render a webpage in an iframe code example

Example 1: how to open a website inside a website

<iframe src="https://www.codegrepper.com" width="100%" height="300px"
        title="website" style="border: 10px solid black;">
</iframe>

Example 2: iframe attributes

<iframe width="560" height="315" src="https://www.youtube.com/embed/owsfdh4gxyc" frameborder="0" allowfullscreen></iframe>