Theme development

Hello , gyus, hope you can help me.

How redeclare fumction rdf module?

I want rewrite funciton module module rdf

http://prntscr.com/jarn2z

http://prntscr.com/jarngu

I type in template.php 

http://prntscr.com/jarnvh

But it's not redacle or mistake sometimes.

HOw can i type my url, redacle this function rdf module in teamplate.php?

I need a different form field rendering depending on the form attributes.

In general, does anybody know a way of getting the parent of the current element in preprocess and suggestions theme hooks?

Just a curiosity, I've got a D8 sub theme that I'd like to control some specific content for. Part of that content is 3 links on the main menu that are only relevant if this theme is used. I thought maybe the theme install worked similar to the module install and process a .links.menu.yml file if one existed in the theme. 

Anyway, curious if this is supported or not and if it is, what I may be doing wrong. Thanks

I'm trying to rebuild the Bootstrap 3.3.7 menu to Bootstrap 4.1
In links it is necessary to receive a class active instead of is-active

{% import _self as menus %}

{{ menus.menu_links(items, attributes, 0) }}

{% macro menu_links(items, attributes, menu_level) %}
{% if items %}
{% if menu_level == 0 %}
<ul class="navbar-nav mr-auto">

{% for item in items %}

Hi,

I recently found out that Foundation 6 uses Angular instead of JQuery. This has thrown me for a bit of a loop.

I was able to install AngularJS into my D8 site. But, I need some guidance because I am weak when it comes to Javascript. I have been searching through different posts inside and outside of drupal.org and none seems to be on target with AngularJS, D8 and Foundation 6.

Here is my libraries.yml file: