Madelyn  Frami

Madelyn Frami

1603133640

This LED coffee table reacts to whatever's on top

The YouTube team “Ty and Gig Builds” recently decided to make their coffee table a little more interesting , adding a chain of 96 addressable LEDs underneath its clear surface. This would have been neat enough by itself, but their project doesn’t just stop there and instead embeds 154 IR emitters and 154 IR receivers, allowing it to react to what’s on top. Beyond that, it’s able to display animations without using the sensors for a mesmerizing effect.

#arduino #led(s) #mega #interactive coffee table #led coffee table #react native

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This LED coffee table reacts to whatever's on top
Autumn  Blick

Autumn Blick

1598839687

How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

  • Performance: It delivers optimal performance.
  • Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
  • UI design: React Native enables you to design simple and responsive UI for your mobile app.
  • 3rd party plugins: This framework supports 3rd party plugins.
  • Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

  • Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
  • Near-native user experience: React Native provides several native components, and these are platform agnostic.
  • The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

Madelyn  Frami

Madelyn Frami

1603133640

This LED coffee table reacts to whatever's on top

The YouTube team “Ty and Gig Builds” recently decided to make their coffee table a little more interesting , adding a chain of 96 addressable LEDs underneath its clear surface. This would have been neat enough by itself, but their project doesn’t just stop there and instead embeds 154 IR emitters and 154 IR receivers, allowing it to react to what’s on top. Beyond that, it’s able to display animations without using the sensors for a mesmerizing effect.

#arduino #led(s) #mega #interactive coffee table #led coffee table #react native

Top 10 React Native App Development Companies in USA

React Native is the most popular dynamic framework that provides the opportunity for Android & iOS users to download and use your product. Finding a good React Native development company is incredibly challenging. Use our list as your go-to resource for React Native app development Companies in USA.

List of Top-Rated React Native Mobile App Development Companies in USA:

  1. AppClues Infotech
  2. WebClues Infotech
  3. AppClues Studio
  4. WebClues Global
  5. Data EximIT
  6. Apptunix
  7. BHW Group
  8. Willow Tree:
  9. MindGrub
  10. Prismetric

A Brief about the company details mentioned below:

1. AppClues Infotech
As a React Native Mobile App Development Company in USA, AppClues Infotech offers user-centered mobile app development for iOS & Android. Since their founding in 2014, their React Native developers create beautiful mobile apps.

They have a robust react native app development team that has high knowledge and excellent strength of developing any type of mobile app. They have successfully delivered 450+ mobile apps as per client requirements and functionalities.
Website: https://www.appcluesinfotech.com/

2. WebClues Infotech
WebClues Infotech is the Top-Notch React Native mobile app development company in USA & offering exceptional service worldwide. Since their founding in 2014, they have completed 950+ web & mobile apps projects on time.

They have the best team of developers who has an excellent knowledge of developing the most secure, robust & Powerful React Native Mobile Apps. From start-ups to enterprise organizations, WebClues Infotech provides top-notch React Native App solutions that meet the needs of their clients.
Website: https://www.webcluesinfotech.com/

3. AppClues Studio
AppClues Studio is one of the top React Native mobile app development company in USA and offers the best service worldwide at an affordable price. They have a robust & comprehensive team of React Native App developers who has high strength & extensive knowledge of developing any type of mobile apps.
Website: https://www.appcluesstudio.com/

4. WebClues Global
WebClues Global is one of the best React Native Mobile App Development Company in USA. They provide low-cost & fast React Native Development Services and their React Native App Developers have a high capability of serving projects on more than one platform.

Since their founding in 2014, they have successfully delivered 721+ mobile app projects accurately. They offer versatile React Native App development technology solutions to their clients at an affordable price.
Website: https://www.webcluesglobal.com/

5. Data EximIT
Hire expert React Native app developer from top React Native app development company in USA. Data EximIT is providing high-quality and innovative React Native application development services and support for your next projects. The company has been in the market for more than 8 years and has already gained the trust of 553+ clients and completed 1250+ projects around the globe.

