I need to get the last part of my URL with html on the end. So if I have this url `http://step/build/index.html` I need to get only `index.html`. I need to do this with javascript

```
let address = http://step/build/index.html;
let result = address.match(/html/i);

```

I tried this, but it doesn't work for me, maybe I make some mistakes. 
[How do I get the last segment of URL using regular expressions](https://stackoverflow.com/questions/8798187/how-do-i-get-the-last-segment-of-url-using-regular-expressions)
Could someone help me and explain it in details?
Thank you.