Angular 2 App not loading, and there's not error -


my angular2 app has been working. not sure did, it's getting stuck @ loading, , there's no error message. when use firefox, pops warning: unresponsive script

"a script on page may busy, or may have stopped responding. can stop script now, open script in debugger, or let script continue.

script: http://10.60.3.12/polyfills.8ee51304bf305725cfc5.bundle.js:36"

i have been sitting here day trying find problem. use angular-cli created new project, , manually copied source files new project folder. compiles successfully, app won't load.

any appreciated!

thank you!

edit: when run local dev mode. compiles successfully

titan:sumo-app eric$ ng serve ** ng live development server running on http://localhost:4200 ** hash: 840cec4b0f63776f7cf8                                                    - time: 11228ms chunk    {0} polyfills.bundle.js, polyfills.bundle.js.map (polyfills) 158 kb {4} [initial] [rendered] chunk    {1} main.bundle.js, main.bundle.js.map (main) 183 kb {3} [initial] [rendered] chunk    {2} styles.bundle.js, styles.bundle.js.map (styles) 10.4 kb {4} [initial] [rendered] chunk    {3} vendor.bundle.js, vendor.bundle.js.map (vendor) 4.19 mb [initial] [rendered] chunk    {4} inline.bundle.js, inline.bundle.js.map (inline) 0 bytes [entry] [rendered] webpack: compiled successfully.

i made screen shots when go localhost firefox. first screen shot gets stuck. laptop fan starts spinning , getting loud when gets stuck here. second screen shot shows error 304 inspector.

enter image description here

enter image description here

edit: code below causing problem. use check if user logged in or if token expired. don't understand how code causing app not loading.

    loggedin(){      let expiration = new date(json.parse(localstorage.getitem('expiration')))     let = new date()     let t = localstorage.getitem('token')     if (t == null || expiration == null) {          this.logout()         return false      }      let u = localstorage.getitem('currentuser')         if (u != null){             this.user = json.parse(localstorage.getitem('currentuser'))         }else {             this.logout()             return false         }     if (now > expiration ){         this.logout()         return false     }      return true;  }


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