hello-component | An example of creating a component | Frontend Framework library
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kandi X-RAY | hello-component Summary
An example of creating a component with each major JavaScript framework. For a live demo you can preview
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QUESTION
I'm reading the ebook Rails, Angular, Postgres, and Bootstrap, Second Edition. I'm really learning a lot. The books it's from 2017, but I'm trying to create the project with all the frameworks updated. I want the hard way. hehehe
So I'm using Rails 6 and Angular 8. I got stuck when I tried to to create a component for angular inside the webpack. How?
I will only describe the steps that I think that it's necessary, so that's what I did:
I create the rails project with:
...ANSWER
Answered 2019-Oct-11 at 19:33I think you need to add the HelloComponent
also to the bootstrap
array.
QUESTION
This one is a very basic example showing a highcharts picture with angular 7. Instead of passing the values directly to the data[] object from options, I want to do it through a value declared in app.component, using @input decorator in hello-component. But running ng serve i am getting "Cannot read property 'direct' of undefined" error. Some help, please? Thank you very much!
app.component.ts
...ANSWER
Answered 2019-Aug-24 at 16:03This is because of Angular life cycle methods, you normally want to assign values OnInit
(when component template has been initialized). It also makes sense to render element only when value has been initialized. So to correct this, you'd need to change your code to:
QUESTION
HelloComponent
gets a SampleService
instance, defining a Service Provider.
When HelloCompoment
is destroyed, I don't understand why SampleService
survives.
If HelloComponent
got a SampleService
instance by type (avoiding ServiceProvider
), no problem occurs.
sample-service.ts
...ANSWER
Answered 2019-Apr-08 at 17:45This is a known issue in Angular, but one that is (unfortunately) by design.
The presence of an OnDestroy
callback hook is checked at compile time and since your ServiceProvider
is wrapping a Factory which creates a SampleService
, the Angular compiler unfortunately has no idea that this hook even exists, so it will never be called.
QUESTION
Here is what Angular guide says about style scope and inheritance:
The styles specified in @Component metadata apply only within the template of that component. They are not inherited by any components nested within the template nor by any content projected into the component
And if style propagation down the nesting-tree is desired, users are advised to explicitly
...Use the /deep/ shadow-piercing descendant combinator to force a style down through the child component tree into all the child component views.
ANSWER
Answered 2018-Sep-30 at 14:11In your example, it's just basic CSS inheritance: you say that the div's color is red, and you don't explicitly specify any other color for that div's child elements. So of course your child component is going to have red text; it's just CSS' normal behaviour.
Now say you add a h1
to your parent element and add a rule to change its color to green.
QUESTION
Playing around with the stackblitz starting point and I added the following routing:
...ANSWER
Answered 2018-May-27 at 15:41Firstly, amend your route definition to allow a path parameter, like so:
QUESTION
When switching from params
to paramMap
in this stackblitz hello component routing example the routing no longer displays the correct result in the router outlet.
I changed the original ngOnInit
code in hello-component.ts
to this:
ANSWER
Answered 2018-May-27 at 06:24Parammap returns a map and not an object so you have to change your code to like this
this.name = params.get('name')
to get name param from the map.
Check updated code here
Check this link for more information on how to use paramMap https://angular.io/api/router/ParamMap
QUESTION
I'm trying to display a spinner within a button as soon as a certain observable starts and hide it again as soon as it ends.
After hours of researching I'm kinda lost how I could achieve it (I know there are several posts here but none of it seems to help and even the often mentioned angular-2-busy or one of it's forks doesn't really work)
So there workflow would be
I have a directive/component to which I can provide an Observable via @Input. The directive should then show the spinner as soon as the Observable starts (or I can just use the click event). and it should hide the spinner again when the Subscription completes.
Note: the examples below are simplified (no spinner etc. involved) but show exactly what the problem is.
...ANSWER
Answered 2018-May-23 at 13:56Not entirely sure about how you want to do this, but I extended your Stackbiltz with a solution here.
Main part is this:
QUESTION
I have a simple project that uses ui-router with component. For the 'hello' component, nothing happened if I clicked on the 'hello' link; if I clicked on the "About" link, then it showed the view because it doesn't use a component. Can someone please let me know why the 'hello' component is not working? I have tried different version of angular-ui-router.js, but didn't fix the issue. Thanks.
index.html:
...ANSWER
Answered 2017-Feb-22 at 19:26You should load the module first and then the component, change the order as,
QUESTION
Im trying to use Kendoui Angular2 grid within component in Kendo dialog. When I try to pagging- click on pagging buttons, It doesnt work and Im "thrown" to home page. Does anyone know if this should work in some way?
code:
...ANSWER
Answered 2017-Jan-05 at 15:33It seems to work when tested locally. The Dialog will render custom component 'hello-grid':
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