PhpStorm warning on HTML comment-CodePudding

PHP 8.0
PhpStorm 2021.2
Runtime version: 11.0.11 9-b1504.13 amd64
Windows 10

I am receiving warnings "Selector matches unknown element suppress" and "Selector matches unknown element JSUnresolvedLibraryURL" in PhpStorm for the following:

<!doctype html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <title><?=$title?></title>
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta name="Description" content="Real Estate for sale <?=$fullAddress?>. MLS <?=$MLS?>">
    <!--suppress JSUnresolvedLibraryURL -->
    <script src='https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js'></script>
</head>

It runs without error, but I would like to understand the why behind the warning and resolve it.

CodePudding user response：

you must have some language injected in the comments. Please check language injections with IDE and Project scopes in Preferences | Editor | Language Injections.