Change HTML Page Size using JavaScript

I have an HTML page set to a certain size since I use it for printing.

@page {
		size: A4 portrait;
		margin: 1%;
}

I want to add a feature where I can change the size of the page using JavaSript. Now, how do I access the @page on JavaScript?

Level 63

Why not using spatie BrowserShot package ?

You could generate a printable PDF from the HTML page with no problem about the size of the page.

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