Lightweight vanilla js Trapping tab key focus inside Element (just 2kb)

Lightweight vanilla js Trapping tab key focus function within the Element (just 1kb) , No dependencies

check demo here : https://idurar.github.io/vanilla-js-trapping-tab-key-focus/

### javascript code to open Modal

modal.open('idContent'); // to open Modal with wanted html content

// modal.close(); // to close Modal

### HTML code to insert in Modal

<div id="idContent" style="display:none">
 <!--your Modal html content here -->
</div>