Using slider for my site

Can you please tell me the free ressources also
please tell me that if i use jquery or bootstrap will my site be violated by any copyright

free resources for what? freCodeCamp is a free resource. If you want something else you will need to be more specific.

jQuery and Bootstrap can be used, you import them in your project, and use them to build your project. If you copy a project built with them and say it’s your own, that’s not nice. If it’s copyrighted it is also not legal.

Alternatively, if you mean are jQuery and bootstrap under copyright, well, yes, but they have a licence saying you can use the code however you want