我想在angularjs中创建一个元素指令,它从作为属性传递的json blob生成一个html元素。我尝试过以下几种变体......
demoApp.directive("element", function() {
return {
restrict: "E",
scope: {
attributes: "@",
name: "@"
},
template:
function(name, attributes) {
var templateString = "<" + attributes.tag;
for (attribute in attributes) {
if (attribute != "name_displayed" && attribute != "tag") {
templateString += " " + attribute + "=\"" attributes[attribute] + "\"";
}
}
templateString += " name=\"" field + "\"";
templateString += ">";
templateString += "</" + attributes.tag + ">";
return attributes.name_displayed + ": " + templateString;
}(name, attributes)
};
});
html看起来像
<div ng-repeat="(name, attributes) in fields">
<element name="{[{name}]}" attributes="{[{attributes}]}"></element>
</div>
json对象的属性如何
{"name_displayed":"Agency","size":"30","tag":"input","type":"text"}
名字看起来像
agency
看起来我不能使用函数作为模板,看起来我也无法访问属性或名称对象。
答案 0 :(得分:0)
您可以在link
函数中实现逻辑,而不是template
。试试这个:
<强> HTML 强>
<element ng-repeat="field in fields" />
<强>的JavaScript 强>
angular.module('demo', []).
controller('demoCtrl', ['$scope', function($scope) {
$scope.fields = [{
"tag": "input",
"type": "text",
"value": "Demo app",
"name": "my_input",
"label": "My Text"
}, {
"tag": "input",
"type": "checkbox",
"checked": "checked",
"name": "my_checkbox",
"label": "My Checkbox"
}, {
"tag": "input",
"type": "button",
"value": "Click Me",
"name": "my_button"
}];
}]).
directive('element', function() {
return {
restrict: "E",
replace: true,
template: "<div></div>",
link: function(scope, element, attrs) {
var label,
el,
key,
field;
field = scope.field;
if('label' in field) {
label = document.createElement('label');
label.innerHTML = field.label;
element.append(label);
element.append(document.createTextNode(': '));
}
el = document.createElement(field.tag);
for(key in field) {
if(field.hasOwnProperty(key) && // avoid prototype properties
key !== 'tag' && // avoid tag
key !== 'label' && // avoid label
key[0] !== '$' // avoid angular staff derived from scope
) {
el.setAttribute(key, field[key]);
}
}
element.append(el);
}
};
});
以下是一个工作示例:http://plnkr.co/edit/B1RigXrzA2l1kIVNVXGw?p=preview
答案 1 :(得分:0)
检查出来:http://jsfiddle.net/es4Y6/1/
var app = angular.module('hmm', []);
function ctrl($scope) {
$scope.fields = {
first: '{"name_displayed": "Agency", "size": "30", "tag": "input", "type": "text"}',
second: '{"name_displayed": "Foo", "size": "30", "tag": "input", "type": "password"}',
third: '{"name_displayed": "Bar", "size": "30", "tag": "input", "type": "number"}'
};
}
app.directive('blah', function() {
var template = function(name, attributes) {
var templateString = "<" + attributes.tag;
for (var attribute in attributes) {
if (attribute != "name_displayed" && attribute != "tag") {
templateString += " " + attribute + '="' + attributes[attribute] + '"';
}
}
templateString += ' name="' + name + '"';
templateString += ">";
templateString += "</" + attributes.tag + ">";
return attributes.name_displayed + ": " + templateString;
};
return {
restrict: "E",
link: function(scope, element, attrs){
var attributes = angular.fromJson(attrs.attributes);
var tpl = template(attrs.name, attributes);
element.html(tpl);
}
};
});
我认为“json blob”是指json字符串。如果没有,那么你的意思是JS对象。在这种情况下,请更新$scope.fields
并删除angular.fromJson()
。
<div ng-app="hmm">
<div ng-controller="ctrl">
<div ng-repeat="(name, attributes) in fields">
<blah name="{{name}}" attributes="{{attributes}}"></blah>
</div>
</div>
</div>
它有效,但对于你要解决的问题来说,这是一个非常糟糕的方法。