They have a large pool of React Native App developers who can create scalable, full-fledged, and appealing mobile apps to meet the highest industry standards.
Website: https://www.dataeximit.com/

6. Apptunix
Apptunix is the best React Native App Development Company in the USA. It was established in 2013 and vast experience in developing React Native apps. After developing various successful React Native Mobile Apps, the company believes that this technology helps them incorporate advanced features in mobile apps without influencing the user experience.
Website: https://www.apptunix.com/

7. BHW Group
BHW Group is a Top-Notch React Native Mobile App Development Company in the USA. The company has 13+ years of experience in providing qualitative app development services to clients worldwide. They have a compressive pool of React Native App developers who can create scalable, full-fledged, and creative mobile apps to meet the highest industry standards.
Website: https://thebhwgroup.com/

8. Willow Tree:
Willow Tree is the Top-Notch React Native Mobile App Development Company in the USA & offering exceptional React Native service. They have the best team of developers who has an excellent knowledge of developing the most secure, robust & Powerful React Native Mobile Apps. From start-ups to enterprise organizations, Willow Tree has top-notch React Native App solutions that meet the needs of their clients.
Website: https://willowtreeapps.com/

9. MindGrub
MindGrub is a leading React Native Mobile App Development Company in the USA. Along with React Native, the company also works on other emerging technologies like robotics, augmented & virtual reality. The Company has excellent strength and the best developers team for any type of React Native mobile apps. They offer versatile React Native App development technology solutions to their clients.
Website: https://www.mindgrub.com/

10. Prismetric
Prismetric is the premium React Native Mobile App Development Company in the USA. They provide fast React Native Development Services and their React Native App Developers have a high capability of serving projects on various platforms. They focus on developing customized solutions for specific business requirements. Being a popular name in the React Native development market, Prismetric has accumulated a specialty in offering these services.
Website: https://www.prismetric.com/

#top rated react native app development companies in usa #top 10 react native app development companies in usa #top react native app development companies in usa #react native app development technologies #react native app development #hire top react native app developers in usa

Iara  Simões

Iara Simões

1657363500

Como Usar Variáveis ​​de Referência De Modelo Em Angular

Neste post você aprenderá a usar variáveis ​​de referência de modelo, muitas vezes conhecidas como “Referências de modelo”, em Angular.

Em Angular, os componentes possuem uma templatepropriedade, que contém elementos e outros componentes. Uma variável de referência de modelo é um recurso que nos permite obter acesso a uma parte de nosso modelo.

Isso pode ser um elemento, componente ou pode ser uma diretiva. As variáveis ​​de referência de modelo são implementadas de maneira inteligente e podem ser usadas de várias maneiras.

A primeira pode ser simplesmente exportar uma referência a um elemento. Aqui podemos anexar a #a an <input>e fornecer um nome de variável (daí a referência do modelo 'variable'):

<input type="text" #coffee>

Você pode pensar nessa sintaxe como uma “exportação”. Estamos exportando uma referência ao elemento.

Isso significa que agora podemos acessar as propriedades dessa variável de referência como se ela fosse retornada para nós por meio de JavaScript simples (pense no que você voltaria usando document.querySelector('input')e é isso que temos aqui):

<input type="text" #coffee>

<p>{{ coffee.value }}</p>

Isso desconectaria uma string vazia coffee.value, pois não temos value. Nossa coffeevariável está nos dando diretamente um HTMLInputElement.

Para vermos o valor enquanto digitamos, precisaríamos introduzir a ngModelDiretiva:

<input type="text" ngModel #coffee>

<p>{{ coffee.value }}</p>

Experimente e digite algo no <input>:

https://stackblitz.com/edit/angular-ivy-t3y6jt?file=src%2Fapp%2Fapp.component.ts

Então aqui está o próximo grande recurso das referências de modelo.

Vamos exportar uma referência para o nosso ngModele mudar o contexto do que #coffeenos retorna.

Ao especificar #coffee, estamos implicitamente deixando o Angular decidir o que exportar, porque não estamos especificando nada além de vincular ao elemento.

Estamos vinculando ngModel, que agora é 'parte' do nosso <input>. Vamos exportá-lo:

<input type="text" ngModel #coffee="ngModel">

<p>Value: {{ coffee.value }}</p>
<p>Pristine: {{ coffee.pristine }}</p>
<p>Touched: {{ coffee.touched }}</p>

Ao passar #coffee="ngModel", estamos vinculando explicitamente uma referência à nossa ngModeldiretiva rastreada.

Não temos mais HTMLInputElement. Temos uma referência a NgControl.

Você pode verificar o código-fonte do NgControl aqui, que estende as classes NgControl e AbstractControlDirective .

Por que estamos olhando para isso? Porque ele mostra todas as propriedades disponíveis para você, e é exatamente por isso que referenciamos não apenas , valuemas pristinee touchedtambém.

