TypeError: dart.global.firebase.firestore is not a function How to resolve it.?

[Dinesh130914]

TypeError: dart.global.firebase.firestore is not a function at Object.firestore$ [as firestore] (http://localhost:57305/packages/firebase/src/top_level.dart.lib.js:99:55) at new cloud_firestore_web.FirestoreWeb.new (http://localhost:57305/packages/cloud_firestore_web/src/write_batch_web.dart.lib.js:806:37) at Function.registerWith (http://localhost:57305/packages/cloud_firestore_web/src/write_batch_web.dart.lib.js:751:71) at Object.registerPlugins (http://localhost:57305/packages/Medcell/generated_plugin_registrant.dart.lib.js:19:38) at main (http://localhost:57305/web_entrypoint.dart.lib.js:34:35) at main.next () at runBody (http://localhost:57305/dart_sdk.js:39819:34) at Object._async [as async] (http://localhost:57305/dart_sdk.js:39850:7) at main$ (http://localhost:57305/web_entrypoint.dart.lib.js:33:18) at http://localhost:57305/main_module.bootstrap.js:19:10 at Array.forEach () at window.$dartRunMain (http://localhost:57305/main_module.bootstrap.js:18:32) at :1:8 at Object.runMain (http://localhost:57305/dwds/src/injected/client.js:9024:21) at http://localhost:57305/dwds/src/injected/client.js:23836:19 at _wrapJsFunctionForAsync_closure.$protected (http://localhost:57305/dwds/src/injected/client.js:3915:15) at _wrapJsFunctionForAsync_closure.call$2 (http://localhost:57305/dwds/src/injected/client.js:11461:12) at Object._asyncStartSync (http://localhost:57305/dwds/src/injected/client.js:3879:20) at mainclosure3.$call$body$mainclosure (http://localhost:57305/dwds/src/injected/client.js:23848:16) at main__closure3.call$1 (http://localhost:57305/dwds/src/injected/client.js:23775:19) at StaticClosure._rootRunUnary [as call$2$5] (http://localhost:57305/dwds/src/injected/client.js:4273:18) at _CustomZone.runUnary$2$2 (http://localhost:57305/dwds/src/injected/client.js:12833:39) at _CustomZone.runUnaryGuarded$1$2 (http://localhost:57305/dwds/src/injected/client.js:12776:14) at _ForwardingStreamSubscription._sendData$1 (http://localhost:57305/dwds/src/injected/client.js:12373:19) at _ForwardingStreamSubscription._add$1 (http://localhost:57305/dwds/src/injected/client.js:12319:15) at _ForwardingStreamSubscription._add$1 (http://localhost:57305/dwds/src/injected/client.js:12666:12) at _MapStream._handleData$2 (http://localhost:57305/dwds/src/injected/client.js:12727:12) at _ForwardingStreamSubscription._handleData$1 (http://localhost:57305/dwds/src/injected/client.js:12692:20) at Object.eval (eval at Closure_forwardCallTo (http://localhost:57305/dwds/src/injected/client.js:1427:14), :3:40) at StaticClosure._rootRunUnary [as call$2$5] (http://localhost:57305/dwds/src/injected/client.js:4273:18) at _CustomZone.runUnary$2$2 (http://localhost:57305/dwds/src/injected/client.js:12833:39) at _CustomZone.runUnaryGuarded$1$2 (http://localhost:57305/dwds/src/injected/client.js:12776:14) at _ControllerSubscription._sendData$1 (http://localhost:57305/dwds/src/injected/client.js:12373:19) at _ControllerSubscription._add$1 (http://localhost:57305/dwds/src/injected/client.js:12319:15) at _SyncStreamController._sendData$1 (http://localhost:57305/dwds/src/injected/client.js:12158:32) at _SyncStreamController.add$1 (http://localhost:57305/dwds/src/injected/client.js:12037:15) at Object.eval (eval at Closure_forwardInterceptedCallTo (http://localhost:57305/dwds/src/injected/client.js:1510:14), :3:38) at StaticClosure._rootRunUnary [as call$2$5] (http://localhost:57305/dwds/src/injected/client.js:4273:18) at _CustomZone.runUnary$2$2 (http://localhost:57305/dwds/src/injected/client.js:12833:39) at _CustomZone.runUnaryGuarded$1$2 (http://localhost:57305/dwds/src/injected/client.js:12776:14) at _ControllerSubscription._sendData$1 (http://localhost:57305/dwds/src/injected/client.js:12373:19) at _ControllerSubscription._add$1 (http://localhost:57305/dwds/src/injected/client.js:12319:15) at _SyncStreamController._sendData$1 (http://localhost:57305/dwds/src/injected/client.js:12158:32) at _SyncStreamController.add$1 (http://localhost:57305/dwds/src/injected/client.js:12037:15) at _GuaranteeSink.add$1 (http://localhost:57305/dwds/src/injected/client.js:23277:25) at HtmlWebSocketChannel_closure1.call$1 (http://localhost:57305/dwds/src/injected/client.js:23570:61) at _EventStreamSubscription_closure.call$1 (http://localhost:57305/dwds/src/injected/client.js:17887:26) at StaticClosure._rootRunUnary [as call$2$5] (http://localhost:57305/dwds/src/injected/client.js:4279:16) at _CustomZone.runUnary$2$2 (http://localhost:57305/dwds/src/injected/client.js:12833:39) at _CustomZone.runUnaryGuarded$1$2 (http://localhost:57305/dwds/src/injected/client.js:12776:14) at _CustomZone_bindUnaryCallbackGuarded_closure.call$1 (http://localhost:57305/dwds/src/injected/client.js:12969:25) at invokeClosure (http://localhost:57305/dwds/src/injected/client.js:1260:26) at WebSocket. (http://localhost:57305/dwds/src/injected/client.js:1279:18)

[kevmoo]

Guessing you are not including the required JS library in your html