The problem is that the <auto-complete> placed inside the <input> tag doesn't work.

为此，我需要修改我的指令，考虑以下几点:

For this I need to alter my directive, considering the following:

注意:我不想为此使用 jquery

Note: I do not want to use jquery for this

我的问题是如何将 <auto-complete> 包装在同一个 <input tags-input-attr> 元素中:

My question is how do I wrap the <auto-complete> inside the same <input tags-input-attr> element:

1. 作为同一<input tags-input-attr>元素内的属性

或作为标准 HTML 元素内的属性，如 <div> 或 ，包裹在相同的 元素.

<div elem-as-attr="tags-input"></div>

var app = angular.module('plunker', ['ngTagsInput']);

app.controller('MainCtrl', function($scope, $http) {
  $scope.allTags = [
    { "id":1, "tagname": "Tag1" },
    { "id":2, "tagname": "Tag2" },
    { "id":3, "tagname": "Tag3" },
    { "id":4, "tagname": "Tag4" },
    { "id":5, "tagname": "Tag5" },
    { "id":6, "tagname": "Tag6" },
    { "id":7, "tagname": "Tag7" },
    { "id":8, "tagname": "Tag8" },
    { "id":9, "tagname": "Tag9" },
    { "id":10, "tagname": "Tag10" }
  ];

  $scope.myTags =[
    $scope.allTags[2],
    $scope.allTags[4],
    $scope.allTags[8]
  ];

  $scope.loadTags = function(query) {
    return $scope.allTags;
  };
});

app.directive('elemAsAttr', function($compile) {
  return {
    restrict: 'A',
    require: '?ngModel',
    replace: true,
    scope: true,
    compile: function(tElement, tAttrs) {
      return function($scope) {
        var attrs = tElement[0].attributes;

        var attrsText = '';
        for (var i=0; i < attrs.length; i++) {
          var attr = attrs.item(i);
          if (attr.nodeName === "elem-as-attr") {
            continue;
          }
          attrsText += " " + attr.nodeName + "='" + attr.nodeValue + "'";        
        }

        var hasModel = $(tElement)[0].hasAttribute("ng-model");
        var innerHtml = $(tElement)[0].innerHTML;
        var html = '<' + tAttrs.elemAsAttr  + attrsText + '>' + innerHtml + '</' + tAttrs.elemAsAttr + '>';

        var e = hasModel ? $compile(html)($scope) : html;
        $(tElement).replaceWith(e);
      };
    }
  }
});

  <tags-input ng-model="myTags" add-on-paste="true" display-property="tagname" placeholder="Add a Tag" add-from-autocomplete-only="true">
    <auto-complete max-results-to-show="10" display-property="tagname" min-length="2" source="loadTags($query)"></auto-complete>
  </tags-input>

  <div elem-as-attr="tags-input" ng-model="myTags" add-on-paste="true" display-property="tagname" placeholder="Add tags here..." add-from-autocomplete-only="true">
    <div elem-as-attr="auto-complete" max-results-to-show="10" display-property="tagname" min-length="2" source="loadTags($query)"></div>
  </div>