If you want to only trigger validation when the input looses focus you can use [onBlur][1].

&gt;React uses onFocus and onBlur instead of onFocusIn and onFocusOut. All React events are normalized to bubble, so onFocusIn and onFocusOut are not needed/supported by React. [2]


  [1]: https://facebook.github.io/react/docs/events.html#focus-events
  [2]: https://github.com/facebook/react/blob/9198a5cec0936a21a5ba194a22fcbac03eba5d1d/packages/react-dom/src/shared/ReactDOMUnknownPropertyHook.js#L36

Its late, yet it&#39;s worth your time nothing that, there are some differences in browser level implementation of focusin and focusout events and react synthetic onFocus and onBlur. focusin and focusout actually bubble, while onFocus and onBlur dont. So there is no exact same implementation for focusin and focusout as of now for react. Anyway most cases will be covered in onFocus and onBlur.

You&#39;d need to be careful as `onBlur` has some caveats in IE11 (https://stackoverflow.com/questions/41298948/how-to-use-relatedtarget-or-equivalent-in-ie, https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/relatedTarget).

There is, however, no way to use `onFocusOut` in React as far as I can tell. See the issue on their github https://github.com/facebook/react/issues/6410 if you need more information. (see below for an update on this)

UPDATE:

As of React 17, the events have been updated - see [PR for use focusin/focusout for onFocus/onBlur][1].
However as [the page listing breaking changes][2] mentions:
&gt; Although React 17 switched from focus to focusin under the hood for the onFocus event, note that this has not affected the bubbling behavior. In React, onFocus event has always bubbled, and it continues to do so in React 17 because generally it is a more useful default. See this sandbox for the different checks you can add for different particular use cases.


  [1]: https://github.com/facebook/react/pull/19186
  [2]: https://reactjs.org/blog/2020/08/10/react-v17-rc.html#other-breaking-changes

JavaScript =&gt; React

onfocusout =&gt; onBlur

onfocusin =&gt; onFocus

My project has Spring Security. 
Main issue: Not able to access swagger URL at http://localhost:8080/api/v2/api-docs. It says Missing or invalid Authorization header.

[Screenshot of the browser window][1]
My pom.xml has the following entries

    &lt;dependency&gt;
        &lt;groupId&gt;io.springfox&lt;/groupId&gt;
        &lt;artifactId&gt;springfox-swagger2&lt;/artifactId&gt;
        &lt;version&gt;2.4.0&lt;/version&gt;
    &lt;/dependency&gt;

    &lt;dependency&gt;
        &lt;groupId&gt;io.springfox&lt;/groupId&gt;
        &lt;artifactId&gt;springfox-swagger-ui&lt;/artifactId&gt;
        &lt;version&gt;2.4.0&lt;/version&gt;
    &lt;/dependency&gt;

SwaggerConfig :

    @Configuration
    @EnableSwagger2
    public class SwaggerConfig {
	
	@Bean
    public Docket api() {
        return new Docket(DocumentationType.SWAGGER_2).select()
        		.apis(RequestHandlerSelectors.any())
        		.paths(PathSelectors.any())
        		.build()
        		.apiInfo(apiInfo());
    }

    private ApiInfo apiInfo() {
        ApiInfo apiInfo = new ApiInfo(&quot;My REST API&quot;, &quot;Some custom description of API.&quot;, &quot;API TOS&quot;, &quot;Terms of service&quot;, &quot;myeaddress@company.com&quot;, &quot;License of API&quot;, &quot;API license URL&quot;);
        return apiInfo;
    }

AppConfig:

    @Configuration
    @EnableWebMvc
    @ComponentScan(basePackages = { &quot;com.musigma.esp2&quot; })
    @Import(SwaggerConfig.class)
    public class AppConfig extends WebMvcConfigurerAdapter {

    // ========= Overrides ===========

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LocaleChangeInterceptor());
    }
    
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler(&quot;swagger-ui.html&quot;)
          .addResourceLocations(&quot;classpath:/META-INF/resources/&quot;);
     
        registry.addResourceHandler(&quot;/webjars/**&quot;)
          .addResourceLocations(&quot;classpath:/META-INF/resources/webjars/&quot;);
    }

web.xml entries:

    &lt;context-param&gt;
		&lt;param-name&gt;contextConfigLocation&lt;/param-name&gt;
		&lt;param-value&gt;
			com.musigma.esp2.configuration.AppConfig
			com.musigma.esp2.configuration.WebSecurityConfiguration
			com.musigma.esp2.configuration.PersistenceConfig
			com.musigma.esp2.configuration.ACLConfig
			com.musigma.esp2.configuration.SwaggerConfig
		&lt;/param-value&gt;
	&lt;/context-param&gt;

