How to avoid accidentally implicitly referring to properties on the global object?

Question

Is it possible to execute a block of code without the implicit with(global) context that all scripts seem to have by default? For example, in a browser, would t

Answer 1

Perhaps slightly cleaner (YMMV) is to set getter traps (like you did), but in a worker so that you don't pollute your main global scope. I didn't need to use with though, so perhaps that is an improvement.

Worker "Thread"

//worker; foo.js
addEventListener('message', function ({ data }) {
  try {
    eval(`
      for (k in self) {
        Object.defineProperty(self, k, {
          get: function () {
            throw new ReferenceError(':(');
          }
        });
      }
      // code to execute
      ${data}
    `);
    postMessage('no error thrown ');
  } catch (e) {
    postMessage(`error thrown: ${e.message}`);
  }
});

Main "Thread"

var w = new Worker('./foo.js');
w.addEventListener('message', ({data}) => console.log(`response: ${data}`));
w.postMessage('const foo = location');

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Another option that may be worth exploring is Puppeteer.