Mandatory property of @Component() decorator function?

Question

I know @Component() decorator functions accepts a lot of properties like template, templateUrl, input, output, styles, styleUrl etc. Out of all propety which property is mandatory for a component?

Mahesh Verma · Answer

Hi Reena, "selector" and "template/templateUrl" are the two mandatory property according to my point of view, because without selector how can you call this component? And if you can define selector then you should define a View (i.e. template or templateUrl) for that, i.e. why Component is called "Directive with templates". You can also refer to this : https://www.youtube.com/watch?v=2aI3piboaV4&t=7s It will enhance your knowledge in respect to directives.

Mahesh Verma · Answer

Hi Reena, Then what is the use of empty @Component() function? Why we used this? However, it cannot generate any error if its empty. Sorry to say this, but you can also try this, just create a test page on your existing angular project and do the same thing, you will get the proper error also, so, that you will rectify these problems in future.

Reena Lakra · Answer

Thanks Mahesh Sir, but what if I will not use any one of the property? It will generate any kind of error?

Mandatory property of @Component() decorator function?

Answers (3)