Hi,

I think there should be more information, what you want to do ... at the moment, one can only see:

• you are embedding a linked source into an iframe
• there is some JavaScript that interacts with DOM elements on your site – but you did not provide them, so the JS could not be relevant for your question

What exactly is your "excel online" file looking like? What do you want to do with it? And could you provide a fully working example?

For having an interactive spreadsheet editor without embedding another tool / website / web app via iframe, you should consult JavaScript tools, since plain PHP / Blade code will always be finally rendered on the server side and the user only can interact with some kind of forms ...
Have a look at jspreadsheets.com if that's what you're looking for! =)

Cheers,
Martin