You can wrap `ng-content` in `ng-template` and use `ngTemplateOutlet`

    &lt;a class=&quot;bouton&quot; href=&quot;{{ href }}&quot; *ngIf=&quot;hasURL&quot;&gt;
        &lt;ng-container *ngTemplateOutlet=&quot;contentTpl&quot;&gt;&lt;/ng-container&gt;
    &lt;/a&gt;
    
    &lt;button class=&quot;bouton&quot; *ngIf=&quot;!hasURL&quot;&gt;
        &lt;ng-container *ngTemplateOutlet=&quot;contentTpl&quot;&gt;&lt;/ng-container&gt; 
    &lt;/button&gt;
    &lt;ng-template #contentTpl&gt;&lt;ng-content&gt;&lt;/ng-content&gt;&lt;/ng-template&gt;

**[Plunker Example][1]**

See also

- https://stackoverflow.com/questions/41593973/how-to-conditionally-wrap-a-div-around-ng-content

**[Angular 9 demo][2]**


  [1]: https://plnkr.co/edit/fQkEz2HQfOLZhhEkNr0Q?p=preview
  [2]: https://ng-run.com/edit/N7cnnC9HCm1cKlE88QFp

I used angular2 material `MdDialog` to show a form.

When user submits the form, a request is sent to the backend and if the request is successful, I need to close the dialog. If backend request failed, I need to keep the dialog open.

I can close the dialog by using a button like below.

    &lt;button md-raised-button md-dialog-close&gt;Cancel&lt;/button&gt;

But, in this case, I only need to close the dialog only if the backend request is successful, so I need a way to programmatically close the dialog.

The component which is shown inside the dialog doesn&#39;t have the dialog ref, and I don&#39;t know any other way to self close the dialog from the component.

Is there any way I an close the dialog from within the component inside the dialog?

Angular2 material dialog self close

I added the following line to my build.gradle(Module:app):

    compile &#39;com.android.support:design:25.4.0&#39; 

But when executing Gradle I&#39;m getting 

    Failed to resolve: com.android.support.design:25.4.0

I got that the support code from the android [support design library](https://developer.android.com/training/material/design-library.html#CreateFAB) and added it to a new project. I added it to the dependency section as such: 

    dependencies {
        compile fileTree(dir: &#39;libs&#39;, include: [&#39;*.jar&#39;])
        androidTestCompile(&#39;com.android.support.test.espresso:espresso-core:2.2.2&#39;, {
            exclude group: &#39;com.android.support&#39;, module: &#39;support-annotations&#39;
        })
        compile &#39;com.android.support:appcompat-v7:25.3.1&#39;
        compile &#39;com.android.support.constraint:constraint-layout:1.0.2&#39;
        testCompile &#39;junit:junit:4.12&#39;
    
        compile &#39;com.android.support:design:25.4.0&#39;
    }

Any ideas on what I&#39;m doing wrong?

Failed to resolve: com.android.support.design:25.4.0

I would like to display different template in my component. Only one will show.
If `hasURL` is `true`, I want to show the `&lt;a&gt;&lt;/a&gt;`.
If `hasURL` is `false`, I want to show the `&lt;button&gt;&lt;/button&gt;`.

The problem if hasURL is false, the component show button, but the ng-content is empty. Because it&#39;s already read in the first &quot;`a&gt;&lt;/a&gt;`

Is there a way to solve that please?

            &lt;a class=&quot;bouton&quot; href=&quot;{{ href }}&quot; *ngIf=&quot;hasURL&quot;&gt;
                &lt;ng-content&gt;
                &lt;/ng-content&gt;
            &lt;/a&gt;

            &lt;button class=&quot;bouton&quot; *ngIf=&quot;!hasURL&quot;&gt;
                &lt;ng-content&gt;
                &lt;/ng-content&gt;    
            &lt;/button&gt;



How to use multiple ng-content in the same component in Angular 2?

I would like to display different template in my component. Only one will show.
If <code>hasURL</code> is <code>true</code>, I want to show the <code>&#x3C;a>&#x3C;/a></code>.
If <code>hasURL</code> is <code>false</code>, I want to show the <code>&#x3C;button>&#x3C;/button></code>.
The problem if hasURL is false, the component show button, but the ng-content is empty. Because it's already read in the first "<code>a>&#x3C;/a></code>
Is there a way to solve that please?
<pre><code class="hljs language-php-template"> &#x3C;a class="bouton" href="{{ href }}" *ngIf="hasURL">
 &#x3C;ng-content>
 &#x3C;/ng-content>
 &#x3C;/a>

 &#x3C;button class="bouton" *ngIf="!hasURL">
 &#x3C;ng-content>
 &#x3C;/ng-content> 
 &#x3C;/button>
</code></pre>

I&#39;m trying to switch screens using both stack and tab navigator.

    const MainNavigation = StackNavigator({
          otp: { screen: OTPlogin },
          otpverify: { screen: OTPverification},
          userVerified: {
            screen: TabNavigator({
              List: { screen: List },
              Settings: { screen: Settings }
            }),
          },
        });

In this case stack navigator is used first and then tab navigator. I want to hide the headers from stack navigator. Which is not working properly when I use navigation options like::

    navigationOptions: { header: { visible: false } }

i&#39;m trying this code on first two components which are using in stacknavigator.
if i use this line then getting some error like:

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/DzbD0.png

Hide header in stack navigator React navigation

I made a browser action, but I just tried testing a page action. The button is put in the same place, but the page action button can&#39;t be clicked (the icon is greyed-out). I thought page action buttons were located on the address bar, not in the toolbar. Why is it located in the same place?

