This was asked quite a while back - but I thought that I will answer since it came up in related google search - as of now - you can still either write it yourself or use a library (such as syncfusion range slider that is packed with nice features including this which they call "range selector").

I am not affiliated with them but they have a nice set of packages, and you will be able to use them for free under the community license if you fit the terms (afaik - up to 5 developers in company and up to 1 million USD revenue per year allow you to get it for free).

Have fun