Vue js is becoming more and more popular every day. It has a community of great developers. Also, you can develop almost any types of a web application with Vue. Besides, The Vue.js is an open-source progressive JavaScript framework for building user interfaces. Vue can also function as a web application framework capable of powering advanced single-page applications. In this article, you will learn about Vuejs computed properties vs methods. Also, where should you use methods and where should you use computed properties.

Vuejs Computed Properties VS Methods

Firstly, I expect you know the basics of Vue and want’s to learn the differences between computed property and methods. So, we will discuss with clear and real-life examples.

You write the computed properties and methods almost in the same way. Let’s see an example and then we will explain it more.

[codepen_embed height=”432″ theme_id=”0″ slug_hash=”GOxPbN” default_tab=”js,result” user=”Hujjat”]See the Pen <a href=’https://codepen.io/Hujjat/pen/GOxPbN/’>GOxPbN</a> by Hujjat Nazari (<a href=’https://codepen.io/Hujjat’>@Hujjat</a>) on <a href=’https://codepen.io’>CodePen</a>.[/codepen_embed]

In the above example, we have a collection of tasks. Then, we display them based on completed and incompleted tasks. As you can see, we have once computed property and one method. They do almost the same thing but opposite to each other.

Return completed tasks:

  computed: {
    completedTasks() {
      return this.tasks.filter(task => task.completed);
    }
  }

Return Incompleted tasks:

methods: {
    InCompletedTasks() {
      return this.tasks.filter(task => !task.completed);
    }
  }

Note: As you can see, we could use computed property or methods for both. Instead, we put them in two ways so that you can understand that, what we can do with methods can be done with computed properties as well.

So, there are some significant difference and usage you should consider while using them.

Computed Properties

In a nutshell, computed properties are called computed value as well. It means, they update and can be changed anytime. Also, it caches the data until it changes. When the Vue is instantiated, computed properties are converted into a property. Therefore, you reference a computed property just like you would a data property.

Example:

var vm = new Vue({
  el: '#example',
  data: {
    message: 'Hello'
  },
  computed: {
    // a computed getter
    reversedMessage: function () {
      // `this` points to the vm instance
      return this.message.split('').reverse().join('')
    }
  }
})

You can use it like this.

<p>Original message: "{{ message }}" </p>
<p>Computed reversed message: "{{ reversedMessage }}"</p>

As you can see, the reverse message is not written like function. It’s just like a keyword. Additionally, you can’t pass a value to a computed property despite the fact that it’s like function.

Methods

You probably work with function a lot. Methods are the same as function and work the same way. Besides, a method does nothing unless you call it. Also, like all javascript functions, it accepts parameters and will be re-evaluated every time it’s called. After that, they can’t cache values. Additionally, you must use methods when you want to pass a value to modify it. 

Example:

[codepen_embed height=”305″ theme_id=”0″ slug_hash=”yPjjyg” default_tab=”html,result” user=”Hujjat”]See the Pen <a href=’https://codepen.io/Hujjat/pen/yPjjyg/’>Vuejs example for tutorial</a> by Hujjat Nazari (<a href=’https://codepen.io/Hujjat’>@Hujjat</a>) on <a href=’https://codepen.io’>CodePen</a>.[/codepen_embed]

As you can see. We can call it like a function and pass value. Then, you can change it or add something.

In a nutshell, if you want to pass value, methods are good. Otherwise, computed properties are better for cache and speed.

Conclusion

I hope the Vuejs computed properties VS methods compression has been informative for you. If you have any questions or suggestions, feel free to comment below. Besides, you can join our forum and ask questions frequently.

The post Vuejs Computed Properties vs Methods Comparison With Example appeared first on TECHNIG.

JavaScipt is by far the most popular programming language now. It will definitely rank in 2018. Also, you can almost develop anything with javascript. Web application, mobile, desktop and even work with a database. Besides, it has a large community of developers and contributors. Additionally, ES6 or ECMAScript 2015 is making the JavaScript better and better each day. So, we have collected the top best JavaScript Frameworks. If you want to learn any framework 2018, you may want to know which is the best, most popular and easy-to-use. Therefore, we collected these 5 best frameworks.

