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