WebSecurityConfig:

    @Configuration
    @EnableWebSecurity
    @EnableGlobalMethodSecurity(prePostEnabled = true)
    @ComponentScan(basePackages = { &quot;com.musigma.esp2.service&quot;, &quot;com.musigma.esp2.security&quot; })
    public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
    @Override
    	protected void configure(HttpSecurity httpSecurity) throws Exception {
    		httpSecurity
    		.csrf()
    			.disable()
    		.exceptionHandling()
    			.authenticationEntryPoint(this.unauthorizedHandler)
    			.and()
    		.sessionManagement()
    			.sessionCreationPolicy(SessionCreationPolicy.STATELESS)
    			.and()
    		.authorizeRequests()
    			.antMatchers(&quot;/auth/login&quot;, &quot;/auth/logout&quot;).permitAll()
    			.antMatchers(&quot;/api/**&quot;).authenticated()
    			.anyRequest().authenticated();
    
    		// custom JSON based authentication by POST of {&quot;username&quot;:&quot;&lt;name&gt;&quot;,&quot;password&quot;:&quot;&lt;password&gt;&quot;} which sets the token header upon authentication
    		httpSecurity.addFilterBefore(loginFilter(), UsernamePasswordAuthenticationFilter.class);
    
    		// custom Token based authentication based on the header previously given to the client
    		httpSecurity.addFilterBefore(new StatelessTokenAuthenticationFilter(tokenAuthenticationService), UsernamePasswordAuthenticationFilter.class);
    	}
    }

  [1]: http://i.stack.imgur.com/z8Hl1.png

How to configure Spring Security to allow Swagger URL to be accessed without authentication

I was using Docker in the old way, with a volume container:

    docker run -d --name jenkins-data jenkins:tag echo &quot;data-only container for Jenkins&quot;

But now I changed to the new way by creating a named volume:

     docker volume create --name my-jenkins-volume 

I bound this new volume to a new Jenkins container.
The only thing I&#39;ve left is a folder in which I have the `/var/jenkins_home` of my previous jenkins container. (by using `docker cp`)
Now I want to fill my new named volume with the content of that folder.

Can I just copy the content of that folder to `/var/lib/jenkins/volume/my-jenkins-volume/_data`?



What is the right way to add data to an existing named volume in Docker?

I&#39;ve got a form, in which I want to handle *change* event on text inputs, but React **onChange** triggering on **key down** (opposite to native JS, that triggers *change* event when an input field is **out of focus**).

Is there a *React way* to do what I want?

How to correctly catch change/focusOut event on text input in React.js?

I've got a form, in which I want to handle change event on text inputs, but React onChange triggering on key down (opposite to native JS, that triggers change event when an input field is out of focus).
Is there a React way to do what I want?

Is there a way to pass arguments rendered on the backend to angular2 bootstrap method? I want to set http header for all requests using [BaseRequestOptions][1] with value provided from the backend. My `main.ts` file looks like this:

    import { bootstrap } from &#39;@angular/platform-browser-dynamic&#39;;
    import { AppComponent } from &quot;./app.component.ts&quot;;
    
    bootstrap(AppComponent);

I found how to pass this arguments to root component (https://stackoverflow.com/a/35553650/3455681), but i need it when I&#39;m fireing `bootstrap` method... Any ideas?

**edit:**

webpack.config.js content:

    module.exports = {
      entry: {
        app: &quot;./Scripts/app/main.ts&quot;
      },
    
      output: {
        filename: &quot;./Scripts/build/[name].js&quot;
      },
    
      resolve: {
        extensions: [&quot;&quot;, &quot;.ts&quot;, &quot;.js&quot;]
      },
    
      module: {
        loaders: [
          {
            test: /\.ts$/,
            loader: &#39;ts-loader&#39;
          }
        ]
      }
    };



  [1]: https://angular.io/docs/ts/latest/api/http/BaseRequestOptions-class.html &quot;BaseRequestOptions&quot;

How to pass parameters rendered from backend to angular2 bootstrap method

I am getting this error and I am having a lot of trouble fixing this.

What I am trying to do here is have 3 different screens and have a tabbar that navigates to each screen.

