How to add both text and images into textbox

In facebook's chatbox, there's no textarea it's a div, also if you are making an input which contains images you could use quill.js

If you use an image inside a text area field, you have to use this:

<p><img src="ENTER URL HERE" height="ENTER HEIGHT HERE" width="ENTER WIDTH HERE"></p>

You can use https://www.tiny.cloud/ or other similar javascript libraries to customize textarea html tag.