Hijacked by @JoshuaKGoldberg on September 4th, 2023: see #12 (comment). Now accepting PRs for a dedent({ recursive: true }) option.

const a = dedent`
hello
  world
`;
const b = dedent`
  foo.
  ${a}
  bar.
`;

results in

foo.
hello
world
bar.

instead of

foo.
hello
  world
bar.

This is unfortunate because it would be nice to compose dedented strings.

If you decide to fix this, any test cases should also check that inlined dedents make sense:

const weird = dedent`
  foo.
  ${things.map(x => dedent`
    hello
      world
  `).join('\n')}
  bar.
`;