Angular 2 beta 17 Property map does not exist on type Observable Response

Question

I just upgraded from Angular 2 beta16 to beta17  which in turn requires rxjs 5 0 0-beta 6   Changelog here  https   github com angular angular blob master CHANGELOG md 200-beta17-2016-04-28   In beta16 all was working well regarding Observable map functionality  The following errors appeared after I upgraded and occur when typescript attempts to transpile         Property  map  does not exist on type  Observable   anywhere where I ve used map with an observable    c  path node modules rxjs add operator map d ts 2 16   error TS2435  Ambient modules cannot be nested in other modules or namespaces    c  path node modules rxjs add operator map d ts 2 16   error TS2436  Ambient module declaration cannot specify a relative module name       I have seen this question answer but it does not solve the problem   Observable errors with Angular2 beta 12 and RxJs 5 beta 3  My appBoot ts looks like this  am already referencing rxjs map         lt reference path       node modules angular2 typings browser d ts   gt  import  bootstrap  from  angular2 platform browser   import  ROUTER PROVIDERS  from  angular2 router   import  HTTP PROVIDERS  from  angular2 http    stuff  import  rxjs add operator map   import  rxjs add operator toPromise   import  enableProdMode  from  angular2 core   import   Title   from  angular2 platform browser       enableProdMode    bootstrap AppDesktopComponent        ROUTER PROVIDERS      HTTP PROVIDERS      Title       Does anybody have any idea what is going haywire

User · Answer

UPDATE Sep 29 2016 for Angular 2 0 Final  amp  VS 2015  The workaround is no longer needed  to fix you just need to install TypeScript version 2 0 3   Fix taken from the edit on this github issue comment

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In my case it wouldn t enough to include only map and promise   import  rxjs add operator map   import  rxjs add operator toPromise     I solved this problem by importing several rxjs components as official documentation recommends   1  Import statements in one app rxjs-operators ts file      import  rxjs Rx      adds ALL RxJS statics  amp  operators to Observable     See node module rxjs Rxjs js    Import just the rxjs statics and operators we need for THIS app      Statics import  rxjs add observable throw       Operators import  rxjs add operator catch   import  rxjs add operator debounceTime   import  rxjs add operator distinctUntilChanged   import  rxjs add operator map   import  rxjs add operator switchMap   import  rxjs add operator toPromise     2  Import rxjs-operator itself in your service      Add the RxJS Observable operators we need in this app  import    rxjs-operators

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You need to import the map operator   import  rxjs add operator map

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As I understand it is because of rxjs last update  They have changed some operators and syntax  Thereafter we should import rx operators like this   import   map   from  rxjs operators    instead of this   import  rxjs add operator map     And we need to add pipe around all operators like this   this myObservable   pipe map data   gt        Source is here

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As Justin Scofield has suggested in his answer  for Angular 5 s latest release and for Angular 6  as on 1st June  2018  just import  rxjs add operator map   isn t sufficient to remove the TS error   ts  Property  map  does not exist on type  Observable lt Object gt     Its necessary to run the below command to install the required dependencies  npm install rxjs 6 rxjs-compat 6 --save after which the map import dependency error gets resolved

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THE FINAL ANSWER FOR THOSE WHO USES ANGULAR 6   Add the below command in your   service ts file   import   map   from  rxjs operators                                                  Example  Below                                       getPosts    this http get  http   jsonplaceholder typicode com posts    pipe map res   gt  res json            I am using  windows 10   angular6 with typescript V 2 3 4 0

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In Angular 2x  In example component ts  import   Observable   from  rxjs     In example component html    Observable interval 2000  map valor   gt   Async value      In Angular 5x or Angular 6x   In example component ts  import   Observable  interval  pipe   from  rxjs   import  switchMap  map  from  rxjs operators     In example component html  valorAsync   interval 2500  pipe map valor   gt   Async value

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I upgraded my gulp-typescript plugin to the latest version  2 13 0  and now it compiles without hitch   UPDATE 1   I was previously using gulp-typescript version 2 12 0  UPDATE 2   If you are upgrading to the Angular 2 0 0-rc 1  you need to do the following in your appBoot ts file       lt reference path       typings browser ambient es6-shim index d ts   gt  import   bootstrap   from   angular platform-browser-dynamic   import   ROUTER PROVIDERS   from   angular router-deprecated   import   HTTP PROVIDERS   from   angular http   import   AppComponent   from    path AppComponent   import  rxjs add operator map   import  rxjs add operator toPromise      import  rxjs Rx   this will load all features import   enableProdMode   from   angular core   import   Title   from   angular platform-browser        enableProdMode    bootstrap AppComponent        ROUTER PROVIDERS      HTTP PROVIDERS      Title       The important thing being the reference to es6-shim index d ts  This assumes you have installed the es6-shim typings as shown here    More on the typings install from Angular here   https   angular io docs ts latest guide typescript-configuration html   typings

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I was facing the similar error  It was solved when I did these three things    Update to the latest rxjs   npm install rxjs 6 rxjs-compat 6 --save  Import map and promise   import  rxjs add operator map   import  rxjs add operator toPromise    Added a new import statement   import   Observable  Subject  asapScheduler  pipe  of  from  interval  merge  fromEvent   from  rxjs

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Similar error messages will pop up when transitioning from version 5 to 6  Here is an answer for the change to rxjs-6   Import the individual operators  then use pipe instead of chaining   import   map  delay  catchError   from  rxjs operators     source pipe    map x   gt  x   x     delay 4000     catchError err   gt  of  error found       subscribe printResult

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It looks like latest RxJS requires typescript 1 8 so typescript 1 7 reports the above error   I solved this issue by upgrading to the latest typescript version

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import  rxjs add operator map      amp   npm install rxjs 6 rxjs-compat 6 --save   worked for me

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property  map  does not exist on type  observable response   angular 6  Solution   Update Angular CLI And Core Version   ng update  angular cli             Update Angular CLi  ng update  angular core            Update Angular Core  npm install --save rxjs-compat     For Map Call For Post Method

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If you are using angular4 the use below import  it should work    import  rxjs add operator map    If you are using angular5 6 then use map with pipe and import below one  import   map   from  rxjs operators

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Rxjs 5 5     Property    map    does not exist on type Observable   The problem was related to the fact that you need to add pipe around all operators   Change this   this myObservable   map data   gt        to this  this myObservable   pipe map data   gt         And  Import map like this   import   map   from  rxjs operators     It will solve your issues

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If you happen to see this error in VS2015  there s a github issue  amp  workaround mentioned here   https   github com Microsoft TypeScript issues 8518 issuecomment-229506507  This did help me resolve the property map does not exist on observable issue  Besides  make sure you have typescript version above 1 8 2

[typescript] Angular 2 beta.17: Property 'map' does not exist on type 'Observable<Response>'

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