xhp-lib
                                Class libraries for XHP. XHP is a Hack feature that augments the syntax of the language such that XML document fragments become valid Hack expressions.
                            
                        How to download and setup xhp-lib
Open terminal and run command
                                            git clone https://github.com/hhvm/xhp-lib.git
                                        
                                        git clone is used to create a copy or clone of xhp-lib repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with xhp-lib https://github.com/hhvm/xhp-lib/archive/master.zip
Or simply clone xhp-lib with SSH
                                            [email protected]:hhvm/xhp-lib.git                                    
                                    If you have some problems with xhp-lib
You may open issue on xhp-lib support forum (system) here: https://github.com/hhvm/xhp-lib/issuesSimilar to xhp-lib repositories
Here you may see xhp-lib alternatives and analogs
hhvm PhotoEditor jest botkit SkeletonView awesome-java-leetcode koala caprine rrssb hybridauth zuck.js facebook-sdk Messenger-for-Desktop Awesome-pytorch-list login-with system_design react-player SocialCount sharer.js facebook-tunnel messenger-bot jbot facebook-messenger play-authenticate purple-facebook facepy ProjectFib Simplicity socialite restfb