Kyle  M. Farish

Kyle M. Farish

1564978057

Vue.js Pattern for Async Requests: Using Renderless Components

Most Vue apps need asynchronous HTTP requests and there are many ways to realize them: in the mounted() lifecycle hook, in a method triggered by a button, within the store (when using vuex) or in the asyncData() and fetch() methods (with Nuxt).

While a simple request is very easy with axios, we usually want to cover at least two additional states:

  1. Show something to the user while the request is pending
  2. Handle errors gracefully

Handling these states adds additional code and can quickly lead to code-duplication when having to implement many different requests.

Contents

  1. Origin of the Idea
  2. HTTP requests: A typical example
  3. The Async Renderless Component
  • Why not a mixin or directive?
  • An applied example

To cut right to the meat, jump to The Async Renderless Component.

Note: Axios is used to make HTTP requests in this example, but it works just as well with any other library for AJAX requests. Also, this example uses this wonderful free Dog API: https://dog.ceo/dog-api/ 🐶.

Origin of the Idea

The idea is not my own, but borrowed from Vue.js creator Evan You @youyuxi who voiced it secondarily while talking about Advanced Vue Components with Adam Whatan on the Full Stack Radio Podcast during Episode 81.

HTTP request in Vue Components: A typical example

Let's start with a minimal example to request a random dog image. The mounted() hook contains the axios call which populates the image variable.

Vue.component("example", {
  el: "#example",
  data() {
    return {
      image: null
    };
  },
  mounted() {
    axios
      .get("https://dog.ceo/api/breeds/image/random")
      .then(function(response) {
        this.image = response.data;
      });
  }
});

Simple enough. However, we want to show a loading animation and handle request errors. So in addition to the image variable pending: false and error: null are added. The mounted() hook then looks as follows:

Vue.component("example", {
  [...]
  mounted() {
    this.pending = true;
    axios
      .get("https://dog.ceo/api/breeds/image/random")
      .then(function(response) { this.image = response.data })
      .catch(function(error) { this.error = error })
      .finally(function () { this.pending = false });
  }
});

Now a loading indicator can be shown for pending === true and a basic error message can be displayed if error !== null. It's really simple, but it can get tedious to implement this pending/success/error behavior repeatedly. Besides, if the request contains parameters that can be changed by the user, e.g. filters or sorting options, then the request has to move to a method which has to be called, whenever the parameters changes, to reload the data.

One easy and effective way to abstract away this simple behavior and make it reusable is ...

The Async Renderless Component

This component makes use of the incredibly versatile Scoped Slot feature. A slot is any piece of HTML that can be passed to a component, telling the component: "Here, render this somewhere". With scoped slots the component which receives the HTML snipped answers: "Awesome, I will put your HTML right there. And here is some data you can use with your snipped if you like".

The Async Renderless component is just such a component that receives a snippet of HTML, a URL and parameters and answers: "Hey look, I am requesting this data for you, here is datapending and error for you to use."

The Async Renderless Component in full:

Vue.component("async", {
  props: {
    url: { type: String, default: "", required: true },
    params: { type: Object, default: () => ({}) }
  },
  data() {
    return {
      pending: true,
      error: false,
      data: null
    };
  },
  watch: {
    url() {
      this.requestData();
    },
    params: {
      handler() {
        this.requestData();
      },
      deep: true
    }
  },
  mounted() {
    this.requestData();
  },
  methods: {
    async requestData() {
      this.pending = true;
      try {
        const { data } = await axios.get(this.url, { params: this.params });
        this.data = data;
        this.error = false;
      } catch (e) {
        this.data = null;
        this.error = e;
      }
      this.pending = false;
    }
  },
  render() {
    return this.$scopedSlots.default({
      pending: this.pending,
      error: this.error,
      data: this.data
    });
  }
});

Note: I am using some javascript magic here: Arrow Functions, Async/Await and try...catch.

The "renderless" happens in the render() tag. Instead of an HTML tag, these components only renders the HTML snippet it receives in its slot as scoped slot, passing three data points to it: pendingerror and data.

