自定义ngTagsInput& autoComplete指令（AngularJS） [英] Customizing ngTagsInput & autoComplete directives (AngularJS)
问题描述
我是AngularJS的新手，我目前正在开发一个输入字段，它可以同时接受多个标记以及自动完成功能，该功能会将可用标记显示为下拉选项。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< tags-input> 。这非常有效：
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" }
]
但我想用标准HTML < input> 元素，而不是自定义< tags-input> 元素，该元素随指令一起提供，所以有很多帮助并使用< script src =https://code.jquery.com/jquery-3.1.0.jsintegrity =sha256-slogkvB1K3VOkzAI8QITxV3VzpOnkeNVsKvtkYLMjfk =crossorigin =匿名>< / script> 我能够在这里完成：
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:
这是新的索引.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>
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" }
]
您可以注意到，新指令 tagsInputAttr ，它包装< tags-input> 提供相同的功能，可以在< input> 标记内作为属性以及其他属性使用，例如 ng-model ， display-property 等所以我不必使用< tags-input> 元素直接。 问题是< auto-complete> 放在< input> 标签不起作用。
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，我需要改变我的指令，考虑以下因素：
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
我的问题是如何包装< auto -complete> 在同一< input tags-input-attr> 元素内：
My question is how do I wrap the <auto-complete> inside the same <input tags-input-attr> element:
-
作为同一
< input tags-input-attr>元素内的属性
或作为标准HTML元素中的属性，例如< div> 或< span> ，包含在相同的< input tags-input-attr> 元素中。
or as an attribute inside a standard HTML element like <div> or <span>, wrapped inside the same <input tags-input-attr> element.
如果不是以上两种，那么作为最后的手段，将< auto-complete> 标签包装在相同的<输入标签内 - input-attr> 元素
If not the above two, then as last resort, as the <auto-complete> tag wrapped inside the same <input tags-input-attr> element
感谢所有帮助。
在此先感谢。
All help is appreciated. Thanks in advance.
推荐答案
我对previus指令进行了一些更改，现在它接受了所有类型的转换属性到元素指令。
I made some changes on the previus directive and now it accepts all kind of transformation from attribute to element directive.
你还有 elem-as-attr 属性，但现在你必须指定它的值，它将是元素将替换。
You still have the elem-as-attr attribute, but now you have to specify the value of it, that it will be the element that will replace.
示例：
<div elem-as-attr="tags-input"></div>
您的应用程序JavaScript：
Your application JavaScript:
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 $scope.allTags;
};
});
指令代码：
The directive code:
app.directive('elemAsAttr', function($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;
$(tElement).replaceWith(e);
};
}
}
});
HTML代码：
元素方式：
HTML code:
Element way:
<tags-input ng-model="myTags" add-on-paste="true" display-property="tagname" placeholder="Add a Tag" add-from-autocomplete-only="true">
<auto-complete max-results-to-show="10" display-property="tagname" min-length="2" source="loadTags($query)"></auto-complete>
</tags-input>
属性方式：
Attribute way:
<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>
Plunker：
请注意，
tagsInput
不能使用输入元素，因为input元素在HTML中没有结束标记。所以
你将无法在其中加入自动完成元素。
Note that you cannot use the
inputelement for thetagsInputbecause theinputelement does not have the closing tag in HTML. So you will not be able to put theauto-completeelement inside it.
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