runnable at https://replit.com/@nathanhleung/quine, based on https://youtu.be/N-_XmLanPYg?t=1150. no self-reference!

quine.ts

// https://www.youtube.com/watch?v=N-_XmLanPYg

const BACKSLASH = String.fromCharCode(92);
const BACKTICK = String.fromCharCode(96);

function A() {
  const program = `function B(str: string) {
  function escapeProgram(str: string) {
    return str
      .replaceAll("\`", BACKSLASH + "\`")
      .replaceAll("\${", BACKSLASH + "\${");
  }

  function escapeStr(str: string) {
    return str
      .replaceAll(
        BACKTICK + "\${escapeProgram(str)}" + BACKTICK,
        BACKSLASH + BACKTICK + "\${escapeProgram(str)}" +
        BACKSLASH + BACKTICK
      );
  }

  function q(str: string) {
    return \`// https://www.youtube.com/watch?v=N-_XmLanPYg

const BACKSLASH = String.fromCharCode(92);
const BACKTICK = String.fromCharCode(96);

function A() {
  const program = \`\${escapeProgram(str)}\`;

  return program;
}\`
  }

  const A = q(str);
  console.log(A);
  console.log();
  console.log(escapeStr(str));
  console.log();
  console.log("B(A());")
}`;

  return program;
}

function B(str: string) {
  function escapeProgram(str: string) {
    return str
      .replaceAll("`", BACKSLASH + "`")
      .replaceAll("${", BACKSLASH + "${");
  }

  function escapeStr(str: string) {
    return str
      .replaceAll(
        BACKTICK + "${escapeProgram(str)}" + BACKTICK,
        BACKSLASH + BACKTICK + "${escapeProgram(str)}" +
        BACKSLASH + BACKTICK
      );
  }

  function q(str: string) {
    return `// https://www.youtube.com/watch?v=N-_XmLanPYg

const BACKSLASH = String.fromCharCode(92);
const BACKTICK = String.fromCharCode(96);

function A() {
  const program = \`${escapeProgram(str)}\`;

  return program;
}`
  }

  const A = q(str);
  console.log(A);
  console.log();
  console.log(escapeStr(str));
  console.log();
  console.log("B(A());")
}

B(A());