JavaScript in 30 words
Browse all 40 concepts

JavaScript Call Stack Explained Simply

A Call Stack is a data structure that stores and manages function invocations. A kind of 'To-do list' for JavaScript that uses the Last In, First Out (LIFO) principle.

function save() {
  console.log("Saving");
}
function publish() {
  console.log("Starting");
  save();
  console.log("Published");
}
publish();

Read more about The call stack on MDN

AI panel

Ask AI to clarify the parts you don’t fully understand.

Connect your API key

Use your own API key for explanations and follow-up questions.

Get an API key ↗

Enter your API key and load your account’s models, or choose “Other model…” to enter a text model ID. You can change it later in Connection settings.

API usage is billed by your provider, separately from ChatGPT or Claude subscriptions. Loading models and connecting do not generate a paid answer.