Background Tasks API All In One

Background Tasks API All In One

性能优化

Cooperative Scheduling of Background Tasks API

后台任务协同调度 API

requestIdleCallback

window.requestIdleCallback = window.requestIdleCallback || function(handler) {
  let startTime = Date.now();
  return setTimeout(function() {
    handler({
      didTimeout: false,
      timeRemaining: function() {
        return Math.max(0, 50.0 - (Date.now() - startTime));
      }
    });
  },  0);
}

cancelIdleCallback

Web API

https://developer.mozilla.org/en-US/docs/Web/API/Background_Tasks_API

https://developer.mozilla.org/en-US/docs/Web/API/Window/requestIdleCallback

https://developer.mozilla.org/en-US/docs/Web/API/Window/cancelIdleCallback

demo

if (typeof globalThis.window.requestIdleCallback === 'function') {
  requestIdleCallback(() => {
    new Fingerprint().get(function (result, components) {
      console.log(result);
      console.log(components);
    });
  }, {
    timeout: 0,
  });
} else {
  setTimeout(function () {
    new Fingerprint().get(function (result, components) {
      console.log('result =', result);
      console.log('components =', components);
    });
  }, 0);
}

refs

refs

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