Hey guys, I am dealing with a problem that I cannot solve. I have an html file index.html where I have a normal html content, head body etc. A normal webpage in which I want to inject a modal. I cannot modify the source of this index.html but I can add a <script> in the head of this file. Now what I did is I added this js file in which I created 2 variables in which I collected head and body of this main html file. After I created 2 new variables, let’s say new_head and new_body in which I wrote some css and html that will be added to main html using Element.insertAdjacentHTML().