timersPromises.setInterval([delay[, value[, options]]])

返回异步迭代器，以 delay 毫秒的间隔生成值。

• delay <number> 迭代之间等待的毫秒数。 默认值: 1。
• value <any> 迭代器返回的值。
• options <Object>
  • ref <boolean> 设置为 false 以指示迭代之间的调度的 Timeout 不应要求 Node.js 事件循环保持活动状态。 默认值: true。
  • signal <AbortSignal> 可选的 AbortSignal，可用于在操作之间取消调度的 Timeout。

import {
  setInterval,
} from 'timers/promises';

const interval = 100;
for await (const startTime of setInterval(interval, Date.now())) {
  const now = Date.now();
  console.log(now);
  if ((now - startTime) > 1000)
    break;
}
console.log(Date.now());const {
  setInterval,
} = require('timers/promises');
const interval = 100;

(async function() {
  for await (const startTime of setInterval(interval, Date.now())) {
    const now = Date.now();
    console.log(now);
    if ((now - startTime) > 1000)
      break;
  }
  console.log(Date.now());
})();

Returns an async iterator that generates values in an interval of delay ms.

• delay <number> The number of milliseconds to wait between iterations. Default: 1.
• value <any> A value with which the iterator returns.
• options <Object>
  • ref <boolean> Set to false to indicate that the scheduled Timeout between iterations should not require the Node.js event loop to remain active. Default: true.
  • signal <AbortSignal> An optional AbortSignal that can be used to cancel the scheduled Timeout between operations.

import {
  setInterval,
} from 'timers/promises';

const interval = 100;
for await (const startTime of setInterval(interval, Date.now())) {
  const now = Date.now();
  console.log(now);
  if ((now - startTime) > 1000)
    break;
}
console.log(Date.now());const {
  setInterval,
} = require('timers/promises');
const interval = 100;

(async function() {
  for await (const startTime of setInterval(interval, Date.now())) {
    const now = Date.now();
    console.log(now);
    if ((now - startTime) > 1000)
      break;
  }
  console.log(Date.now());
})();