Navigating a parameter within an AngularJS directive

I am currently developing a directive that acts as a wrapper for the freebase search widget using jQuery. This is my first attempt at creating a directive and I have encountered some challenges.

Here are the functionalities I am aiming for: 1. The ability to specify a language (using a two-letter code) for displaying search results as an attribute 2. The ability to define a function to be executed when an item is selected, passing relevant data from the selection

I have created a plunkr showcasing the directive here. The second functionality works smoothly, but I am facing difficulties with the language requirement and unsure of the reason behind it.

Passing in the language code works perfectly when done statically (without interpolation):

if(attrs.lang){
     language = attrs.lang;
}

However, I am unable to make it work when trying to pass in the value like this:

attrs.$observe('lang', function(value) {
      if(value === ""){
           language = 'en';
      } else {
          console.log("lang val " + value);
          language = value;
      }
});

Any insights on why this approach is not functioning properly? I would greatly appreciate any advice.

The current state of the directive is as follows:

directive('suggest', function($http) {
    var language; 
    return {
        restrict: 'E',
        template: "<input type='text'>",
        replace:true,
        scope:{
            selectData:'=',
            onSelect:'&'
        },
        link: function(scope, element, attrs) {

            attrs.$observe('lang', function(value) {
                if(value === ""){
                    language = 'en';
                } else {
                    console.log("lang val " + value);
                    language = value;
                }
            });

            if(attrs.lang){
                language = attrs.lang;
            }


            $(element).suggest({

                "lang": language
            })
            .bind("fb-select", function(e, info) { 
                console.log(info);
                scope.onSelect({data:info});
                console.log("language: " + language);
                scope.$apply(function(){
                    console.log("hello apply here");
                    scope.selectData = info;
                });
            });
        }
    };
});

Answer №1

It seems like there might be some confusion in your query, but I believe you are referring to a specific issue. In a Plunker demo, typing 'fr' into the language and then entering something in the suggest box returns results for the 'en' language instead.

This occurs because the suggest plugin was initialized with the default language (en). The function assigned to the $observe method is not triggered immediately, but rather after the directive has been initialized. Therefore, if the language changes, the suggest plugin needs to be re-initialized.

I am not entirely familiar with this plugin, so I cannot provide the exact correct solution. However, one possible fix that seems to work involves adding re-initialization to the $observe listener:

    attrs.$observe('lang', function(value) {
      console.log("Language value: " + value);
        language = value;
        $(element).suggest({lang: language});
    });

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