'Write HTML Tag in confirm or alert box in javascript

I need to achieve something similar to the following

confirm ('<h1>Hello</h1>')

The expected output should be the Hello in confirm box with h1 element font-size

javascript html jquery

Solution 1:^[1]

You can't customize the alert box because it is a system object. If you need customization, you will need to create your own HTML element.

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Solution	Source
Solution 1	Matteo