bun.sh/test/snippets/template-literal.js

const css = (templ) => templ.toString();

const fooNoBracesUTF8 = css`
  before
  /* */
  after
`;

const fooNoBracesUT16 = css`
  before
  🙃
  after
`;
const fooUTF8 = css`
    before
  ${true}
    after

`;

const fooUTF16 = css`
    before
    🙃 ${true}
    after

`;

const templateLiteralWhichDefinesAFunction = ((...args) =>
  args[args.length - 1]().toString())`
    before
    🙃 ${() => true}
    after

`;

export function test() {
  for (let foo of [fooNoBracesUT16, fooNoBracesUTF8, fooUTF16, fooUTF8]) {
    console.assert(
      foo.includes("before"),
      `Expected ${foo} to include "before"`,
    );
    console.assert(foo.includes("after"), `Expected ${foo} to include "after"`);
  }

  console.assert(
    templateLiteralWhichDefinesAFunction.includes("true"),
    "Expected fooFunction to include 'true'",
  );

  return testDone(import.meta.url);
}