I do not think there are any better ways than those mentioned but this is a way that I got round the problem (not my original idea) if looking to store more than 1 function.

Use a `function node`

to keep the required functions, with an `inject node`

set to inject at startup

An example

```
const utility = (function () {
'use strict';
/*
* Functions Available
*
* scale,
* ordinal,
* isString,
*
*/
/**
*
* @param {number} number Number of range to scale
* @param {number} inMin Minimum of range to scale
* @param {number} inMax Maximum of range to scale
* @param {number} outMin Minimum of range to be scaled to
* @param {number} outMax Maximum of range to be scaled to
*
* Example scale(20, 0, 100, 15, 30) Results in a number in range [0 - 100] being ouput as a number in range [15 - 30]
*
*/
function scale (number, inMin, inMax, outMin, outMax) {
return (number - inMin) * (outMax - outMin) / (inMax - inMin) + outMin
} // End Function scale()
/**
* Description
*
* @param {string | number} number - The item to check
* @param {boolean} inclusive - Append ordinal to number if true. Defaults to true
*
* @return {string} - The ordinal suffix for provided number. If inclusive is true returns number + ordinal
*
* @Example let monthDay = ordinal(21, true); => 21st
*/
function ordinal(number, inclusive = true) {
let x = Number(number)
const ORDINAL = ["th", "st", "nd", "rd"][(x = ~~(x < 0 ? -x : x) % 100) > 10 && x < 14 || (x %= 10) > 3 ? 0 : x]
return (inclusive) ? number + ORDINAL : ORDINAL
} // End Function ordinal()
/**
* Description Determines whether or not supplied argument is of type 'string'.
*
* @param {*} strValue - The argument to check.
*
* @return {boolean} - True if the argument is of type 'string', otherwise false.
*/
function isString(strValue) {
return ((typeof strValue === 'string') || (strValue instanceof String))
} // End Function isString()
return {
scale,
ordinal,
isString,
}
}())
global.set('utility', utility, 'file')
```

Functions are used by calling;

```
const utility = global.get('utility', 'file')
let possibleString = 'jdf'
let isString = utility.isString(possibleString)
```

Simple example flow

```
[{"id":"6d067867ce6a2d06","type":"function","z":"8428164b1645b4b8","name":"Library","func":"const utility = (function () {\n 'use strict';\n\n /*\n * Functions Available\n *\n * scale,\n * ordinal,\n * isString,\n\n *\n */\n\n /**\n * \n * @param {number} number Number of range to scale\n * @param {number} inMin Minimum of range to scale\n * @param {number} inMax Maximum of range to scale\n * @param {number} outMin Minimum of range to be scaled to\n * @param {number} outMax Maximum of range to be scaled to\n * \n * Example scale(20, 0, 100, 15, 30) Results in a number in range [0 - 100] being ouput as a number in range [15 - 30]\n * \n */\n\n function scale(number, inMin, inMax, outMin, outMax) {\n return (number - inMin) * (outMax - outMin) / (inMax - inMin) + outMin\n\n } // End Function scale()\n\n\n\n /**\n * Description \n * \n * @param {string | number} number - The item to check\n * @param {boolean} inclusive - Append ordinal to number if true. Defaults to true\n * \n * @return {string} - The ordinal suffix for provided number. If inclusive is true returns number + ordinal\n *\n * @Example let monthDay = ordinal(21, true); => 21st\n */\n\n function ordinal(number, inclusive = true) {\n let x = Number(number)\n const ORDINAL = [\"th\", \"st\", \"nd\", \"rd\"][(x = ~~(x < 0 ? -x : x) % 100) > 10 && x < 14 || (x %= 10) > 3 ? 0 : x]\n\n return (inclusive) ? number + ORDINAL : ORDINAL\n\n } // End Function ordinal()\n\n\n /**\n * Description Determines whether or not supplied argument is of type 'string'.\n * \n * @param {*} strValue - The argument to check.\n * \n * @return {boolean} - True if the argument is of type 'string', otherwise false.\n */\n\n function isString(strValue) {\n return ((typeof strValue === 'string') || (strValue instanceof String))\n\n } // End Function isString()\n\n\n return {\n\n scale,\n ordinal,\n isString,\n\n }\n\n}())\n\nglobal.set('utility', utility, 'file')","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":310,"y":1180,"wires":[["42d772a9a7b90346"]]},{"id":"79fbe6817cbb7300","type":"function","z":"8428164b1645b4b8","name":"Test Library","func":"const utility = global.get('utility', 'file')\n\nfunction isString(strValue) {\n return ((typeof strValue === 'string') || (strValue instanceof String))\n}\n\nlet possibleString = 'jdf'\nlet ifString = utility.isString(possibleString)\n\nmsg.payload = ifString\n\nreturn msg","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":350,"y":1240,"wires":[["4797811e083e1e8b"]]},{"id":"9341e34e33086a04","type":"inject","z":"8428164b1645b4b8","name":"Startup","props":[],"repeat":"","crontab":"","once":true,"onceDelay":0.1,"topic":"","x":120,"y":1180,"wires":[["6d067867ce6a2d06"]]},{"id":"42d772a9a7b90346","type":"debug","z":"8428164b1645b4b8","name":"Library Out","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":550,"y":1180,"wires":[]},{"id":"2859e1c24558295a","type":"inject","z":"8428164b1645b4b8","name":"Trigger Test","props":[],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","x":130,"y":1240,"wires":[["79fbe6817cbb7300"]]},{"id":"4797811e083e1e8b","type":"debug","z":"8428164b1645b4b8","name":"Test Output","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":590,"y":1240,"wires":[]}]
```