AngularJS is not immediately responsive to changes in $window.document.visibilityState

Question

AngularJS is not immediately responsive to changes in $window.document.visibilityState

I am currently working with AngularJs version 1.4 and I need to be able to detect when a user is not on the tab of my app and when they return. To achieve this, I attempted using $watch in the following way:

$rootScope.$watch(angular.bind($window, function(document){
    return this.document.visibilityState
}), function (n, o) {
    if (n === 'visible' && o == 'hidden') {
        console.log('I'm back')
    }
})

The issue I am facing is that when I switch back to the tab, there is a significant delay before the response function triggers the change, approximately around 5 seconds.

Does anyone have any insight into why this might be happening?

javascript angularjs

Answer 1

Answer №1

One way to handle window focus in JavaScript is by using the onfocus and onblur events:

window.onblur = function() { console.log('Window blur event'); }
window.onfocus = function() { console.log('Window focus event'); }

This simple JavaScript code will log messages when the window loses or gains focus. In Angular, you can adapt this approach like so:

$window.onblur = function() { console.log('Window blur event'); }
$window.onfocus = function() { console.log('Window focus event'); }

Answer 2

One way to handle window focus in JavaScript is by using the onfocus and onblur events:

window.onblur = function() { console.log('Window blur event'); }
window.onfocus = function() { console.log('Window focus event'); }

This simple JavaScript code will log messages when the window loses or gains focus. In Angular, you can adapt this approach like so:

$window.onblur = function() { console.log('Window blur event'); }
$window.onfocus = function() { console.log('Window focus event'); }

AngularJS is not immediately responsive to changes in $window.document.visibilityState

Answer №1

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