ReferenceError: ngDevMode is not defined #31595
Description
🐞 bug report
Affected Package
The issue is caused by package @angular/core
Is this a regression?
Not sureDescription
A clear and concise description of the problem...If there are compilation errors in a template (while using "ng serve"), I am seeing the error "ReferenceError: ngDevMode is not defined" when running in Firefox (60.6.1esr) or Edge. Chrome shows the actual compilation errors.
🔬 Minimal Reproduction
https://stackblitz.com/...Create simple app with a component. Introduce compilation errors. Try to run app in browser.
The error (with Angular 8.1.1 is in core.js:13393
🔥 Exception or Error
ReferenceError: ngDevMode is not defined
🌍 Your Environment
Angular Version: 8.1.1 (also 8.1.0)
Anything else relevant?