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An unhandled exception occurred: ... Binding 'arguments' in strict mode

After upgrade to .63 I cannot build the project anymore due this exception:

Generating ES5 bundles for differential loading...

An unhandled exception occurred: C:\Proyectos\........-es2015.js: Binding 'arguments'


It may be related with the fix you put on version .59:

  • I287376,I311253,F156542 - Provided support for strict mode compilation.

below my package.json  file, so you can see all components and versions I am using:


Please help!!, this is urgent as I cannot deploy any new change, and I don't know any workaround


Note also that I have upgraded Js1 components

- from "ej-angular2": "^19.1.54"  to  "ej-angular2": "^19.1.63",

- from "syncfusion-javascript": "^19.1.54" to "syncfusion-javascript": "^19.1.63",


Note also that working on dev ( ng serve --hmr=true --port=5001 ) works ok.

The issue is related generating final js files.




"@angular/animations": "^8.2.14",
    "@angular/common": "^8.2.14",
    "@angular/compiler": "^8.2.14",
    "@angular/core": "^8.2.14",
    "@angular/forms": "^8.2.14",
    "@angular/platform-browser": "^8.2.14",
    "@angular/platform-browser-dynamic": "^8.2.14",
    "@angular/platform-server": "^8.2.14",
    "@angular/router": "^8.2.14",
    "@syncfusion/ej2-angular-buttons": "^19.1.63",
    "@syncfusion/ej2-angular-calendars": "^19.1.63",
    "@syncfusion/ej2-angular-charts": "^19.1.63",
    "@syncfusion/ej2-angular-dropdowns": "^19.1.63",
    "@syncfusion/ej2-angular-grids": "^19.1.63",
    "@syncfusion/ej2-angular-layouts": "^19.1.63",
    "@syncfusion/ej2-angular-navigations": "^19.1.63",
    "@syncfusion/ej2-angular-richtexteditor": "^19.1.63",
    "@syncfusion/ej2-angular-splitbuttons": "^19.1.63",
    "@syncfusion/ej2-dropdowns": "19.1.63",
    "@syncfusion/ej2-data": "^19.1.63",
    "aspnet-prerendering": "^3.0.1",
    "awesome-bootstrap-checkbox": "^1.0.1",
    "bootstrap": "^4.6.0",
    "cldr-data": "^36.0.0",
    "ej-angular2": "^19.1.63",
    "file-saver": "^2.0.5",
    "http-server": "^0.10.0",
    "ie-shim": "0.1.0",
    "jquery": "^3.6.0",
    "jquery-slimscroll": "^1.3.8",
    "moment": "^2.29.1",
    "ng-recaptcha": "^4.3.0",
    "ng-speed-test": "1.1.0",
    "ngx-bootstrap": "^5.6.2",
    "ngx-toastr": "^10.2.0",
    "popper.js": "^1.16.1",
    "rxjs": "^6.6.7",
    "syncfusion-javascript": "^19.1.63",
    "tslib": "^1.14.1",
    "web-animations-js": "^2.3.2",
    "webpack-hot-middleware": "^2.25.0",
    "webpack-merge": "^4.2.2",
    "zone.js": "~0.9.1"