call-site.js

function first() {
  // call-stack: `first`
  // call-site: global-scope
  second(); //
}

function second() {
  // call-stack: `first->second`
  // call-site is in `first`
  third();
}

function third() {
  // call-stack: `first->second->third`
  // call-site is in `second`
  console.log("Hello World");
}

first();