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 .
Check your
@angular/cliversion. if is less than7.3then run following commandng update @angular/cliCheck your
@angular-devkit/build-angularversion. if is less than0.13then run following commandng 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
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