javascript - Prevent Multiple Instances for SetInterval

Question

What is the most recommended/best way to stop multiple instances of a setInterval function from being created (in javascript) and call it only once?

标签： javascriptnode.js

Answer 1

setInterval返回一个间隔 id，您可以使用它来检查它是否已经被实例化。例如：

let intervalId

const someFunction = () => {
  intervalId = setInterval(someOtherFunction, 1000)
}

const someThirdFunction () => {
  if (!intervalId) {
    intervalId = setInterval(someOtherFunction, 1000)
  }
}