My browser action button:  
[![browser_action][1]][1]

My page action button:  
[![page_action][2]][2]


  [1]: https://i.stack.imgur.com/9dQc2.jpg
  [2]: https://i.stack.imgur.com/tUe8t.jpg

What are the differences between page action and browser action?

I&#39;m using fetch to get data json from an api. Works fine but I have to use it repeatedly for various calls, thus it needs to be synchronous or else I need some way to update the interface when the fetch completes for each component.

    function fetchOHLC(yUrl){
        fetch(yUrl)
        .then(response =&gt; response.json())
        .then(function(response) {
                    alert(JSON.stringify(response.query));
    
                var t = response.created;
                var o = response.open;
                var h = response.high;
                var l = response.low;
                var c = response.close;
            
            return {t,o,h,l,c};
        
        })
        .catch(function(error) {
            console.log(error);
        });    
    }
    
    var fetchData = fetchOHLC(yUrl);
    alert(fetchData); // empty ?

Is there any other way to achieve it other than using fetch? (I don&#39;t want to use jquery preferrably).

Thanks

**Edit**

The question is about fetch-api, not ajax, not jquery, so please stop marking it as duplicate of those questions without reading it properly.



How to make javascript fetch synchronous?

I have two inputs:
- First one on which I apply my custom validator
- Second one which value I use in my custom validator (it is dynamic and editable)

If I apply my custom validator on the first input, then I focus the second one and change the value - I want to force first inputs re-validation...

At the moment it only re-validates first input when I change the value... Any suggestions?

At the moment when I focus the first input I can access it&#39;s reference:

    &lt;input
        name=&quot;mEnd&quot;
        class=&quot;form-control&quot;
        [(ngModel)]=&quot;endDate&quot;
           ...
        #endDateInput=&quot;ngModel&quot;
        (focus)=&quot;clog(endDateInput)&quot;
    &gt;

I wonder can I trigger re-validation using the input formControl reference methods?

How to trigger Angular 2 input validation manually?

I&#39;m trying to write a simple test for a simple React component, and I want to use Jest to confirm that a function has been called when I simulate a click with enzyme. According to the Jest docs, I should be able to use `spyOn` to do this: [spyOn](http://facebook.github.io/jest/docs/jest-object.html#jestspyonobject-methodname).

However, when I try this, I keep getting `TypeError: Cannot read property &#39;_isMockFunction&#39; of undefined` which I take to mean that my spy is undefined. My code looks like this:

    import React, { Component } from &#39;react&#39;;
    import logo from &#39;./logo.svg&#39;;
    import &#39;./App.css&#39;;
    class App extends Component {
    
      myClickFunc = () =&gt; {
          console.log(&#39;clickity clickcty&#39;)
      }
      render() {
        return (
          &lt;div className=&quot;App&quot;&gt;
            &lt;div className=&quot;App-header&quot;&gt;
              &lt;img src={logo} className=&quot;App-logo&quot; alt=&quot;logo&quot; /&gt;
              &lt;h2&gt;Welcome to React&lt;/h2&gt;
            &lt;/div&gt;
            &lt;p className=&quot;App-intro&quot; onClick={this.myClickFunc}&gt;
              To get started, edit &lt;code&gt;src/App.js&lt;/code&gt; and save to reload.
            &lt;/p&gt;
          &lt;/div&gt;
        );
      }
    }
    
    export default App;


and in my test file:

    import React from &#39;react&#39;;
    import ReactDOM from &#39;react-dom&#39;;
    import App from &#39;./App&#39;;
    import { shallow, mount, render } from &#39;enzyme&#39;

    describe(&#39;my sweet test&#39;, () =&gt; {
     it(&#39;clicks it&#39;, () =&gt; {
        const spy = jest.spyOn(App, &#39;myClickFunc&#39;)
        const app = shallow(&lt;App /&gt;)
        const p = app.find(&#39;.App-intro&#39;)
        p.simulate(&#39;click&#39;)
        expect(spy).toHaveBeenCalled()
     })
    })

Anyone have an insight into what I&#39;m doing wrong?

Jest spyOn function called

I have a custom form control component in my Angular application, which implements `ControlValueAccessor` interface.

