# myfirstextension addbutton ## Prerequisites * JupyterLab ## Installation ```bash jupyter labextension install myfirstextension ``` ## Development For a development install (requires npm version 4 or later), do the following in the repository directory: ```bash npm install npm run build jupyter labextension link . ``` To rebuild the package and the JupyterLab app: ```bash npm run build jupyter lab build ``` # myfirstextention