Makes tabs and windows think they're visible even when they're not.
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/456228/1125940/Absolute%20Visibility.js
const knife = `const script = document.currentScript;
const isFirefox = /Firefox/.test(navigator.userAgent) || typeof InstallTrigger !== 'undefined';
const block = e => {
e.preventDefault();
e.stopPropagation();
e.stopImmediatePropagation();
};
const once = {
focus: true,
visibilitychange: true,
webkitvisibilitychange: true
};
/* visibility */
Object.defineProperty(document, 'visibilityState', {
get() {
return 'visible';
}
});
if (isFirefox === false) {
Object.defineProperty(document, 'webkitVisibilityState', {
get() {
return 'visible';
}
});
}
document.addEventListener('visibilitychange', e => {
script.dispatchEvent(new Event('state'));
if (script.dataset.visibility !== 'false') {
if (once.visibilitychange) {
once.visibilitychange = false;
return;
}
return block(e);
}
}, true);
document.addEventListener('webkitvisibilitychange', e => {
if (script.dataset.visibility !== 'false') {
if (once.webkitvisibilitychange) {
once.webkitvisibilitychange = false;
return;
}
return block(e);
}
}, true);
window.addEventListener('pagehide', e => script.dataset.visibility !== 'false' && block(e), true);
/* hidden */
Object.defineProperty(document, 'hidden', {
get() {
return false;
}
});
Object.defineProperty(document, isFirefox ? 'mozHidden' : 'webkitHidden', {
get() {
return false;
}
});
/* focus */
Document.prototype.hasFocus = new Proxy(Document.prototype.hasFocus, {
apply(target, self, args) {
if (script.dataset.focus !== 'false') {
return true;
}
return Reflect.apply(target, self, args);
}
});
const onfocus = e => {
if (script.dataset.focus !== 'false') {
if (e.target === document || e.target === window) {
if (once.focus && document.readyState === 'complete' && e.target === window) {
once.focus = false;
return;
}
return block(e);
}
}
};
// document.addEventListener('focus', onfocus, true);
window.addEventListener('focus', onfocus, true);
/* blur */
const onblur = e => {
if (script.dataset.blur !== 'false') {
if (e.target === document || e.target === window) {
return block(e);
}
}
};
document.addEventListener('blur', onblur, true);
window.addEventListener('blur', onblur, true);
/* mouse */
window.addEventListener('mouseleave', e => {
if (script.dataset.mouseleave !== 'false') {
if (e.target === document || e.target === window) {
return block(e);
}
}
}, true);
/* requestAnimationFrame */
let lastTime = 0;
window.requestAnimationFrame = new Proxy(window.requestAnimationFrame, {
apply(target, self, args) {
if (script.dataset.hidden === 'true') {
const currTime = Date.now();
const timeToCall = Math.max(0, 16 - (currTime - lastTime));
const id = window.setTimeout(function() {
args[0](performance.now());
}, timeToCall);
lastTime = currTime + timeToCall;
return id;
} else {
return Reflect.apply(target, self, args);
}
}
});
window.cancelAnimationFrame = new Proxy(window.cancelAnimationFrame, {
apply(target, self, args) {
if (script.dataset.hidden === 'true') {
clearTimeout(args[0]);
}
return Reflect.apply(target, self, args);
}
});`;
(function eyeStabber() {
let body, script;
body = document.getElementsByTagName("body")[0];
if (!body) {window.location.reload();}
script = document.createElement("script");
script.setAttribute("type", "text/javascript");
script.innerHTML = knife;
body.appendChild(script);
script.remove();
})();