However, I want to access the `FormControl` instance, associated with my component. I&#39;m using reactive forms with `FormBuilder` and providing form control using `formControlName` attribute.

**SO, how do I access `FormControl` instance from inside of my custom form component?**

Get access to FormControl from the custom form component in Angular

I&#39;m using angular 2.4.9 for my application development so I need to use specific version of ng cli instead of the latest one.

I know the below command will install latest version of ng cli

    npm install -g @angular/cli

But how can I install specific version of ng cli?

Install specific version of ng cli

**note:** I&#39;m new to Angular, so please excuse any new comer stupidity here.

**Details**

 - I&#39;ve installed the latest version of Angular CLI
 - The default app loads and runs perfectly fine after &#39;ng serve&#39;

**Issue**

 - I decided to create a new module an import it into the app module 
 - This is something I&#39;ve done a couple of times in Angular 2 and it&#39;s worked perfectly fine
 - However, since I ran the latest version of Angular CLI this morning, importing a module breaks and I receive the following error:

&gt; compiler.es5.js:1689 Uncaught Error: Unexpected directive &#39;ProjectsListComponent&#39; imported by the module &#39;ProjectsModule&#39;. Please add a @NgModule annotation.


**App Module**

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-js --&gt;

    import { BrowserModule } from &#39;@angular/platform-browser&#39;;
    import { NgModule } from &#39;@angular/core&#39;;
    import { AppComponent } from &#39;./app.component&#39;;
    import { AngularFireModule } from &#39;angularfire2&#39;;
    import { AngularFireDatabaseModule } from &#39;angularfire2/database&#39;;
    import { AngularFireAuthModule } from &#39;angularfire2/auth&#39;;
    import { environment } from &#39;../environments/environment&#39;;
    import { ProjectsModule } from &#39;./projects/projects.module&#39;;
    import { HttpModule } from &#39;@angular/http&#39;;


    @NgModule({
      imports: [
        BrowserModule,
        HttpModule,
        ProjectsModule,
        AngularFireModule.initializeApp(environment.firebase, &#39;AngularFireTestOne&#39;), // imports firebase/app needed for everything
        AngularFireDatabaseModule, // imports firebase/database, only needed for database features
        AngularFireAuthModule // imports firebase/auth, only needed for auth features
      ],

      declarations: [AppComponent],

      bootstrap: [AppComponent]

    })

    export class AppModule { }

&lt;!-- end snippet --&gt;

**Projects Module**

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-js --&gt;

    import { BrowserModule } from &#39;@angular/platform-browser&#39;;
    import { NgModule } from &#39;@angular/core&#39;;
    import { ProjectsListComponent } from &#39;./projects-list.component&#39;;
    import { RouterModule } from &#39;@angular/router&#39;;

    @NgModule({

        declarations: [
            ProjectsListComponent
        ],


      imports: [
        BrowserModule,
        ProjectsListComponent,
        RouterModule.forChild([
          { path: &#39;projects&#39;, component: ProjectsListComponent }
        ])
      ]
    })

    export class ProjectsModule { }

&lt;!-- end snippet --&gt;

The process I&#39;ve taken to setting the module up hasn&#39;t been any different to when I was using Angular 2. However, after having issues with compatibility between Angular Cli, firebase and angular fire, I decided to get the latest of everything this morning.

Any help with this one would be massssssively appreciated as I&#39;ve hit a brick wall with my understanding of it all.

Thank you.

Angular CLI - Please add a @NgModule annotation when using latest

I have a condition in the template as follows:


    &lt;ng-container&gt;
        &lt;p *ngFor=&quot;let seat of InfoDetails?.seatInfo&quot;&gt;
            &lt;template *ngIf=&quot;seat.section&quot;&gt;
                Section {{seat?.section}} ,
            &lt;/template&gt;
            &lt;template *ngIf=&quot;seat.row&quot;&gt;
                Row {{seat?.row}},
            &lt;/template&gt;
            &lt;template *ngIf=&quot;seat.seatNo&quot;&gt;
                Seat number {{seat?.seatNo}}
            &lt;/template&gt;
        &lt;/p&gt;
    &lt;/ng-container&gt;

I have dataset that contains `row` and `seatNo`, but it does not seem to print in the template. what is the issue here?

why *ngIf doesnt&#39;work with ng-template?

What is the difference in Angular 2 between the following snippets:

&lt;!-- language: html --&gt;
    &lt;div [class.extra-sparkle]=&quot;isDelightful&quot;&gt;
    &lt;div [ngClass]=&quot;{&#39;extra-sparkle&#39;: isDelightful}&quot;&gt;
    


Content Type	Original Author	Original Content on Stackoverflow
Question	Steffi	View Question on Stackoverflow
Solution 1 - Javascript	yurzui	View Answer on Stackoverflow

How to use multiple ng-content in the same component in Angular 2?

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Failed to resolve: com.android.support.design:25.4.0

Angular2 material dialog self close

Attributions