visable
Version:
This is a simple module that returns either true or false if a browser tab or window is visible
23 lines • 580 B
JavaScript
/////////////////////////////////////////
// main visibility API function
// check if current tab is active or not
const vis = (function () {
let stateKey,
eventKey,
keys = {
hidden: "visibilitychange",
webkitHidden: "webkitvisibilitychange",
mozHidden: "mozvisibilitychange",
msHidden: "msvisibilitychange"
};
for (stateKey in keys) {
if (stateKey in document) {
eventKey = keys[stateKey];
break;
}
}
return function (c) {
if (c) document.addEventListener(eventKey, c);
return !document[stateKey];
}
})();