角度ng-bind-html和指令

Question

Plunker Link

我有一个元素,我想将HTML绑定到它.

<div ng-bind-html="details" upper></div>

这样可行.现在,除此之外,我还有一个绑定到绑定html的指令:

$scope.details = 'Success! <a href="#/details/12" upper>details</a>'

但是upperdiv和锚的指令没有评估.我如何使其工作？

Answer 1

我也遇到了这个问题,在网上搜索了几个小时后,我读了@ Chandermani的评论,这被证明是解决方案.您需要使用此模式调用'compile'指令:

HTML:

<div compile="details"></div>

JS:

.directive('compile', ['$compile', function ($compile) {
    return function(scope, element, attrs) {
        scope.$watch(
            function(scope) {
                // watch the 'compile' expression for changes
                return scope.$eval(attrs.compile);
            },
            function(value) {
                // when the 'compile' expression changes
                // assign it into the current DOM
                element.html(value);

                // compile the new DOM and link it to the current
                // scope.
                // NOTE: we only compile .childNodes so that
                // we don't get into infinite loop compiling ourselves
                $compile(element.contents())(scope);
            }
        );
    };
}])

你可以在这里看到它的工作小提琴

Answer 2

感谢vkammerer的好回答.我建议的一个优化是在编译运行一次后不看.watch表达式中的$ eval可能会影响性能.

    angular.module('vkApp')
  .directive('compile', ['$compile', function ($compile) {
      return function(scope, element, attrs) {
          var ensureCompileRunsOnce = scope.$watch(
            function(scope) {
               // watch the 'compile' expression for changes
              return scope.$eval(attrs.compile);
            },
            function(value) {
              // when the 'compile' expression changes
              // assign it into the current DOM
              element.html(value);

              // compile the new DOM and link it to the current
              // scope.
              // NOTE: we only compile .childNodes so that
              // we don't get into infinite loop compiling ourselves
              $compile(element.contents())(scope);

              // Use un-watch feature to ensure compilation happens only once.
              ensureCompileRunsOnce();
            }
        );
    };
}]);

这是一个分叉和更新的小提琴.

Answer 3

添加此指令angular-bind-html-compile

.directive('bindHtmlCompile', ['$compile', function ($compile) {
  return {
    restrict: 'A',
    link: function (scope, element, attrs) {
      scope.$watch(function () {
        return scope.$eval(attrs.bindHtmlCompile);
      }, function (value) {
        // Incase value is a TrustedValueHolderType, sometimes it
        // needs to be explicitly called into a string in order to
        // get the HTML string.
        element.html(value && value.toString());
        // If scope is provided use it, otherwise use parent scope
        var compileScope = scope;
        if (attrs.bindHtmlScope) {
          compileScope = scope.$eval(attrs.bindHtmlScope);
        }
        $compile(element.contents())(compileScope);
      });
    }
  };
}]);

像这样使用它:

<div bind-html-compile="data.content"></div>

真的很容易:)

Answer 4

不幸的是,我没有足够的声誉来评论.

我无法让这个工作多年.我修改了我的ng-bind-html代码以使用此自定义指令,但我无法删除$scope.html = $sce.trustAsHtml($scope.html)ng-bind-html工作所需的代码.一旦我删除它,编译功能就开始工作了.

Answer 5

对于任何处理已经在$sce.trustAsHtml这里运行的内容的人来说,我必须采取不同的方式

function(scope, element, attrs) {
    var ensureCompileRunsOnce = scope.$watch(function(scope) {
            return $sce.parseAsHtml(attrs.compile)(scope);
        },
        function(value) {
            // when the parsed expression changes assign it into the current DOM
            element.html(value);

            // compile the new DOM and link it to the current scope.
            $compile(element.contents())(scope);

            // Use un-watch feature to ensure compilation happens only once.
            ensureCompileRunsOnce();
        });
}

这只是link指令的一部分,因为我使用的是不同的布局.您还需要注入$sce服务$compile.