Check out example codes for "iframe in html". It will help you in understanding the concepts better.

Code Example 1

<iframe src="demo_iframe.htm" height="200" width="300"></iframe>

Code Example 2

<iframe src="http://www.codegrepper.com"></iframe>

Code Example 3

<iframe src="https://www.w3schools.com"></iframe>

Code Example 4

<iframe src="yourURL" height="200" width="300"></iframe>

Code Example 5

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

Code Example 6

<iframe src="myURL" width="300" height="300" frameBorder="0">Browser not compatible.</iframe>

Learn ReactJs, React Native from akashmittal.com