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const myTest = (string) => {console.log(string)};

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/**
 * Hide <select> and submit-button
 */
#views-exposed-form-filter-articles-page-1 .form-type-select {
	display: none;
}
#views-exposed-form-filter-articles-page-1 .form-submit {
	display: none;
}

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(function ($) {

	/**
   * Set active class on Views AJAX filter 
   * on selected category
   */
  Drupal.behaviors.exposedfilter_buttons = {
    attach: function(context, settings) {
      $('.filter-tab a').on('click', function(e) {
        e.preventDefault();

leanderlindahl

popolo_custom.forms:
   version: VERSION
   css:
     theme:
       css/popolo_custom.theme.css: {}

popolo_custom.enable:
  version: VERSION
  js:
    js/popolo_custom.js: {}

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<?php
function popolo_custom_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id){
    
  /**
   * Apply the form_alter to a specific form #id
   * the form #id can be found through inspecting the markup
   */
  if($form['#id'] == 'views-exposed-form-filter-articles-page-1') {

  /**

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name: Popolo Custom
type: module
description: 'Example module for Drupal 8.'
package: Custom
version: 8.x
core: 8.x

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In your themes functions.php:
add_filter( 'embed_oembed_html', 'custom_oembed_filter', 10, 4 ) ;

function custom_oembed_filter($html, $url, $attr, $post_ID) {
    $return = '<div class="video-container">'.$html.'</div>';
    return $return;
}

In your themes css:
.video-container {

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(function ($) {
  /**
   * Set active class on Views AJAX filter 
   * on selected category
   */
  Drupal.behaviors.exposedfilter_buttons = {
    attach: function(context, settings) {
      $('.filter-tab a').on('click', function(e) {
        e.preventDefault();
        

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<?php 

function exposedfilter_buttons_form_alter(&$form, &$form_state, $form_id) {
  /**
   * Manipulate output of Views Ajax Exposed filter 
   */
  if ($form['#id'] == 'views-exposed-form-exposed-filter-example-block') {
    $form['#attached']['js'] = array(
      drupal_get_path('module', 'exposedfilter_buttons') . '/js/exposedfilter_buttons.js',
    );