Furthermore, we show the resources that you can learn these frameworks in the best ways. Plus, we will compare them with Google trend to see the trending.

Best JavaScript Frameworks

Below are the lists of top JavaScript Frameworks that will rank in 2018. 

• Vue.js
• React
• Angular
• jQuery
• Redux

These frameworks are selected based on popularity on Github, most active users, eas of use, rich features and Google trends.

Notice: The above chart is the comparison of 5 best JavaScript frameworks on Google trend. In such a manner, you may not agree with it, but it’s the Google trend search terms. So, we don’t pay too much attention to that as well. What people search on Google doesn’t determine that it’s the best. Therefore, we order these frameworks more based on user-friendly, active users, updates plus most stars on Github.

Vue.js

The Vue.js is an open-source progressive JavaScript framework for building user interfaces. Vue can also function as a web application framework capable of powering advanced single-page applications. Besides, it has a lot of pre-made components. Also, one the strongest reason why it’s popular is Laravel Framework. By default, Laravel comes with Vue installed. That way, most Laravel user will use it. The second reason is that Vue become popular in a short time. It was released in early 2014.

Additionally, it has great documentation and many other learning resources. Also, at the time of writing this article, it has 73000+ Github stars. So, if you want to learn, start with documentation or free Laracast video series.

React

React is a JavaScript library for building user interfaces. Also, it is maintained by Facebook, Instagram and a community of individual developers and corporations. Besides, React allows developers to create large web-applications that use data with Single Page Application. The initial release was 2013 and the author was influenced by the Angular framework. The Github repo is very active and currently, it has over 80000 stars.

Since it’s built by Facebook, again there are countless numbers of resources to learn. So, the documentation is a great place to start. If you want free video, check Jeffrey Ways course on React here.

Angular

AngularJS is also on the list of top JavaScript frameworks. The AngularJS is a JavaScript-based open-source front-end web application framework mainly maintained by Google. Plus, a community of individuals and corporations to address many of the challenges encountered in developing single-page applications. So, AngularJS is the frontend part of the MEAN stack, consisting of MongoDB database, Express.js web application server framework, Angular.js itself, and Node.js server runtime environment. Also, the initial release was 2010. Though it has different versions, like angular 2, angular 4, they are almost the same. So, currently, it has over 57000+ star on Github.

Importantly, it has lots of resources for learning. If you want to learn it, start with W3schools. The second resource is learn-angular.org. Finally, if you like video, search on youtube. We could not find any complete free course.

jQuery

From a very long time, jQuery has been the most used JavaScript framework. Despite all other great frameworks nowadays, you can’t escape learning jQuery. It is a cross-platform JavaScript library designed to simplify the client-side scripting of HTML. Also, it is free, open-source software using the permissive MIT License. There are many JavaScript libraries that are based on jQuery. Therefore, you can’t stop learning. The initial release was 2006. Currently, it has over 47 stars on Github.

In Addition, since 2006, there have been countless numbers of blog articles and tutorials about jQuery. The best place to learn step by step is W3Schools.com. It’s not that complicated. very easy to learn and understandable even if you read the doc.

Redux

Redux is an open-source JavaScript library designed for managing application state. It is primarily (but not mandatorily) used together with React. Besides, Redux is a predictable state container for JavaScript apps. It helps developers write applications that behave consistently, run in different environments and are easy to test. Well, you may not need Redux. Before start using it, the article why you may not need it. But, definitely, it’s a great framework.

Want to learn about it? The documentation is a great place. Besides, the creator of Redux has a video tutorial as well. You can find it here.

Conclusion

So, we hope the article has been informative for you. Also, if you have any questions or suggestions about these top 5 best JavaScript Frameworks, feel free to comment below.

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