Jan*_*Jan 45 javascript angularjs
我想在内容更改时创建一个包含自定义行为的列表.我尝试为此创建一个指令但是我对如何将ng-transclude与ng-repeat指令结合起来感到有点迷茫.有人能让我走上正轨吗？
HTML:
<div ng-app="myApp">
<div ng-controller="ctrl">
<mylist items="myItem in items">
<span class="etc">{{myItem}}</span>
</mylist>
</div>
</div>
使用Javascript:
angular.module('myApp', [])
.controller('ctrl', function ($scope) {
$scope.items = ['one', 'two', 'three'];
})
.directive('mylist', function () {
return {
restrict:'E',
transclude: 'element',
replace: true,
scope: true,
template: [
'<ul>',
'<li ng-repeat="WhatGoesHere in items" ng-transclude></li>',
'</ul>'
].join(''),
link: function (scope, element, attr) {
var parts = attr.items.split(' in ');
var itemPart = parts[0];
var itemsPart = parts[1];
scope.$watch(itemsPart, function (value) {
scope.items = value;
});
}
}
});
我有一部分工作在这里
标准:
element[0].querySelectorAll('ul>li')或者某些东西,它只需要在Chrome上运行).Jan*_*Jan 20
自己解决了这个问题:
我可以在编译步骤(jsfiddle)中通过在编译ng-repeat模板时添加属性并将其提供给我的属性的内容来完成.
<div ng-app="myApp">
<div ng-controller="ctrl">
<mylist element="myItem in items">{{myItem}}</mylist>
</div>
</div>
var myApp = angular.module('myApp', [])
.controller('ctrl', function ($scope) {
$scope.items = ['one', 'two', 'three'];
})
.directive('mylist', function ($parse) {
return {
restrict:'E',
transclude: 'element',
replace: true,
scope: true,
template: [
'<ul>',
'<li ng-transclude></li>',
'</ul>'
].join(''),
compile: function (tElement, tAttrs, transclude) {
var rpt = document.createAttribute('ng-repeat');
rpt.nodeValue = tAttrs.element;
tElement[0].children[0].attributes.setNamedItem(rpt);
return function (scope, element, attr) {
var rhs = attr.element.split(' in ')[1];
scope.items = $parse(rhs)(scope);
console.log(scope.items);
}
}
}
});
Izh*_*aki 14
实现此目的的另一种方法如下.
index.html的:
<html ng-app='myApp'>
<head>
<title>AngularJS Transclude within Repeat Within Directive</title>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.18/angular.min.js"></script>
<script src='index.js'></script>
</head>
<body ng-controller='myController'>
<people>Hello {{person.name}}</people>
<button name="button" ng-click="changeRob()">Change Rob</button>
</body>
</html>
index.js:
var myApp = angular.module( 'myApp', [] );
myApp.controller( 'myController', function( $scope ) {
$scope.people = [
{ name: 'Rob' },
{ name: 'Alex' },
{ name: 'John' }
];
$scope.changeRob = function() {
$scope.people[0].name = 'Lowe';
}
});
myApp.directive( 'people', function() {
return {
restrict: 'E',
transclude: true,
template: '<div ng-repeat="person in people" transcope></div>',
}
});
myApp.directive( 'transcope', function() {
return {
link: function( $scope, $element, $attrs, controller, $transclude ) {
if ( !$transclude ) {
throw minErr( 'ngTransclude' )( 'orphan',
'Illegal use of ngTransclude directive in the template! ' +
'No parent directive that requires a transclusion found. ' +
'Element: {0}',
startingTag( $element ));
}
var innerScope = $scope.$new();
$transclude( innerScope, function( clone ) {
$element.empty();
$element.append( clone );
$element.on( '$destroy', function() {
innerScope.$destroy();
});
});
}
};
});
在这个类似的plunker中看到它的实际效果.基于这个长期的Github问题讨论.
不幸的是,其他答案不适用于最新版本的角度(我检查过1.4)所以我认为分享这个jsbin有一个好处我发现:
var app = angular.module('app', [])
.controller('TestCtrl', function($scope) {
$scope.myRecords = ['foo', 'bar', 'baz'];
});
app.directive('myDirective', function($compile) {
var template = '<div id="inner-transclude" ng-repeat="record in records"></div>';
return {
scope: {
records: '='
},
restrict: 'A',
compile: function(ele) {
var transclude = ele.html();
ele.html('');
return function(scope, elem) {
var tpl = angular.element(template);
tpl.append(transclude);
$compile(tpl)(scope);
elem.append(tpl);
};
}
};
});<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.0/angular.js"></script>
<div ng-app="app" ng-controller="TestCtrl">
<div my-directive records="myRecords">
?: {{record}}
</div>
</div>Transcluding不是必需的,因为它items包含了渲染模板所需的内容.换句话说,元素内部没有任何东西 - 即 <mylist>nothing new here we need to transclude</mylist>.似乎Angular也会为我们收看.
.directive('mylist', function () {
return {
restrict:'E',
replace: true,
scope: true,
template: [
'<ul>',
'<li ng-repeat="myItem in items">{{myItem}}</li>',
'</ul>'
].join('')
}
});
HTML:
<mylist></mylist>
小提琴.
请注意,创建新范围是可选的,因此您可以注释掉这一行:
//scope: true,
更新:您可以选择创建隔离范围:
scope: { items: '='},
HTML:
<mylist items=items></mylist>
小提琴.
Update2:根据Jan提供的其他信息:
必须在视图中定义项的模板...我想重用ng-repeat指令中的逻辑
好吧,让我们把它全部放在视图中,并使用ng-repeat:
<ul mylist>
<li ng-repeat="myItem in items">
<span class="etc">{{myItem}}</span>
</li>
</ul>
它[指令]必须能够访问子作用域中的item属性...该指令必须能够访问该列表,以便我可以设置适当的监视和更改内容
继原来的小提琴,我们将使用一个正常的孩子范围(即子范围将prototypically从父范围继承)scope: true,.这将确保指令可以访问控制器范围上定义的属性,例如items.
访问生成的DOM项目
指令的link函数有一个element参数.所以在上面的HTML中,元素将被设置为<ul>元素.所以我们可以访问所有DOM元素.例如,element.find('li')或element.children().在下面引用的小提琴中,我有$观看items数组.$ watch回调可以访问element,因此您可以访问生成的DOM项.回调记录element.children()到控制台.
小提琴.
总而言之,要将自定义行为添加到列表中,只需将指令放到ul或ol上即可.