TypeError: Class constructor DefaultValueAccessor cannot be invoked without 'new'











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There are some Angular third part libraries that provide directives which internally extends the DefaultValueAccessor class.



When they are imported into projects that have their TypeScript compilation target set as es6, they stop working and throw the error:




TypeError: Class constructor DefaultValueAccessor cannot be invoked without 'new'




examples of different libraries affected by this issue:




  • https://github.com/anein/angular2-trim-directive/issues/28

  • https://github.com/khashayar/ng-trim-value-accessor/issues/12


A workaround would be copy pasting the source code of the library inside my own project (instead of importing the library as an npm dependency). However this is not nice nor very handy to do for obvious reasons.



How to properly solve this issue in the library?






angular typescript ecmascript-6 angular-directive controlvalueaccessor







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    up vote
    1
    down vote

    favorite












    There are some Angular third part libraries that provide directives which internally extends the DefaultValueAccessor class.



    When they are imported into projects that have their TypeScript compilation target set as es6, they stop working and throw the error:




    TypeError: Class constructor DefaultValueAccessor cannot be invoked without 'new'




    examples of different libraries affected by this issue:




    • https://github.com/anein/angular2-trim-directive/issues/28

    • https://github.com/khashayar/ng-trim-value-accessor/issues/12


    A workaround would be copy pasting the source code of the library inside my own project (instead of importing the library as an npm dependency). However this is not nice nor very handy to do for obvious reasons.



    How to properly solve this issue in the library?






    angular typescript ecmascript-6 angular-directive controlvalueaccessor







    share|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      There are some Angular third part libraries that provide directives which internally extends the DefaultValueAccessor class.



      When they are imported into projects that have their TypeScript compilation target set as es6, they stop working and throw the error:




      TypeError: Class constructor DefaultValueAccessor cannot be invoked without 'new'




      examples of different libraries affected by this issue:




      • https://github.com/anein/angular2-trim-directive/issues/28

      • https://github.com/khashayar/ng-trim-value-accessor/issues/12


      A workaround would be copy pasting the source code of the library inside my own project (instead of importing the library as an npm dependency). However this is not nice nor very handy to do for obvious reasons.



      How to properly solve this issue in the library?






      angular typescript ecmascript-6 angular-directive controlvalueaccessor







      share|improve this question













      There are some Angular third part libraries that provide directives which internally extends the DefaultValueAccessor class.



      When they are imported into projects that have their TypeScript compilation target set as es6, they stop working and throw the error:




      TypeError: Class constructor DefaultValueAccessor cannot be invoked without 'new'




      examples of different libraries affected by this issue:




      • https://github.com/anein/angular2-trim-directive/issues/28

      • https://github.com/khashayar/ng-trim-value-accessor/issues/12


      A workaround would be copy pasting the source code of the library inside my own project (instead of importing the library as an npm dependency). However this is not nice nor very handy to do for obvious reasons.



      How to properly solve this issue in the library?






      angular typescript ecmascript-6 angular-directive controlvalueaccessor




      angular typescript ecmascript-6 angular-directive controlvalueaccessor






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      asked 18 hours ago









      Shin

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