DeindentTemplateLiteralString

Exports a simple function that can be passed a template literal. It strips code indentation from it while preserving intended indentation, by stripping out the smallest indent every line has in common.

This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/511046/1460584/DeindentTemplateLiteralString.js

// ==UserScript==
// @name        DeindentTemplateLiteralString
// @license     Unlicense
// @namespace   1N07
// @match       *://*/*
// @version     1.2
// @author      1N07
// @description Exports a simple function that can be passed a template literal. It strips code indentation from it while preserving intended indentation, by stripping out the smallest indent every line has in common.
// ==/UserScript==

/**
 * Takes a string (usually evaluated from a template literal) and strips code indentation from it,
 * while preserving intended intendation, by slicing out the smallest indentation each line has in common.
 * @param {String} str
 * @returns str with code indentation removed
 */
function DeindentTemplateLiteralString(str) {
	const smallestIndent = Math.min(
		...str
			.split("\n")
			.filter((line) => line.trim())
			.map((line) => line.match(/^\s+/)?.[0]?.length),
	);
	return str
		.split("\n")
		.map((line) => line.slice(smallestIndent))
		.join("\n")
		.trim();
}

//aliases
const Deindent = DeindentTemplateLiteralString;