Experiments towards a custom context from hell

context-test.js

const sleep = (t) => new Promise(resolve => setTimeout(resolve, t));

// must be function & cannot be strict mode
function withContext(context, next) {
  return next();
}

const getContext = () => withContext.arguments[0];

const logContext = (label) => function () {
  console.log(`${label} has context:`, getContext());
};

const contextTest1 = () => {
  withContext({foo: 1}, logContext('contextTest1'));
};

// contextTest1();

const twice = (label, t) => async () => {
  const log = logContext(label)
  await sleep(t);
  log();
  await sleep(t);
  log();
  await sleep(t);
};

const contextTest2 = async () => {
  await withContext({foo :2}, twice('contextTest2', 500));
};

// contextTest2();

const contextTest3 = () => {
  const log1 = logContext('contextTest3.1');
  const log2 = logContext('contextTest3.2');

  withContext({foo: 3.1},() => {
    log1();
    withContext({foo: 3.2}, log2);
    log1();
  });
};

// contextTest3();