The selector “my-app” did not match any elements

Question

The problem is when I run my app, it works fine. But when I refresh it, most of the time I get below msg.

The selector \"my-app\" did not match any e

Answer 1

This happened to me when I changed the bootstrap component from AppComponent to a new component. When you change it you need to change it in the main index.html as well. index.html should contain the bootstrap component.

For example, if you change the app-component to app-login in app.module.ts in the bootstrap section then you should update your index.html like this