Here is my index:

    import React, { Component } from &#39;react&#39;;
    import { AppRegistry, Navigator, StyleSheet, View, Text } from &#39;react-native&#39;;

    import Nav from &#39;./app/components/Nav&#39;;
    import Screen from &#39;./app/Screen&#39;;

    import Tabs from &#39;react-native-tabs&#39;

    import SwitchView from &#39;./SwitchView&#39;;

    class Proj extends Component {

	constructor(props){
		super(props);
	}

	render(){
		var x = &quot;FeedView&quot;;
		return(
			
			  &lt;View style={styles.container}&gt;
		        &lt;Tabs selected={x} style={{backgroundColor:&#39;white&#39;}}
		              selectedStyle={{color:&#39;red&#39;}} onSelect={el=&gt; {x = el.props.name}}&gt;
		            &lt;Text name=&quot;FeedView&quot;&gt;First&lt;/Text&gt;
		            &lt;Text name=&quot;WikiView&quot; selectedIconStyle={{borderTopWidth:2,borderTopColor:&#39;red&#39;}}&gt;Second&lt;/Text&gt;
		            &lt;Text name=&quot;BoardView&quot;&gt;Third&lt;/Text&gt;
		        &lt;/Tabs&gt;
	       		
       			&lt;SwitchView id={x}/&gt;
	 		         
		      &lt;/View&gt;
		);
	}
    }

    const styles = StyleSheet.create({
	container: {
    flex: 1,
    justifyContent: &#39;center&#39;,
    alignItems: &#39;center&#39;,
    backgroundColor: &#39;#F5FCFF&#39;,
	},
	welcome: {
	fontSize: 20,
	textAlign: &#39;center&#39;,
	margin: 10,
	},
	instructions: {
	textAlign: &#39;center&#39;,
	color: &#39;#333333&#39;,
	marginBottom: 5,
	},
    })

    AppRegistry.registerComponent(&#39;Proj&#39;, () =&gt; Proj);

here is my SwitchView:

    import Feed from &#39;./app/pages/Feed/Feed&#39;;
    import Board from &#39;./app/pages/Board&#39;;
    import Wiki from &#39;./app/pages/Wiki&#39;;

    class SwitchView extends Component {
	render(){
		var { id } = this.props;

		switch (id) {
			case &quot;FeedView&quot;:
				return &lt;Feed/&gt;
			case &quot;WikiView&quot;:
				return &lt;Wiki/&gt;
			case &quot;BoardView&quot;:
				return &lt;Board/&gt;
		}
	}
    }

React Native error: Element type is invalid: expected a string or a class/function but got: object

All four functions called below in `update` return promises.
```javascript
async function update() {
   var urls = await getCdnUrls();
   var metadata = await fetchMetaData(urls);
   var content = await fetchContent(metadata);
   await render(content);
   return;
}
```

What if we want to abort the sequence from outside, at any given time?

For example, while `fetchMetaData` is being executed, we realize we no longer need to render the component and we want to cancel the remaining operations (`fetchContent` and `render`). Is there a way to abort/cancel these operations from outside the `update` function? 

We could check against a condition after each `await`, but that seems like an inelegant solution, and even then we will have to wait for the current operation to finish.

Is there a way to short circuit async/await flow?

I am currently developing a web application with the Facebook Graph API.

My current goal is to retrieve only posts which have a location attached.

While retrieving posts with and without location is already working, I am not able to retrieve only posts with location.

The query which retrieves both types looks like this: `&#39;/me/feed?fields=id,name,message,picture,place,with_tags&amp;limit=100&amp;with=location&#39;`

The query which should retrieve only posts with location looks like this: `/me/feed?fields=id,name,message,picture,place,with_tags&amp;limit=100&amp;with=location`

The problem I have is that with the parameter `&amp;with=location` I get an error `Uncaught (in promise) undefined` at this part of my code:


    if (response.paging &amp;&amp; response.paging.next) {
        recursiveAPICall(response.paging.next);
      } else {
        resolve(postsArr);
      }
    } else {
      // Error message comes from here
      reject();
    }

Log shows the following:

    DEBUG: -------------------------------
    DEBUG: Ember             : 2.4.5
    DEBUG: Ember Data        : 2.5.3
    DEBUG: jQuery            : 2.2.4
    DEBUG: Ember Simple Auth : 1.1.0
    DEBUG: -------------------------------
    Object {error: Object}
      error: Objectcode: 
        code: 1
        1fbtrace_id: &quot;H5cXMe7TJIn&quot;
        message: &quot;An unknown error has occurred.&quot;
        type: &quot;OAuthException&quot;
        __proto__: Object
      __proto__: Object
    Uncaught (in promise) undefined

Does anyone have a possible solution for this?

For further information how the code looks like see my [previous question][1].


