MutationObserver, IntersectionObserver
Shadow DOM: <slot>
Events: touchstart, touchmove, touchend
json functions: json_decode, json_encode etc
file_get_contents
Apple Map and MapKit Js
wp-load.php
$wpdb
add_filter( ‘the_posts’, …) VS. add_action( ‘pre_get_posts’, …)
Задача: список запрещённых слов
mb functions (mb_strtolower, mb_strpos)
