AT_ AT_ - 5 months ago 67
AngularJS Question

angularjs expression in html <object> tag

I have a scope like

$scope.doc_details
in my angularjs controller, and I want to use it to display a pdf file by using a tag, like this:

<object data="{{doc_details.file_url}}" type="application/pdf"></object>


but it doesn't get loaded in the browser, in my chrome console, all I see is:

Failed to load resource: the server responded with a status of 404 (Not Found)
http://localhost/%7B%7Bdoc_details.file_url%7D%7D


and when I just display it using
<span>{{doc_details.file_url}}</span>
it show the value.

Answer

The problem here is that the browser is seeing

<object data="{{doc_details.file_url}}" type="application/pdf"></object>

in the DOM before Angular compiles it, and obviously {{doc_details.file_url}} isn't a valid URL.

Directives can be your friend here.

Say we want to write:

<pdf src='doc_details.file_url'></pdf>

We can create a very simple directive:

app.directive('pdf', function() {
    return {
        restrict: 'E',
        link: function(scope, element, attrs) {
            var url = scope.$eval(attrs.src);
            element.replaceWith('<object type="application/pdf" data="' + url + '"></object>');
        }
    };
});

This will defer the creation of the object element until we actually have the URL available to us from the scope (assuming it's already there - otherwise you'd want to $watch the src attribute on the scope until it became available).

Here this is in a fiddle.