javascript - Fullscreen is not working on Iphone 6s and 5s -

i got problem fullscreen mode on iphone 6s , 5s - not work in chrome , safari others have no idea. don not have apple devices cannot reproduce myself - reported 1 of customers. have installed mac os siera on vmware , tested project safari - fine. going install xcode, internet weak long process... work fullscreen use such stuff:

/** @namespace */ const threex        = threex        || {}; threex.fullscreen   = threex.fullscreen || {};  export default threex.fullscreen;  /**  * test if possible have fullscreen  *  * @returns {boolean} true if fullscreen api available, false otherwise */ threex.fullscreen.available = function() {     return this._haswebkitfullscreen || this._hasmozfullscreen; }  /**  * test if fullscreen activated  *  * @returns {boolean} true if fullscreen activated, false otherwise */ threex.fullscreen.activated = function() {     if( this._haswebkitfullscreen ){         return document.webkitisfullscreen;     }else if( this._hasmozfullscreen ){         return document.mozfullscreen;     }else{         console.assert(false);     } }   threex.fullscreen.addeventlistener = function(element, handler) {     if (element.addeventlistener) {         element.addeventlistener('webkitfullscreenchange', handler, false);         element.addeventlistener('mozfullscreenchange', handler, false);         element.addeventlistener('fullscreenchange', handler, false);         element.addeventlistener('msfullscreenchange', handler, false);     } }  threex.fullscreen.removeeventlistener = function(element, handler) {     if (element.removeeventlistener) {         element.removeeventlistener('webkitfullscreenchange', handler, false);         element.removeeventlistener('mozfullscreenchange', handler, false);         element.removeeventlistener('fullscreenchange', handler, false);         element.removeeventlistener('msfullscreenchange', handler, false);     } }   function exithandler() {     if (document.webkitisfullscreen || document.mozfullscreen || document.msfullscreenelement !== null)     {         /* run code on exit */     } }  /**  * request fullscreen on given element  * @param {domelement} element make fullscreen. optional. default document.body */ threex.fullscreen.request   = function(element) {     element = element   || document.body;     if( this._haswebkitfullscreen ){         element.webkitrequestfullscreen();     }else if( this._hasmozfullscreen ){         element.mozrequestfullscreen();     }else{         console.assert(false);     } }  /**  * cancel fullscreen */ threex.fullscreen.cancel    = function() {     if( this._haswebkitfullscreen ){         document.webkitcancelfullscreen();     }else if( this._hasmozfullscreen ){         document.mozcancelfullscreen();     }else{         console.assert(false);     } }  threex.fullscreen._haswebkitfullscreen  = 'webkitcancelfullscreen' in document  ? true : false; threex.fullscreen._hasmozfullscreen = 'mozcancelfullscreen' in document ? true : false; 

the confusing thing is working device huawei honor 6 (android 4.4.2, chrome , firefox) , chrome dev tools emulation. problem? ios? why working android chrome , not ios chrome?

if see project or has iphone , can test - go http://3dflipbook.net, there jquery or wordpress plugin demos. pleasant details.

thanks in advance!

it seems found answer on question: ios safari not support fullscreen api http://caniuse.com/#feat=fullscreen. ios chrome more ios safari chrome http://www.mobilexweb.com/blog/chrome-ios-android-4-1-jelly-bean-html5.