Experimente-os abaixo, nossa variável de referência de modelo está espelhando o ngModel:

Podemos aprofundar isso e acessar um template ref dentro de um componente , para que possamos acessar propriedades e métodos de dentro do classe não apenas do template.

https://stackblitz.com/edit/angular-ivy-jwci6u?file=src%2Fapp%2Fapp.component.ts

Isso é conseguido usando talvez TemplateRefou ElementRefao lado de um @ViewChilddecorador. Leia o artigo acima sobre como fazer isso e um trabalho mais profundo, mas essencialmente se parece com isso:

@Component({...})
export class AppComponent {
  @ViewChild('username') input: ElementRef<HTMLInputElement>;
}

Essa é uma boa introdução às referências de modelo, e espero que dê a você uma compreensão mais profunda de como usá-las, quando e onde. Não apenas isso, mas o que esperar quando você declarar um template ref e como também exportar referências para coisas como diretivas.

Feliz refrão! 

Fonte: https://ultimatecourses.com/blog/angular-template-reference-variables

#angular 

Diego  Elizondo

Diego Elizondo

1657359660

Usar Variables De Referencia De Plantilla En Angular

En esta publicación, aprenderá cómo usar variables de referencia de plantilla, a menudo conocidas como "Referencias de plantilla", en Angular.

En Angular, los componentes tienen una templatepropiedad que contiene elementos y otros componentes. Una variable de referencia de plantilla es una característica que nos permite acceder a una parte de nuestra plantilla.

Esto podría ser un elemento, componente o podría ser una directiva. Las variables de referencia de plantilla están inteligentemente implementadas y se pueden usar de varias maneras.

La primera podría ser simplemente exportar una referencia a un elemento. Aquí podemos adjuntar un #a un <input>y proporcionar un nombre de variable (de ahí la referencia de plantilla 'variable'):

<input type="text" #coffee>

Puede pensar en esta sintaxis como una "exportación". Estamos exportando una referencia al elemento.

Eso significa que ahora podemos acceder a las propiedades de esa variable de referencia como si nos la devolvieran a través de JavaScript simple (piense en lo que obtendría document.querySelector('input')y eso es lo que tenemos aquí):

<input type="text" #coffee>

<p>{{ coffee.value }}</p>

Esto cerraría la sesión como una cadena vacía coffee.value, ya que no tenemos value. Nuestra coffeevariable nos está dando directamente un HTMLInputElement.

Para que podamos ver el valor a medida que escribimos, necesitaríamos introducir la ngModelDirectiva:

<input type="text" ngModel #coffee>

<p>{{ coffee.value }}</p>

Pruébelo y escriba algo en el <input>:

https://stackblitz.com/edit/angular-ivy-t3y6jt?file=src%2Fapp%2Fapp.component.ts

Así que aquí está la próxima gran característica de las referencias de plantilla.

Exportemos una referencia a nuestro ngModely cambiemos el contexto de lo que #coffeenos devuelve.

Al especificar #coffee, dejamos implícitamente que Angular decida qué exportar, porque no estamos especificando nada más que enlazar con el elemento.

Estamos vinculantes ngModel, que ahora es 'parte de' nuestro <input>. Vamos a exportarlo:

<input type="text" ngModel #coffee="ngModel">

<p>Value: {{ coffee.value }}</p>
<p>Pristine: {{ coffee.pristine }}</p>
<p>Touched: {{ coffee.touched }}</p>

Al pasar #coffee="ngModel", vinculamos explícitamente una referencia a nuestra ngModeldirectiva rastreada.

Ya no tenemos un HTMLInputElement. Tenemos una referencia a NgControl.

Puede consultar el código fuente de NgControl aquí, que amplía las clases NgControl y AbstractControlDirective .

¿Por qué estamos viendo esto? Porque le muestra todas las propiedades disponibles para usted, que es exactamente la razón por la que hemos mencionado no solo valuepero pristiney touchedtambién.

Pruébelos a continuación, nuestra variable de referencia de plantilla está reflejando ngModel:

Podemos promover esto y acceder a una referencia de plantilla dentro de un componente , de modo que podamos acceder a propiedades y métodos desde dentro classy no solo desde template.

https://stackblitz.com/edit/angular-ivy-jwci6u?file=src%2Fapp%2Fapp.component.ts

Esto se logra mediante el uso de quizás TemplateRefo ElementRefjunto con un @ViewChilddecorador. Lea el artículo anterior sobre cómo hacerlo y un trabajo más profundo, pero esencialmente se ve así:

@Component({...})
export class AppComponent {
  @ViewChild('username') input: ElementRef<HTMLInputElement>;
}

Esa es una buena introducción a las referencias de plantilla, y espero que le brinde una comprensión más profunda de cómo usarlas, cuándo y dónde. No solo esto, sino qué esperar cuando declara una referencia de plantilla y cómo exportar también referencias a cosas como directivas.

¡Feliz refrigerio! 

Fuente: https://ultimatecourses.com/blog/angular-template-reference-variables

#angular