AngularJS脚本标记JSON-LD

Question

如何application/ld+json script在AngularJS中使用动态构建的JSON对象创建标记.

这就是我需要脚本标签的样子

<script type="application/ld+json">
{
  "@context": "http://schema.org",
  "@type": "Place",
  "geo": {
    "@type": "GeoCoordinates",
    "latitude": "40.75",
    "longitude": "73.98"
  },
  "name": "Empire State Building"
}
</script>

我尝试了以下代码,但我无法让它工作:

HTML

<div ng-controller="TestController">
  <script type="application/ld+json">
    {{jsonId|json}}
  </script>
  {{jsonId|json}}
</div>

调节器

var myApp = angular.module('application', []);

myApp.controller('TestController', ['$scope', function($scope) {
  $scope.jsonId = {
    "@context": "http://schema.org",
    "@type": "Place",
    "geo": {
      "@type": "GeoCoordinates",
      "latitude": "40.75",
      "longitude": "73.98"
    },
    "name": "Empire State Building"
  };
}]);

脚本标记内的表达式不会执行.脚本标记外部的表达式正确执行并显示JSON

请看jsfiddle

Answer 1

喝完一杯咖啡后,我记得有$sce一项trustAsHtml功能服务.

我创建了一个接受json参数的指令,以便于重复使用

请参阅以下更新和工作代码:

HTML

<div ng-controller="TestController">
  <jsonld data-json="jsonId"></jsonld>
</div>

使用Javascript

var myApp = angular.module('application', []);

myApp.controller('TestController', ['$scope', function($scope) {
  $scope.jsonId = {
    "@context": "http://schema.org",
    "@type": "Place",
    "geo": {
      "@type": "GeoCoordinates",
      "latitude": "40.75",
      "longitude": "73.98"
    },
    "name": "Empire State Building"
  };
}]).directive('jsonld', ['$filter', '$sce', function($filter, $sce) {
  return {
    restrict: 'E',
    template: function() {
      return '<script type="application/ld+json" ng-bind-html="onGetJson()"></script>';
    },
    scope: {
      json: '=json'
    },
    link: function(scope, element, attrs) {
      scope.onGetJson = function() {
        return $sce.trustAsHtml($filter('json')(scope.json));
      }
    },
    replace: true
  };
}]);

这是脚本输出的图像

请参阅更新的jsfiddle