vue-hooks-plus/es/useRequest/utils/subscribeReVisible.js

Vue hooks library

import isDocumentVisible from "./isDocumentVisible";
import { canUseDom } from "./utils";
const listeners = [];
function subscribe(listener) {
  listeners.push(listener);
  return function unsubscribe() {
    const index = listeners.indexOf(listener);
    listeners.splice(index, 1);
  };
}
if (canUseDom()) {
  const revalidate = () => {
    if (!isDocumentVisible())
      return;
    for (let i = 0; i < listeners.length; i++) {
      const listener = listeners[i];
      listener();
    }
  };
  window.addEventListener("visibilitychange", revalidate, false);
}
export {
  subscribe as default
};