The watch functions make sure that the data is reloaded whenever either url or params change.

We use the async component inside our template like this:

<async url="https://dog.ceo/api/breed/husky/images">
  <template v-slot:default="{ pending, error, data }">
    <div v-if="pedning">Loading ...</div>
    <div v-else-if="error">{{ error }}</div>
    <div v-else>{{ data }}</div>
  </template>
</async>

Why a renderless component and not a mixin or directive?

Components are not the only way to reuse code in Vue, another way is to use a Mixin or a Custom Directive. Both are fine ways to solve this problem. Renderless components utilizing scoped slots are operating the way Vue wants to work, it can be imported when needed just like you are used to with any other component. Thus it's a very explicit way to reuse code as opposed to mixins or directives which don't have to be included separately. In the end, it comes down to preference.

An applied example

I constantly find myself implementing lists when working with APIs which usually feature things like pagination, filters, sorting and search. So I decided to put together a "real-life" example which renders a simple list of dog images with a very simple filter option for some different breeds (and a wrong API call to see the error state):

Whenever one of the filter buttons is clicked the URL, which is passed to the async component, is updated with the appropriate breed. The async component takes care of the HTTP request. No more HTTP request logic is needed in the parent component, separation of concerns is obeyed, our minds are freed and the universe is in harmony 😄.

Thanks For Visiting, Keep Visiting. If you liked this post, share it with all of your programming buddies!

Further reading

☞ Vue JS 2 - The Complete Guide (incl. Vue Router & Vuex)

☞ Nuxt.js - Vue.js on Steroids

☞ Best JavaScript Frameworks, Libraries and Tools to Use in 2019

☞ Build a Progressive Web App In VueJs

☞ Build a CMS with Laravel and Vue

☞ Beginner’s Guide to Vue.js

☞ Hands-on Vue.js for Beginners

☞ Top 3 Mistakes That Vue.js Developers Make and Should be Avoided

☞ Microfrontends — Connecting JavaScript frameworks together (React, Angular, Vue etc)

☞ Ember.js vs Vue.js - Which is JavaScript Framework Works Better for You

☞ Vue.js Tutorial: Zero to Sixty


This post was originally published here

#vue-js #nuxt-js #javascript #web-development

What is GEEK

Buddha Community

Vue.js Pattern for Async Requests: Using Renderless Components
Aria Barnes

Aria Barnes

1625232484

Why is Vue JS the most Preferred Choice for Responsive Web Application Development?

For more than two decades, JavaScript has facilitated businesses to develop responsive web applications for their customers. Used both client and server-side, JavaScript enables you to bring dynamics to pages through expanded functionality and real-time modifications.

Did you know!

According to a web development survey 2020, JavaScript is the most used language for the 8th year, with 67.7% of people choosing it. With this came up several javascript frameworks for frontend, backend development, or even testing.

And one such framework is Vue.Js. It is used to build simple projects and can also be advanced to create sophisticated apps using state-of-the-art tools. Beyond that, some other solid reasons give Vuejs a thumbs up for responsive web application development.

Want to know them? Then follow this blog until the end. Through this article, I will describe all the reasons and benefits of Vue js development. So, stay tuned.

Vue.Js - A Brief Introduction

Released in the year 2014 for public use, Vue.Js is an open-source JavaScript framework used to create UIs and single-page applications. It has over 77.4 million likes on Github for creating intuitive web interfaces.

The recent version is Vue.js 2.6, and is the second most preferred framework according to Stack Overflow Developer Survey 2019.

Every Vue.js development company is widely using the framework across the world for responsive web application development. It is centered around the view layer, provides a lot of functionality for the view layer, and builds single-page web applications.

Some most astonishing stats about Vue.Js:

• Vue was ranked #2 in the Front End JavaScript Framework rankings in the State of JS 2019 survey by developers.

• Approximately 427k to 693k sites are built with Vue js, according to Wappalyzer and BuiltWith statistics of June 2020.

