visibility.core.js
3 years ago
visibility.fallback.js
3 years ago
visibility.js
3 years ago
visibility.timers.js
3 years ago
visibility.fallback.js
54 lines
| 1 | // Add Page Visibility API support to old browsers by focus/blur hack. |
| 2 | // |
| 3 | // Include this script _before_ Visibility.js. |
| 4 | // |
| 5 | // Note, that this hack doesn’t correctly emulate Page Visibility API: |
| 6 | // when user change focus from browser to another window (browser and your |
| 7 | // page may stay visible), this hack will decide, that you page is hidden. |
| 8 | // |
| 9 | // For Firefox 5–9 it will be better to use MozVisibility hack without |
| 10 | // this issue. See <https://github.com/private-face/mozvisibility>. |
| 11 | ;(function (document) { |
| 12 | if ( document.visibilityState || document.webkitVisibilityState ) { |
| 13 | return; |
| 14 | } |
| 15 | |
| 16 | document.hidden = false; |
| 17 | document.visibilityState = 'visible'; |
| 18 | |
| 19 | var event = null |
| 20 | var i = 0 |
| 21 | var fireEvent = function () { |
| 22 | if( document.createEvent ) { |
| 23 | if ( !event ) { |
| 24 | event = document.createEvent('HTMLEvents'); |
| 25 | event.initEvent('visibilitychange', true, true); |
| 26 | } |
| 27 | document.dispatchEvent(event); |
| 28 | } else { |
| 29 | if ( typeof(Visibility) == 'object' ) { |
| 30 | Visibility._change.call(Visibility, { }); |
| 31 | } |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | var onFocus = function () { |
| 36 | document.hidden = false; |
| 37 | document.visibilityState = 'visible'; |
| 38 | fireEvent(); |
| 39 | }; |
| 40 | var onBlur = function () { |
| 41 | document.hidden = true; |
| 42 | document.visibilityState = 'hidden'; |
| 43 | fireEvent(); |
| 44 | } |
| 45 | |
| 46 | if ( document.addEventListener ) { |
| 47 | window.addEventListener('focus', onFocus, true); |
| 48 | window.addEventListener('blur', onBlur, true); |
| 49 | } else { |
| 50 | document.attachEvent('onfocusin', onFocus); |
| 51 | document.attachEvent('onfocusout', onBlur); |
| 52 | } |
| 53 | })(document); |
| 54 |