A simple JavaScript function/tag function that removes extra levels of indentation. Useful when embedding code in a template literal that is further indented.

unindent.js

const unindent = (template, ...substitutions) => {
    const string = String.raw({ raw: template.raw || [template] }, ...substitutions).trimEnd().replace(/^\s*\n/, '');
    const indent = (string.match(/^[ \t]*(?=\S)/gm) || []).map(i => i.length).reduce((a, b) => Math.min(a, b));
    return string.replace(new RegExp(String.raw`^[ \t]{${indent}}`, 'gm'), '');
};