• According to the State of JS 2019 survey, 40.5% of JavaScript developers are currently using Vue, while 34.5% have shown keen interest in using it in the future.

• In Stack Overflow's Developer Survey 2020, Vue was ranked the 3rd most popular front-end JavaScript framework.

Why is Vue.Js so popular?

• High-speed run-time performance
• Vue.Js uses a virtual DOM.
• The main focus is on the core library, while the collaborating libraries handle other features such as global state management and routing.
• Vue.JS provides responsive visual components.

Top 7 Reasons to Choose Vue JS for Web Application Development

Vue js development has certain benefits, which will encourage you to use it in your projects. For example, Vue.js is similar to Angular and React in many aspects, and it continues to enjoy increasing popularity compared to other frameworks.

The framework is only 20 kilobytes in size, making it easy for you to download files instantly. Vue.js easily beats other frameworks when it comes to loading times and usage.

Take a look at the compelling advantages of using Vue.Js for web app development.

#1 Simple Integration

Vue.Js is popular because it allows you to integrate Vue.js into other frameworks such as React, enabling you to customize the project as per your needs and requirements.

It helps you build apps with Vue.js from scratch and introduce Vue.js elements into their existing apps. Due to its ease of integration, Vue.js is becoming a popular choice for web development as it can be used with various existing web applications.

You can feel free to include Vue.js CDN and start using it. Most third-party Vue components and libraries are additionally accessible and supported with the Vue.js CDN.

You don't need to set up node and npm to start using Vue.js. This implies that it helps develop new web applications, just like modifying previous applications.

The diversity of components allows you to create different types of web applications and replace existing frameworks. In addition, you can also choose to hire Vue js developers to use the technology to experiment with many other JavaScript applications.

#2 Easy to Understand

One of the main reasons for the growing popularity of Vue.Js is that the framework is straightforward to understand for individuals. This means that you can easily add Vue.Js to your web projects.

Also, Vue.Js has a well-defined architecture for storing your data with life-cycle and custom methods. Vue.Js also provides additional features such as watchers, directives, and computed properties, making it extremely easy to build modern apps and web applications with ease.

Another significant advantage of using the Vue.Js framework is that it makes it easy to build small and large-scale web applications in the shortest amount of time.

#3 Well-defined Ecosystem

The VueJS ecosystem is vibrant and well-defined, allowing Vue.Js development company to switch users to VueJS over other frameworks for web app development.

Without spending hours, you can easily find solutions to your problems. Furthermore, VueJs lets you choose only the building blocks you need.

Although the main focus of Vue is the view layer, with the help of Vue Router, Vue Test Utils, Vuex, and Vue CLI, you can find solutions and recommendations for frequently occurring problems.

The problems fall into these categories, and hence it becomes easy for programmers to get started with coding right away and not waste time figuring out how to use these tools.

The Vue ecosystem is easy to customize and scales between a library and a framework. Compared to other frameworks, its development speed is excellent, and it can also integrate different projects. This is the reason why most website development companies also prefer the Vue.Js ecosystem over others.

#4 Flexibility

Another benefit of going with Vue.Js for web app development needs is flexibility. Vue.Js provides an excellent level of flexibility. And makes it easier for web app development companies to write their templates in HTML, JavaScript, or pure JavaScript using virtual nodes.

Another significant benefit of using Vue.Js is that it makes it easier for developers to work with tools like templating engines, CSS preprocessors, and type checking tools like TypeScript.

#5 Two-Way Communication

Vue.Js is an excellent option for you because it encourages two-way communication. This has become possible with the MVVM architecture to handle HTML blocks. In this way, Vue.Js is very similar to Angular.Js, making it easier to handle HTML blocks as well.

With Vue.Js, two-way data binding is straightforward. This means that any changes made by the developer to the UI are passed to the data, and the changes made to the data are reflected in the UI.

This is also one reason why Vue.Js is also known as reactive because it can react to changes made to the data. This sets it apart from other libraries such as React.Js, which are designed to support only one-way communication.

