Bug in Iframe directive with Angular: issue with the src attribute

Question

Bug in Iframe directive with Angular: issue with the src attribute

Encountering an issue with implementing an Iframe directive.

Status: Template:

<div class="externalIframe" iframe-src="external.html"></div>

Directive :

angular.module('project.directives', [])
   .directive('externalIframe', ['$rootScope', function($rootScope) {
      return {
        restrict: 'C',
        replace: true,
        transclude: true,
        scope: {
          src: '@iframeSrc', // utilizing data-binding from parent scope
        },
        template: '<iframe src="{{src}}" height="100%" width="100%" frameborder="0"></iframe>',
        link: function(scope, elem, attrs) {
          //elem.src = "dummy.html"; // not working either
        }
      }
    }])

Issue: Triggering 2 HTTP requests (2 iframe loading).

one to
```
http://localhost:8000/app/{{src}}
```
(iframe src not yet interpreted by angular)
one to
```
http://localhost:8000/app/external.html
```
(iframe src once interpreted by angular)

Looking to avoid the unnecessary first call. Any suggestions?

Attempted setting src programmatically in link or compile function with no luck in loading the iframe.

edit: jsFiddle added for bug demo with compile method => two requests are observed in network tab of firebug/chrome dev panel:

http://fiddle.jshell.net/_display/%7B%7Bsrc%7D%7D

http://fiddle.jshell.net/_display/external.html

Appreciate any assistance.

javascript angularjs iframe angularjs-directive

Answer 1

Answer №1

No directive is necessary in this case. Simply utilize ng-src on a real iframe element. Refer to the documentation for ng-src.

<iframe ng-src="external.html"></iframe>

Answer 2

No directive is necessary in this case. Simply utilize ng-src on a real iframe element. Refer to the documentation for ng-src.

<iframe ng-src="external.html"></iframe>

Answer 3

Answer №2

By removing src from the iframe in the template and instead modifying the attribute in the link function using element.attr(), we can achieve the desired result:

return {
    restrict: 'E',
    require: '?ngModel',
    replace: true,
    transclude: true,
    template: '<iframe height="100%" width="100%" frameborder="0"></iframe>',
    link: function (scope, element, attrs) {
        element.attr('src', attrs.iframeSrc);
    }
};

Check out the Fiddle here: http://jsfiddle.net/5rYrw/

Answer 4

By removing src from the iframe in the template and instead modifying the attribute in the link function using element.attr(), we can achieve the desired result:

return {
    restrict: 'E',
    require: '?ngModel',
    replace: true,
    transclude: true,
    template: '<iframe height="100%" width="100%" frameborder="0"></iframe>',
    link: function (scope, element, attrs) {
        element.attr('src', attrs.iframeSrc);
    }
};

Check out the Fiddle here: http://jsfiddle.net/5rYrw/

Answer 5

Answer №3

Instead of simply using 'link' in your code, consider utilizing the 'compile' function to modify the HTML before it is inserted into the DOM. This way, you can make changes to the source attribute directly rather than relying on the binding process.

Here's a breakdown of how things work with link: 1. First, compile is called with {{url}}, triggering an iframe request. 2. Then, link is called, replacing {{url}} with the actual URL, leading to a second call.

By opting for 'compile', you gain more control over modifying the src attribute yourself.

For further insights, take a look at http://docs.angularjs.org/guide/directive

Edit Feel free to explore this fiddle as well: http://jsfiddle.net/jbSx6/20/

return {
    restrict: 'E',
    require: '?ngModel',
    replace: true,
    transclude: true,
    template: '<iframe src="%url%" height="100%" width="100%" frameborder="0"></iframe>',
    compile: function (element, attrs, transclude) {
        console.log(element[0].outerHTML);
        element[0].outerHTML = element[0].outerHTML.replace('%url%',attrs.iframeSrc);
        console.log(element);
    }
};

<div ng-app="myApp">
   <div>display google in frame</div>
   <my-frame data-iframe-src="http://jsfiddle.net">test</my-frame>
</div>

Answer 6

Instead of simply using 'link' in your code, consider utilizing the 'compile' function to modify the HTML before it is inserted into the DOM. This way, you can make changes to the source attribute directly rather than relying on the binding process.

Here's a breakdown of how things work with link: 1. First, compile is called with {{url}}, triggering an iframe request. 2. Then, link is called, replacing {{url}} with the actual URL, leading to a second call.

By opting for 'compile', you gain more control over modifying the src attribute yourself.

For further insights, take a look at http://docs.angularjs.org/guide/directive

Edit Feel free to explore this fiddle as well: http://jsfiddle.net/jbSx6/20/

return {
    restrict: 'E',
    require: '?ngModel',
    replace: true,
    transclude: true,
    template: '<iframe src="%url%" height="100%" width="100%" frameborder="0"></iframe>',
    compile: function (element, attrs, transclude) {
        console.log(element[0].outerHTML);
        element[0].outerHTML = element[0].outerHTML.replace('%url%',attrs.iframeSrc);
        console.log(element);
    }
};

<div ng-app="myApp">
   <div>display google in frame</div>
   <my-frame data-iframe-src="http://jsfiddle.net">test</my-frame>
</div>

Bug in Iframe directive with Angular: issue with the src attribute

Answer №1

Answer №2

Answer №3

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