Instagram Background Play

Keep Instagram videos and reels playing when you switch tabs or apps. Stops Instagram from pausing playback the moment you look away, and keeps picture-in-picture live instead of frozen.

您需要先安裝使用者腳本管理器擴展,如 TampermonkeyGreasemonkeyViolentmonkey 之後才能安裝該腳本。

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyViolentmonkey 後才能安裝該腳本。

您需要先安裝使用者腳本管理器擴充功能,如 TampermonkeyUserscripts 後才能安裝該腳本。

你需要先安裝一款使用者腳本管理器擴展,比如 Tampermonkey,才能安裝此腳本

您需要先安裝使用者腳本管理器擴充功能後才能安裝該腳本。

(我已經安裝了使用者腳本管理器,讓我安裝!)

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展,比如 Stylus,才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

你需要先安裝一款使用者樣式管理器擴展後才能安裝此樣式

(我已經安裝了使用者樣式管理器,讓我安裝!)

// ==UserScript==
// @name         Instagram Background Play
// @description  Keep Instagram videos and reels playing when you switch tabs or apps. Stops Instagram from pausing playback the moment you look away, and keeps picture-in-picture live instead of frozen.
// @version      1.0.3
// @author       Zingzy
// @namespace    https://github.com/Zingzy/instagram-background-play
// @homepageURL  https://github.com/Zingzy/instagram-background-play
// @supportURL   https://github.com/Zingzy/instagram-background-play/issues
// @match        https://www.instagram.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=instagram.com
// @license      MIT
// @run-at       document-start
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  // Instagram pauses playback as soon as the tab or window loses focus.
  // It detects this through the Page Visibility API and focus events,
  // and additionally calls pause() from its own player logic.
  // This script defuses all three paths.

  // Keep a handle on the real visibility getter before spoofing it,
  // so we can still tell when the tab is genuinely hidden.
  const nativeVisibility = Object.getOwnPropertyDescriptor(
    Document.prototype,
    'visibilityState'
  ).get;
  const reallyHidden = () => nativeVisibility.call(document) !== 'visible';

  // 1. Spoof the Page Visibility API: the page always reports "visible".
  Object.defineProperty(Document.prototype, 'visibilityState', {
    get: () => 'visible',
    configurable: true,
  });
  Object.defineProperty(Document.prototype, 'hidden', {
    get: () => false,
    configurable: true,
  });
  document.hasFocus = () => true;

  // 2. Swallow the events Instagram listens to for detecting you leaving.
  //    Capturing on window runs before any page listener can react.
  const block = (e) => e.stopImmediatePropagation();
  for (const type of [
    'visibilitychange',
    'webkitvisibilitychange',
    'blur',
    'focusout',
    'pagehide',
    'freeze',
  ]) {
    window.addEventListener(type, block, true);
  }

  // 3. The hammer: drop programmatic pause() calls while the tab is
  //    actually backgrounded. Manual pauses still work, since they happen
  //    while the tab is visible or go through browser UI (like
  //    picture-in-picture controls) which bypasses this method entirely.
  const nativePause = HTMLMediaElement.prototype.pause;
  HTMLMediaElement.prototype.pause = function () {
    if (reallyHidden()) return;
    return nativePause.call(this);
  };
})();