TS1219 Experimental support for decorators is a feature that is subject to change in a future release


                                  Angular 2


When we compile the  angular 2 application , most of the time we got the following error like


Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.

As we know ,when we  run the Angular 2 application , the typescript compiler 'tsc' get called to execute the typescript(.ts) file. We configure the tsconfig.json file to configure the tsc compiler .

Generally the settings of the tsconfig.json file is

  {
  "compilerOptions": {
    "target": "es6",
    "module": "system",
    "moduleResolution": "node",
    "sourceMap": true,
    "removeComments": false,
    "noImplicitAny": false
  },
  "exclude": [
    "node_modules",
    "typings/main.d.ts",
    "typings/main"
  ]
}

Solutions :

So to fix the above issue we need to set the "experimentalDecorators" to "true" and finally the the configuration settings will be like this

{
  "compilerOptions": {
    "target": "es6",
    "module": "system",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  },
  "exclude": [
    "node_modules",
    "typings/main.d.ts",
    "typings/main"
  ]
}

Hope this will be helpful.



Please Please have some comments if it is helpful . Thanks in advance.


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