How to download and setup jqr
Open terminal and run command
                                            git clone https://github.com/ropensci/jqr.git
                                        
                                        git clone is used to create a copy or clone of jqr 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 jqr https://github.com/ropensci/jqr/archive/master.zip
Or simply clone jqr with SSH
                                            [email protected]:ropensci/jqr.git                                    
                                    If you have some problems with jqr
You may open issue on jqr support forum (system) here: https://github.com/ropensci/jqr/issuesSimilar to jqr repositories
Here you may see jqr alternatives and analogs
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