Data path '''' should NOT have additional properties (es5BrowserSupport)

https://stackoverflow.com/questions/54288766/data-path-should-not-have-additional-properties-es5browsersupport

D:\Visnam\vtimviecweb>ng serve --ssl true

Schema validation failed with the following errors:

  Data path "" should NOT have additional properties(es5BrowserSupport).

(node:5140) ExperimentalWarning: The fs.promises API is experimental

es5BrowserSupport add additional polyfill

Solution 1

For option es5BrowserSupport your @angular/cli required minimum version 7.3 and @angular-devkit/build-angular required minimum version 0.13 .

1. Check your @angular/cli version. if is less than 7.3 then run following command

   ng update @angular/cli

2. Check your @angular-devkit/build-angular version. if is less than 0.13 then run following command

   ng update @angular-devkit/build-angular

Solution 2

Also you can edit angular.json file and find "es5BrowserSupport": true and comment it. It will also work without updating dependency