javascript - Why do all components with Component selectors have to be used in an Angular 2 application? -

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please aware working tutorial code here, not strictly correct, works. of time.

i have component class decorated follows:

@component({     selector: "click-here",     template: `         <button (click) = "onclickthere($event)">click here!</button>         {{clickmessage}}     ` })

and used this:

<body>     <click-here>loading...</click-here> </body>

then added new component class, decorator has:

selector: "type-here"

when run application npm start, legion of errors in browser, starting with:

the selector "click-here" did not match elements

why every selector have match element? working not feasible; there must way able have multiple component decorators, different selector values, , use of them. how achieve that? doing wrong tutorial hasn't included correct version of? must each component have name or something?

this relevant element instantiate bootstrap(mycomponent).

if bootstrap component , doesn't match selector, angular doesn't know should place it. angular uses selector find place insert component dom.

this means can bootstrap 1 component once inside page. there plans support overriding selector when component passed bootstrap() isn't supported.

see https://github.com/angular/angular/issues/7136

for components used inside mycomponent doesn't matter. can have many components want , use need.


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