How to set a native attribute from AngularJS directive?

Question

I\'d like to write HTML similar to:

test

And ha

Answer 1

<a full-path="img.png">test</a>
<img full-path="img.png">

app.directive('fullPath', function() {
    return {
        link: function(scope, element, attrs) {
            var fullPathUrl = "http://.../";
            if(element[0].tagName === "A") {
                attrs.$set('href',fullPathUrl + attrs.fullPath);
            } else {
                attrs.$set('src',fullPathUrl + attrs.fullPath);
            }
        },
    }
});

I don't know where you are getting fullPathUrl from, so I hardcoded it in the link function.

Answer 2

A custom filter is much more suited for this case than a directive:

<a href="{{'images/img.png' | fullPath}}">test</a>
<img src="{{'images/img.png' | fullPath}}" />

The filter: (Assuming you have a global filters module)

angular.module('filters').filter('fullPath', function(globalVars) {
  return function(url) {
    return globalVars.staticWebsite + "/app/styles/main/" + url + "?build=" + globalVars.buildNumber;
  };
});

Answer 3

I didn't want the directive to care what the attribute name was, so this is what I ended up doing:

<a shared-asset="images/img.png" attr="href">test</a>
<img shared-asset="images/img.png" />

app.directive('sharedAsset', function (globalVars) {
    return {
        restrict: "A",
        scope: {
            attr: "@attr"
        },
        link: function (scope, element, attrs) {
            var fullPath = globalVars.staticWebsite + "/app/styles/main/" + attrs.sharedAsset + "?build=" + globalVars.buildNumber;

            attrs.$set(scope.attr || "src", fullPath);
        }
    };
});

Update: I changed it to default to the "src" attribute since images will be the most common scenario.