• Origin story: Evan wanted to learn from Angular and React and make a lighter framework for rapid prototyping. So, he used features that he liked about Angular like declarative data binding and built VueJS in 2013. In 2014, he released it as an actual project on Github and sent a link to Hacker News. To his surprise, VueJS got voted on the front page and also got several hundred stars in the first week itself.
• Widely popular: According to Monterails’ survey on VueJS in 2018, around 75% of the respondents agreed that the ease of integration is the biggest advantage of VueJS. Over 92% of respondents said they’d use VueJS again for their next project and 58% decided to add VueJS to their tech stack because it’s a pretty easy framework to start with.
• Other trivia: VueJS has more stars on Github(130494) as compared to React.js(124251).

• Gentle Learning Curve: VueJS is one of the easiest frameworks to learn and master. All one needs is a few lines of JavaScript and a hint of HTML. Consequently, recruiting VueJS experts is also less expensive.
• Best of both worlds(AngularJS and ReactJS): As mentioned earlier, Evan You, the creator of VueJS, extracted the best features of Angular.js and built VueJS. Although VueJS was made to address shortcomings of Angular, it is a combination of the best features of both, Angular.js and React.js.

Here are some of the tools used by VueJS developers:

1. Vue CLI

Vue CLI is a command-line interface tool that gives all the necessary items for VueJS development. It supports an array of development tools and comes with a GUI through which you can prototype a VueJS app quickly.

2. Vue Starter

This is a boilerplate for apps that are production-ready. Using the Vue Starter tool, VueJS developers can start from an already established codebase and be ensured of optimal performance.

3. VueJS DevTools for Chrome and Firefox

The VueJS DevTools is an extension that you can install on Chrome or Firefox and test and debug your application in the browser. It allows you to inspect various components with ease.

4. Storybook

Storybook is a UI development tool for the development and testing of apps with ease. It works well with various JavaScript frameworks including VueJS. You can create your own component library using Storybook, as a story sequence.

5. VuePack

This is a starter kit for VueJS development which is easy to use and allows you to pick out the components that you need. You can then download these as a minified JS file. The tool contains a number of VueJS components that are used in most apps.

Below are some key points that we at Flexiple have learned through trial and error - a process of filtering through over 15,000 developers. You can use these in your process to hire VueJS developers.

• Years of software development experience: Be specific about the technology you’re looking for and the number of years of experience needed. A proxy to years of experience can be the number of production-level apps worked on.
• Based on the type of product you are trying to build - social network, SAAS product, etc. - you can prioritize certain developers over others.
• Exposure to specific industries: Developers who have built products in certain industries will already know key aspects of laying the foundation for a great product and will be able to predict possible problems.
• Experience working remotely: A developer with past remote work experience is an added advantage as they would have first-hand experience of everything - right from how contracts work to streamlined communication, as well as timelines and deliverables.
• Strong communication: An essential thing to look at when hiring a freelancer is excellent communication skills. Since all the interaction happens online, a freelancer should be able to effectively communicate to ensure a streamlined execution of all work.

Now that you have made a quality JD, it can still be tricky to evaluate the skills of your applicants when you hire VueJS developers. To help you with that, we have created a pool of questions that a good VueJS developer should be comfortable with.

It is important to note that the ability to answer these questions doesn't imply that you have a top-quality candidate. But it definitely is a big step in that direction. You can also check out some more interview questions on this page.

To help you navigate through these questions, we’ve categorized the interview questions in 3 parts:

A. Basic concepts: Includes all basic concepts used across languages but we've focused on their significance in VueJS. This will give you an understanding of how strong their programming foundation is.

B. Advanced concepts: Includes all concepts that someone with higher expertise should know.

C. DS/Algorithm questions: To test the logical capability of the candidate.

A. Basic concepts

Coming soon!

B. Advanced concepts

Coming soon!

C. Data Structure/ Algorithm

1. Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct order. Note that an empty string is also considered valid.

class ValidParenthesesF {
    func isValid(_ s: String) -> Bool {
        var stg = [Character]()

        for char in s {
            if char == "(" || char == "[" || char == "{" {
                stg.append(char)
            } else if char == ")" {
                guard stg.count != 0 && stg.removeLast() == "(" else {
                    return false
                }
            } else if char == "]" {
                guard stg.count != 0 && stg.removeLast() == "[" else {
                    return false
                }
            } else if char == "}" {
                guard stg.count != 0 && stg.removeLast() == "{" else {
                    return false
                }
            }
        }
        return stg.isEmpty
    }
}

The above code will input 0(false). 

2. What will the output of the following code be?

var i = 10;
var f = 5;
var g = 3;
if (i / f / g)
     document.write("hi");
else
    document.write("hello");

a) hi
b) hello
c) error
d) no output

The answer is A because the floating-point division returns a non zero value = 0.66 which evaluates
to true and outputs ‘hi’.

3. What will the output of the following code be?

var p = 2;
var q = 4;
var r = 6;
if (p > q > r)
     document.write("true");
else
    document.write("false");

The answer is False. It may look like the output can be true because 6 > 4 > 2 is true, but PHP evaluates $z > $y 
first, which returns a boolean value of 1 or true. This value (true or 1) is compared to the 
next integer in the chain, bool(1) > $z, which will result in NULL and echo “false.”

Lastly, to quickly summarize the process of hiring a VueJS developer for you:

• Note your project requirements and hire accordingly. Do not go for the lowest or the highest-paid developer.
• Don’t hire without vetting- consider asking questions right from the basics to advanced to logical questions.
• Look for companies like Flexiple that help you find the perfect fit.

That is everything you need to know to hire VueJS developers. Happy hiring! :)