Improve error handling on graph.js (rendering)

glejeune / node-graphviz

Node.js interface to the GraphViz graphing tool

http://algorithmique.net

MIT License

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Open espona opened 3 years ago

espona commented 3 years ago

Handle the error when the dot command fails to run (ex. 'dot' is not installed).
Write to standard input only when the command is running.