#6 Detailed Documentation

One essential thing is well-defined documentation that helps you understand the required mechanism and build your application with ease. It shows all the options offered by the framework and related best practice examples.

Vue has excellent docs, and its API references are one of the best in the industry. They are well written, clear, and accessible in dealing with everything you need to know to build a Vue application.

Besides, the documentation at Vue.js is constantly improved and updated. It also includes a simple introductory guide and an excellent overview of the API. Perhaps, this is one of the most detailed documentation available for this type of language.

#7 Large Community Support

Support for the platform is impressive. In 2018, support continued to impress as every question was answered diligently. Over 6,200 problems were solved with an average resolution time of just six hours.

To support the community, there are frequent release cycles of updated information. Furthermore, the community continues to grow and develop with backend support from developers.



Wrapping Up

VueJS is an incredible choice for responsive web app development. Since it is lightweight and user-friendly, it builds a fast and integrated web application. The capabilities and potential of VueJS for web app development are extensive.

While Vuejs is simple to get started with, using it to build scalable web apps requires professionalism. Hence, you can approach a top Vue js development company in India to develop high-performing web apps.

Equipped with all the above features, it doesn't matter whether you want to build a small concept app or a full-fledged web app; Vue.Js is the most performant you can rely on.

Original source

 

#vue js development company #vue js development company in india #vue js development company india #vue js development services #vue js development #vue js development companies

Luna  Mosciski

Luna Mosciski

1600583123

8 Popular Websites That Use The Vue.JS Framework

In this article, we are going to list out the most popular websites using Vue JS as their frontend framework.

Vue JS is one of those elite progressive JavaScript frameworks that has huge demand in the web development industry. Many popular websites are developed using Vue in their frontend development because of its imperative features.

This framework was created by Evan You and still it is maintained by his private team members. Vue is of course an open-source framework which is based on MVVM concept (Model-view view-Model) and used extensively in building sublime user-interfaces and also considered a prime choice for developing single-page heavy applications.

Released in February 2014, Vue JS has gained 64,828 stars on Github, making it very popular in recent times.

Evan used Angular JS on many operations while working for Google and integrated many features in Vue to cover the flaws of Angular.

“I figured, what if I could just extract the part that I really liked about Angular and build something really lightweight." - Evan You

#vuejs #vue #vue-with-laravel #vue-top-story #vue-3 #build-vue-frontend #vue-in-laravel #vue.js

sophia tondon

sophia tondon

1618971133

Top 10 VueJS Development Companies To Know In 2021-22

Vue.js is one of the most used and popular frontend development, or you can say client-side development framework. It is mainly used to develop single-page applications for both web and mobile. Famous companies like GitLab, NASA, Monito, Adobe, Accenture are currently using VueJS.

Do You Know?

Around 3079 companies reportedly use Vue.js in their tech stacks.
At GitHub, VueJS got 180.9K GitHub stars, including 28.5K GitHub forks.
Observing the increasing usage of VueJS and its robust features, various industry verticals are preferring to develop the website and mobile app Frontend using VueJS, and due to this reason, businesses are focusing on hiring VueJS developers from the top Vue.js development companies.

But the major concern of the enterprises is how to find the top companies to avail leading VueJS development service? Let’s move further and know what can help you find the best VueJS companies.

Read More - https://www.valuecoders.com/blog/technology-and-apps/top-10-vuejs-development-companies/

#hire vue js developer #hire vue.js developers #hire vue.js developer, #hire vue.js developers, #vue js development company #vue.js development company

Top VueJS App Development Company in USA

AppClues Infotech is the best & most reliable VueJS App Development Company in USA that builds high-quality and top-notch mobile apps with advanced methodology. The company is focused on providing innovative & technology-oriented solutions as per your specific business needs.

The organization’s VueJS developers have high experience and we have the capability of handling small to big projects. Being one of the leading mobile app development company in USA we are using the latest programming languages and technologies for their clients.

