JavaScript setInterval & setTimeout Guide

In JavaScript, both setInterval and setTimeout are methods used to execute a piece of code at a specific time interval in the future.

1. Set a recurring interval

// 每隔1秒执行一次
setInterval(function() {
  console.log('Hello');
}, 1000);

1. Delay the execution of a piece of code.

// 2秒后执行一次
setTimeout(function() {
  console.log('Hello');
}, 2000);

setInterval will repeatedly execute a specified function at specific time intervals, whereas setTimeout will only execute the specified function once.