  [1]: https://stackoverflow.com/questions/37621010/how-to-retrieve-all-posts-of-a-user-via-facebook-graph-api-using-promises-and-re/37621318?noredirect=1


&quot;Uncaught (in promise) undefined&quot; error when using with=location in Facebook Graph API query

These are my sample files:

    &lt;!DOCTYPE html&gt;
    &lt;html&gt;
    &lt;head&gt;
      &lt;title&gt;Test&lt;/title&gt;
      &lt;script src=&quot;t1.js&quot;&gt;&lt;/script&gt;
    &lt;/head&gt;
    &lt;body&gt;&lt;/body&gt;
    &lt;/html&gt;


t1.js:

    import Test from &#39;t2.js&#39;;

t2.js:

    export const Test = console.log(&quot;Hello world&quot;);

When I load the page in Firefox 46, it returns &quot;SyntaxError: import declarations may only appear at top level of a module&quot; - but I&#39;m not sure how much more top-level the import statement can get here. Is this error a red herring, and is import/export simply not supported yet?

ES2015 import doesn&#39;t work (even at top-level) in Firefox

I want to build a chat system and automatically scroll to the bottom when entering the window and when new messages come in. How do you automatically scroll to the bottom of a container in React?

How to scroll to bottom in react?

I am having some trouble with my project. Can anyone explain to me why I can&#39;t use the `e.target` to access anything other than `className`?

Below is the code from my entry point:

    import React from &#39;react&#39;
    import ReactDOM from &#39;react-dom&#39;
    import Button from &#39;./Button&#39;
    import Menu from &#39;./Menu&#39;

    function test(e){
	    console.log(e.target.ref)
     }

    module.exports = class Content extends React.Component {
	    constructor(props){
    	    super(props)
    	    this.state={content: &#39;&#39;}
	    }

    update(e){
		console.log(e.target.txt)
		
	}

	render (){
	    return (
	    	&lt;div id=&quot;lower&quot;&gt;
		    	&lt;div id=&quot;menu&quot;&gt;
			       &lt;Menu onClick={this.update.bind(this)}/&gt;
		    	&lt;/div&gt;
		    	&lt;div id=&quot;content&quot;&gt;
		    		{this.state.content}
	    		&lt;/div&gt;
	    	&lt;/div&gt;
	   	)

	  }
    }

I am trying to access the setting in the **Menu** component, using the `update` method. See **Menu** below:

    module.exports = class Menu extends React.Component {

	    render (){
	       return (
	    	   &lt;div&gt;
		    	   &lt;Button space=&quot;home&quot; className=&quot;home&quot; txt=&quot;Home&quot; onClick={this.props.onClick}/&gt;
		    	
	    	&lt;/div&gt;
	       )

     	}
    }

I really want to know why I can access the `txt` and `space` value using `e.target`. I have read the documentation and looked for other sources but I have no answer yet, but I am hoping there is a way it can be done.

Using event.target with React components

I have some problem with my images on my react project. Indeed I always thought that relative path into src attribute was built on the files architecture

Here my files architecture:

    components
        file1.jsx
        file2.jsx
        file3.jsx
    container
    img
    js 
    ... 

However I realized that the path is built on the url. In one of my component (for example into file1.jsx) I have this:

    localhost/details/2
    &lt;img src=&quot;../img/myImage.png&quot; /&gt; -&gt; works
    
    localhost/details/2/id
    &lt;img src=&quot;../img/myImage.png&quot; /&gt; -&gt; doesn&#39;t work, images are not displayed

How is it possible to solve this problem? I want that in any form of routes handled by react-router, all images can be displayed with the same path.

Correct path for img on React.js

If I have something like

    &lt;Parent&gt;
      &lt;Child1 /&gt;
      &lt;Child2 /&gt;
      &lt;Child3 /&gt;
    &lt;/Parent&gt;

And I want to access from `Child2` where I have `refs=&quot;child2refs&quot;`, how can I do that?


Content Type	Original Author	Original Content on Stackoverflow
Question	Alex Suslyakov	View Question on Stackoverflow
Solution 1 - Javascript	Dominic	View Answer on Stackoverflow
Solution 2 - Javascript	jossie	View Answer on Stackoverflow
Solution 3 - Javascript	kahlan88	View Answer on Stackoverflow
Solution 4 - Javascript	majid gabrlo	View Answer on Stackoverflow

How to correctly catch change/focusOut event on text input in React.js?

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

Solution 3 - Javascript

Solution 4 - Javascript

What is the right way to add data to an existing named volume in Docker?

How to configure Spring Security to allow Swagger URL to be accessed without authentication

Attributions