Key Elements:

· Total year of experience - 8+

· Employees Strength - 120+

· Hourly Rate - $25 – $45 / hr

· Location - New York, USA

· Successfully launched projects - 450+

VueJS Development Services by AppClues Infotech

· Custom VueJS Development

· Portal Development Solutions

· Web Application Development

· VueJS Plugin Development

· VueJS Ecommerce Development

· SPA (Single Page App) Development

· VueJS Migration

Why Hire VueJS Developers from AppClues Infotech?

· Agile & Adaptive Development

· 8+ Years of Average Experience

· 100% Transparency

· Guaranteed Bug-free VueJS Solution

· Flexible Engagement Models

· On-Time Project Delivery

· Immediate Technical Support

If you have any project ideas for VueJS app development then share your requirements with AppClues Infotech to get the best solution for your dream projects.

For more info:
Share Yoru Requirements: https://www.appcluesinfotech.com/contact-us/
Email: info@appcluesinfotech.com
Call: +1-978-309-9910
**

#top vue.js development company #vue.js app development company #best vue js development company #hire top vue js developers #hire top vue.js developers in usa #vue js development company usa

Extending Vue.js Components

What’s the best way to “extend” a Vue component, i.e. use one component as the basis for other components?

Doing this could save you from duplicating code, making your components quicker to develop and easier to maintain.

There are a number of APIs and patterns that Vue offers for this, and you’ll need to choose the right one depending both on your goals and personal taste.

In this article, I’ll give you an overview of the different options to help you choose the best and most suitable for your scenario.

Do you really need to extend your component?

Keep in mind that all methods of extending components can add complexity and verbosity to your code, and in some cases, additional performance overhead.

So before you decide to extend a component, it’s a good idea to first check if there are simpler design patterns that can achieve what you want.

The following component design patterns can often be sufficient substitutes for extending a component:

  • Props-driven template logic
  • Slots
  • JavaScript utility functions

Let’s do our due diligence by briefly reviewing these.

Props-driven template logic

The easiest way to make a component multi-use, and thus avoid extending it, is to provide a prop which drives conditional logic in the template.

In the following example, we use a prop type for this purpose.

<template>
  <div class="wrapper">
    <div v-if="type === 'a'">...</div>
    <div v-else-if="type === 'b'">...</div>
    <!--etc etc-->
  </div>
</template>
<script>
export default {
  props: { type: String },
  ...
}
</script>

A parent can then declare this component and use the prop to get the variation required.

<template>
  <MyVersatileComponent type="a" />
  <MyVersatileComponent type="b" />
</template>

Here are two indicators that you’ve either hit the limits of this pattern or are misusing it:

  1. The component composition model makes an app scalable by breaking down the state and logic into atomic parts. If you have too many variations in the one component (a “mega component”) you’ll find it won’t be readable or maintainable.
  2. Props and template logic are intended to make a component dynamic but come at a runtime resource cost. It’s an anti-pattern if you’re using this mechanism to solve a code composition problem at runtime.

Slots

Another way to make a component versatile without extending it is to allow the parent component to set custom content within the child using slots.

<template>
  <div class="wrapper">
    <h3>Common markup</div>
    <slot />
  </div>
</template>
<template>
  <MyVersatileComponent>
    <h4>Inserting into the slot</h4>
  </MyVersatileComponent>
</template>

Renders as:

<div class="wrapper">
  <h3>Common markup</div>
  <h4>Inserting into the slot</h4>
</div>

A potential limitation of this pattern is that the elements in the slot belong to the parent’s context, which may not be a natural way of dividing your logic and state.

Scoped slots can bring more flexibility, and we’ll explore these more in the section on renderless components.

JavaScript utility functions

If you only need to reuse standalone functions across your components, you can simply extract these into JavaScript modules without any need to use an extending pattern.

JavaScript’s module system is a very flexible and robust way of sharing code, so you should lean on it where possible.

export default function () {
  ...
}
import MyUtilityFunction from "./MyUtilityFunction";
export default {
  methods: {
    MyUtilityFunction
  }
}

#vue.js #components #composition api #renderless components #vue