javascript - How to create an enumeration or where should I store it? -

i have been using extjs , find myself doing lot of checking using "magic" strings. use sort of enumeration i.e

colors.red, colors.white

etc

does extjs support this, using version 4.2.

also if need create new class or correct place ?

i have

  /app    controller    store    models    views     etc 

these don't seem correct location these controllers, views, models, stores ..

where advisable place create things don't fit above ?

this can done differently, , it's give inspiration.

what have done in app creating folder enums in app folder. in folder put enums want use in app. aware use alternateclassname , uppercase make them more enum-like.

just enum:

ext.define('myapp.enums.orientation', {     alternateclassname: ['orientation'],      statics: {         portraitprimary: 'portrait-primary', // orientation in primary portrait mode.         portraitsecondary: 'portrait-secondary', // orientation in secondary portrait mode.         landscapeprimary: 'landscape-primary', // orientation in primary landscape mode.         landscapesecondary: 'landscape-secondary', // orientation in secondary landscape mode.         portrait: 'portrait', // orientation either portrait-primary or portrait-secondary.         landscape: 'landscape' // orientation either landscape-primary or landscape-secondary.     } }); 

i can use this:

myapp.util.cordovaplugins.lockorientation(orientation.landscape); 

where lockorientation looks this:

/**  * lock viewport in orientation , disallow rotation using cordova screen orientation plugin  * see [github.com/gbenvenuti/cordova-plugin-screen-orientation](https://github.com/gbenvenuti/cordova-plugin-screen-orientation)  * more details.  *  * usage:  * myapp.util.cordovaplugins.lockorientation(orientation.landscape);  *  * possible orientations:  * orientation.portraitprimary  * orientation.portraitsecondary  * orientation.landscapeprimary  * orientation.landscapesecondary  * orientation.portrait  * orientation.landscape  *  * @param {enum} orientation value of type myapp.enums.orientation orientate view in given orientation.  */ lockorientation: function(orientation) {     if (orientation.hasownproperty(orientation.touppercase())) {         screen.lockorientation(orientation);     }     else {         ext.logger.error('the given orientation not prohibited.');     } } 

another enum:

ext.define('myapp.enums.positionerror', {     alternateclassname: ['positionerror'],      statics: {         permission_denied: 1,         position_unavailable: 2,         timeout: 3     } }); 

usage:

getgpserrortitlebyerrorcode: function(errorcode) {     var title;      switch (errorcode) {         case positionerror.permission_denied:             title = 'permission_denied';             break;         case positionerror.position_unavailable:             title = 'position_unavailable';             break;         case positionerror.timeout:             title = 'timeout';             break;         default:             title: 'unknown_error';             break;     }      return title; } 

i add enums uses array in class use enum:

ext.define('myapp.util.cordovaplugins', {     uses: [         'myapp.enums.positionerror',         'myapp.enums.orientation'     ],      ... }); 

or in requires array of app.js make them globally:

ext.application({     name: 'myapp',      requires: [         'myapp.enums.*'     ],      ... });