Build Anchor Menu in Fred.

element.chunk.html

<section id="{{ anchortext|lower|replace({' ': ''}) }}" >
  <div class="container">
    <div class="row">
      <div class="col-lg-8 mx-auto text-center">
        <h2 class="section-heading" contenteditable="true" data-fred-name="head">Header</h2>
        <hr class="light my-4">
        <div class="text-faded mb-4 text-left" contenteditable="true" data-fred-name="text" data-fred-rte="true" data-fred-rte-config="text">
          <p>Some Text</p>
        </div> 
      </div>
    </div>
  </div>
</section>

fredMenu.snippet.php

<?php
$menu = null;
if(!empty($modx->resource)){
    $properties = $modx->resource->get('properties');
    if(!empty($properties) && is_array($properties) && !empty($properties['fred']) && !empty($properties['fred']['data'])){
        foreach($properties['fred']['data'] as $key=>$values){
            if(!empty($values) && is_array($values)){
                foreach($values as $value){
                    if(!empty($value['settings']) && !empty($value['settings']['anchortext'])){
                        $menu .= $modx->getChunk('fred-menu-tpl', array('anchortext'=>$value['settings']['anchortext'], 'link' => str_replace(" ","", strtolower($value['settings']['anchortext']))));
                    }
                }
            }
        }
    }
}
return $menu;

settings.chunk.json

{
    "settings":[
        {
            "name":"anchortext",
            "label":"Anchor Text",
            "type": "text",
            "value": null
        }
    ]
}