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function stringHash (string)
{
	/* This is based on https://github.com/darkskyapp/string-hash
	Since the basic code is public domain, this function is public domain as well.
	 */
	let hash, i = string.length;
	while (i)
	{
		hash = (hash * 33) ^ string.charCodeAt(--i);
	};

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function localeIsoDateString(date = new Date())
{
  let timezoneOffsetHours = (new Date()).getTimezoneOffset() * 60 * 1000;
  let timezoneAsString = ["+", "+", "-"][Math.sign(timezoneOffsetHours) + 1] + (new Date(Math.abs(timezoneOffsetHours)).toISOString().substr(11, 5));
  return new Date(date.getTime() - timezoneOffsetHours).toISOString().substr(0, 23) + timezoneAsString;
};

// Expected output (for Central European Summer Time): 2021-07-14T10:34:01.830+02:00

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JavaScript Gradient Color Calculation

This is a small function to calculate a color (RGB) at a specific gradient location.

function gradientColor(percentage, stops)

• percentage is the desired position. It is a number between (including) 0 and 1. Values less then 0 will be set to 0, values greater than 1 will be set to 1.
• stops is an array of the gradient stops (see example).

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prettyPrintXml = function (xmlString)
{
  /* linearize */
	let result = xmlString.replace(/>\s*</g, "><").trim();
	/* simplify empty tags */
	result = result.replace(/<(\S+)([^>]*)><\/\1>/g, "<$1$2/>");
	/* remove spaces at tag end */
	result = result.replace(/\s+(\/?>)/g, "$1");
	/* remove too many spaces before attributes */
	result	= result.replace(/\s+(\s\S+="\S+")/g, "$1");