JavaScript in 30 words
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The JavaScript Event Loop Explained Simply

The Event Loop monitors the Call Stack and the Callback Queue. If the Call Stack is empty, it pushes the first event from the queue to the Call Stack.

console.log("Start");
setTimeout(() => {
  console.log("Timer");
}, 0);
Promise.resolve().then(() => {
  console.log("Promise");
});
console.log("End");

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