Basic FB Share link example that allows custom image url and description for dynamic content. This content would be available in the JS somewhere... like the context.

FBShareExample

    Core.prototype._initializeFbShare = function() {
        $('#Fb-share').on('click', _(this._handleFbShare).bind(this));
    };

    Core.prototype._handleFbShare = function(event) {
        event.preventDefault();

        var image_url = this.getPaletteImageUrl(this.picker.config.shade_array);
        var palette_name = this.$inputPalName.val();
        var lang = document.documentElement.lang;

        var compiled_desctiption = this._getFBDescription(palette_name);

        var params = {
            method: 'feed',
            link: 'http://#TODO-SHARELINK-URL##.com/' + lang + '/',
            picture: image_url,
            name: '#TODO-SHARE-TITLE',
            caption: '#TODO-ADDCOPY',
            description: compiled_desctiption
        };

        var FB = global.FB;
        FB.ui(params, function() {
            // Nothing needs to happen here..
        });
    };

    Core.prototype._getFBDescription = function(palette_name) {
        var original_settings = _.templateSettings;

        // Fixes the double %% in the django.po file when compiling a translation that is going to be used for templating
        _.templateSettings = {
            interpolate: /<<=(.+?)>>/g,
            evaluate: /<<(.+?)>>/g
        };

        var template;
        if(palette_name.length === 0) {
            template = _.template( $('#FBShareMissingName').html() );
        }
        else {
            template = _.template( $('#FBShareCopy').html() );
        }

        var compiled = template({description: palette_name});

        _.templateSettings = original_settings;

        return compiled;

    };
    
    Core.prototype.getPaletteImageUrl = function(palette_items) {
        var base_url = 'http://' + global.location.host;
        var lang = document.documentElement.lang;

        if(palette_items.length < 4) {
            return base_url + '/static/img/fb-share-' + lang + '.jpg';
        }

        return base_url + '/en/palette/<code>.png'.replace(/<code>/, palette_items.join('-'));
    };