Property map does not exist on type Observable Response

Question

I am trying to call an API from Angular but am getting this error   Property  map  does not exist on type  Observable lt Response gt    The answers from this similar question didn t solve my issue  Angular 2 beta 17  Property   39 map  39  does not exist on type   39 Observable lt Response gt   39     I am using Angular 2 0 0-beta 17

User · Answer

Use the map function in pipe function and it will solve your problem   You can check the documentation here   this items   this afs collection  blalal   snapshotChanges   pipe map changes   gt      return changes map a   gt        const data   a payload doc data   as Items      data id   a payload doc id      return data

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I too faced the same error  One solution that worked for me was to add the following lines in your service ts file instead of import  rxjs add operator map    import   Observable   from  rxjs   import   map   from  rxjs operators     For an example  my app service ts after debugging was like   import   Injectable   from   angular core   import   HttpClient   from   angular common http   import   Observable   from  rxjs   import   map   from  rxjs operators     Injectable   export class AppService       constructor private http  HttpClient         getData    Observable lt any gt            return this http get  https   samples openweathermap org data 2 5 history city q Warren OH amp appid b6907d289e10d714a6e88b30761fae22            pipe map result   gt  result

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just install rxjs-compat by typing in terminal   npm install --save rxjs-compat   then import    import  rxjs Rx

User · Answer

I had the same issue with Angular 2 0 1 because I was importing Observable from  import   Observable   from  rxjs Observable     I resolve my problem on importing Observable from this path instead  import   Observable   from  rxjs

User · Answer

For the Angular 7v   Change  import  rxjs add operator map     To  import   map   from  rxjs operators      And    return this http get  http   localhost ionicapis public api products     pipe map res   gt  res json

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for all those linux users that are having this problem  check if the rxjs-compat folder is locked  I had this exact same issue and I went in terminal  used the sudo su to give permission to the whole rxjs-compat folder and it was fixed  Thats assuming you imported  import  rxjs add operator map   import  rxjs add operator catch      in the project ts file where the original  map error occurred

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import   Injectable   from   angular core     import   Http   from   angular http     import  rxjs add operator map       Injectable     providedIn   root         export class RestfulService      constructor public http  Http          access apis Get Request   getUsers      return this http get  http   jsonplaceholder typicode com users      map res   gt  res json               run the command    npm install rxjs-compat    I just import    import  rxjs add operator map     restart the vs code  issue solved

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In rxjs 6 map operator usage has been changed  now you need to Use it like this     import   map   from  rxjs operators   myObservable    pipe map data   gt  data   2      subscribe         For reference  https   www academind com learn javascript rxjs-6-what-changed  operators-update-path

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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    Or more generally   import  rxjs Rx       Notice  For versions of RxJS 6 x x and above  you will have to use pipeable operators as shown in the code snippet below   import   map   from  rxjs operators   import   HttpClient   from   angular common http           export class MyComponent     constructor private http  HttpClient        getItems         this http get  https   example com api items   pipe map data   gt       subscribe result   gt          console log result                   This is caused by the RxJS team removing support for using  See the breaking changes in RxJS  changelog for more info   From the changelog      operators  Pipeable operators must now be imported from rxjs like so  import   map  filter  switchMap   from  rxjs operators    No deep imports

User · Answer

If after importing import  rxjs add operator map  or import  rxjs Rx  too you are getting the same error then restart your visual studio code editor  the error will be resolved

User · Answer

In the latest Angular 7      you can try this simply as   import   Observable  of   from  rxjs   import   map  catchError   from  rxjs operators     And then you can use these methods as follows      private getHtml    Observable lt any gt        return this http get        assets test-data preview html   pipe        map  res  any    gt  res json           catchError  lt T gt  error  any  result   T    gt            console log error           return of result as T                         Check this demo for more details

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Thanks to https   github com nagamallabhanu https   github com webmaxru pwa-workshop-angular issues 2 issuecomment-395024755 encapsulating  pipe map         worked import   map   from  rxjs operators    courseRef  AngularFireList lt any gt   courses   Observable lt any   gt    this courseRef   db list   tags      this courses    this courseRef snapshotChanges      pipe map changes   gt          return changes map c   gt     key  c payload key     c payload val                  this courses  subscribe res  gt      console log res

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I had the same issue  I was using Visual studio 2015 which had an older version of typescript    After upgrading the extension the issue got resolved   Download Link

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Revisiting this because my solution isn t listed here   I am running Angular 6 with rxjs 6 0 and ran into this error   Here s what I did to fix it     I changed   map  response  any    gt  response json      to simply be    pipe map  response  any    gt  response json        I found the fix here    https   github com angular angular issues 15548 issuecomment-387009186

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In Angular v10 x and rxjs v6 x First import map top of my service  import  map  from  rxjs operators   Then I use map like this return this http get lt return type gt  URL     pipe map x   gt           here return your pattern     return x foo

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I am using Angular 5 2 and when I use import  rxjs Rx   it throws me the following lint error  TSLint  This import is blacklisted  import a submodule instead  import-blacklist   See the screenshot below    SOLUTION  Solved it by importing only the operators that I needed  Example follows   import  rxjs add operator map   import  rxjs add operator catch     So the fix would be to import specifically only the necessary operators

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First of all run installation as below   npm install --save rxjs-compat 6   Now you need to import rxjs in service ts   import  rxjs Rx      Voila  The problem has been fixed

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import   map   from  rxjs operators    getGetFunction    this http get  http   someapi    pipe map res   gt  res       getPostFunction yourPara   this http get  http   someapi  yourPara   pipe map res   gt  res        In above function you can see i didn t use res json   since im using HttpClient  It applies res json   automatically and returns Observable  HttpResponse  lt  string    You no longer need to call this function yourself after angular 4 in HttpClient

User · Answer

Simply install rxjs-compat to solve the problem  npm i rxjs-compat --save-dev   And import it like below  import  rxjs Rx

User · Answer

The angular new version does not support  map you have to install this through cmd npm install --save rxjs-compat via this you can enjoy with old technique   note  don t forget to import these lines   import   Observable  Subject   from  rxjs   import  rxjs add operator map   import  rxjs add operator catch

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npm install rxjs 6 rxjs-compat 6 --save

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simply run npm install --save rxjs-compat it fixes the error    It is recommended here

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Just write this command in the VS Code terminal of your project and restart the project  npm install rxjs-compat  You need to import the map operator by adding this  import  rxjs add operator map

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Angular 9   forkJoin     this http get   pipe      catchError  error    gt          return of                    this http get   pipe      catchError  error    gt          return of

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I tried all the possible answers posted above none of them worked      I resolved it by simply restarting my IDE i e   Visual Studio Code   May it helps someone

[angular] Property 'map' does not exist on type 'Observable<Response>'

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