Angular中的动态标签生成 [英] Dynamic Tag Generation in Angular

问题描述

我正在尝试使用包含一堆指令名称的数组动态生成表单

I am trying to dynamically generate a form using an array that contains a bunch of directive names

$scope.components = ["textbox", "textbox", "radio", "checkbox", "label"];

我想使用angular来生成具有这些名称的标签.例如

I want to generate tags with these names using angular. For example

<textbox></textbox>
<textbox></textbox>
<radio></radio>
<checkbox></checkbox>
<label></label>

<--THE FOLLOWING DOESN'T WORK BUT WOULD BE COOL IF IT DID-->
<{{component}} ng-repeat="component in components track by $index"></{{component}}> 

现在我可以替代

<div ng-include="component + '.html'" ng-repeat="component in components track by $index"></div>

基本上，该指令将执行templateUrl参数所执行的操作.我应该

Which basically does what the directive would do with the templateUrl parameter. Should I

• 制定一个生成标签的指令
• 按原样继续使用ng-include
• 使用其他方法

推荐答案

您不能仅使用角度表达式来动态生成元素标签.但是，您可以创建一个自定义directive来为您完成此工作.

You can't generate tag of elements dynamically using only angular expressions. However you can create a custom directive to do that work for you.

概念证明:((演示:检查DOM树以查看生成的元素)

Proof of concept: (Demo: inspect DOM tree to see generated elements)

angular.module('MyModule').directive('dynamicTag', function($compile) {
  return {
    restrict: 'E',
    scope: {
      components: '&components'
    },
    link: function($scope, $element) {
      var components = angular.isFunction($scope.components) ? $scope.components() : [];
      var domElements = [];
      angular.forEach(components, function(c) {
        var domElement = document.createElement(c);
        $compile(domElement)($scope);
        domElements.push(domElement);
      });
      $element.replaceWith(domElements);
    }
  };
});

HTML

<dynamic-tag components="components"></dynamic-tag>

components在您的问题中是作用域中的字符串数组:

being components an array of strings in the scope as in your question:

$scope.components = ['textbox', 'radio', 'checkbox', 'label'];

这篇关于Angular中的动态标签生成的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！