juggledad

## README.md

      
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              July 12, 2019 12:06
            
              
                EXAMPLE - using an external javascript in a function node
              
          
    This example show how to use an eternal NPM javascript in a function node. This example uses tinycolor.js to test an RGB color to see if it is 'light' or 'dark'.
** Setup **

Go to the node-red directory


cd .node-red


Install tinycolor.js


npm install tinycolor2.js


Backup your settings file incase something goes wrong.


cp settings.js settings.bkup


Edit settings.js and find the section  functionGlobalContext: { it should look like this


## README.md

      
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                juggledad
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              June 20, 2020 09:29
            
              
                Using environmental variables (system or user defined)
              
          
    Environmental variables (enter ‘env’ in a terminal to see which can be used) can be accessed by adding:
env: process.env

to the ‘functionGlobalContext:’ section of the settings.js file. Once entered you can access them in any node that has a text field (a/z) or in a function node.
SPECIAL CASES:
If you want to use HOSTNAME or declare your own environmental variable, you must make an additional change to the settings.js file. Add the following lines just before the line ‘module.exports = {‘: