30 Apr

How To Hire a jQuery Developer in 2018

If you hire a jQuery developer, you can significantly simplify web development. As an open-source JavaScript library, it was explicitly designed to help make specific JavaScript tasks less complicated and time-consuming, although the library does require some extra overhead.

This library isn’t always smarter to use than JavaScript, so you have to be sure to hire a jQuery developer who is genuinely an expert to make both the development and the web page itself fast, functional, and efficient.

Before you find a jQuery developer to hire, you first have to understand the benefits and drawbacks of this library.

 

It’s simple and fast

jQuery itself is relatively simple to learn for many developers; however, this doesn’t mean that you can hire any developer to build your web pages.

Beyond being more straightforward, jQuery gives developer many different options to make their website load quicker, such as only loading div tags when necessary, and the files are smaller. Additionally, these files are typically stored separately from the Web page so your jQuery developer can modify the whole site from a central repository.

While the library is built on shorter, more straightforward code, developers who aren’t experts in both JavaScript and jQuery could make the page slower or take longer to complete the required code. However, if you hire a jQuery developer who knows the language and library well, they can significantly simplify the code and shorten deployment time while still creating a beautiful and functional site.

 

Open source and large community

jQuery is one of the most popular JavaScript libraries available and has been for many years now. This vast community is also open source, which means that there is an extensive library with a substantial number of plugins and debugging tools developed to help you with almost any programming task possible.

If you hire a jQuery developer with our help, you can be confident that they’re an expert. However, even experts can have questions sometimes. There is an almost unlimited amount of tutorials for developing tasks, tools, and plugins, and people are always available to answer questions on sites like Stack Overflow.

 

You can make your webpage slower with jQuery

While the benefits of this library are shorter, faster code that delivers great results and a huge amount of plugins to help you easily accomplish your desired result, one potential downfall of it is that it’s relatively simple to write inefficient code in jQuery.

Some new developers first adapted jQuery without spending much time to learn JavaScript, HTML, and CSS, which means that they lean on jQuery and its large community for everything, even if jQuery is the slower option.

Another problem comes in when new jQuery developers use every plugin that could solve their problem, without thinking about the code running slower with so many different extensions. Thus, while the code can still technically be written well and concisely, the web page’s performance could suffer.

The good news with the downfall though is that it’s all straightforward to avoid: be sure that you hire a jQuery developer who is an expert. To help you find the best coder for your projects, we’ve compiled some jQuery interview questions.

 

Best jQuery Interview Questions of 2017

Explain $() in the jQuery library

This is an elementary, common function used within jQuery, so your potential employee should certainly know what it means. Essentially, $() is used to wrap any object into a jQuery object. The reason this is important is that, from here, you can then call different method defined jQuery objects.

Although this question is basic, it helps prove if the developer who you’re interviewing truly knows jQuery.

 

How can you select each <div> element in your page using jQuery?

If you want to hire a jQuery developer, they should be well versed in the selectors supported in jQuery, such as the ID selector, class selector, and tag selector. If you only give your future coder the information in this question, they should know to use a tag selector to select each div element.

The simple code $(“div”) will return a jQuery object that contains all of the div tags on the page.

 

How can you create a clone of any object with jQuery?

jQuery provides a clone() method that copies all matched elements in addition to all of their descendant elements and text nodes (also referred to as a deep copy).

Check out this example of the code required to clone an object using jQuery:

$(document).ready(function() {

$(‘#btnClone’).click(function() {

$(‘#dvText’).clone().appendTo(‘body’);

return false;

});

});

How do you attach an event to an element that should be executed only once?

This is possible via the jQuery one() method by attaching a handler to an event for the given element. The handler is then executed a maximum of one time per element, meaning that the related function is only called once.

Here’s some example code to better check to make sure your interviewee understands this question:

$(document).ready(function() {

$(“btnDummy”).one(“click”, function() {

alert(“This will be displayed only once.”);

});

});

Explain the $(document).ready() function and when you should use it

This question is another important one that interviewers should ask before they hire a jQuery developer. Essentially, ready() executes code once the document can be manipulated. Using the ready() function with jQuery, your code can be executed only when the DOM is fully loaded and ready.

This should function in all browsers, as jQuery takes care of the problems of cross browser execution for you. Here’s an example of this code:

$(document).ready(function() {

console.log(“ready!”);

});

For a more detailed explanation, take a look at this webpage.

 

Name some of the most common methods used to get and set information about elements and one code example changing the innerHTML or attribute of an element

While there are many different ways to change an existing element, this question focuses on changing the innerHTML or attribute of an element because it is one of the most common and essential to know.

 

Below are some of the most common methods to get and set information about elements:

.html() – Get or set the HTML contents.

.text() – Get or set the text contents; HTML will be stripped.

.attr() – Get or set the value of the provided attribute.

.width() – Get or set the width in pixels of the first element in the selection as an integer.

.height() – Get or set the height in pixels of the first element in the selection as an integer.

.position() – Get an object with position information for the first element in the selection, relative to its first positioned ancestor. This is a getter only.

.val() – Get or set the value of form elements.

 

While it might seem trivial to change things about elements, your potential developer needs to know that the change affects all elements in the selection. If they only want to change one element, it has to be specified. Here’s an example of changing the HTML of one element:

$(“#myDiv p:first”).html(“New <strong>first</strong> paragraph!”);

 

Hire a jQuery Developer

Now, you know why you would want to hire a jQuery developer as well as the most important interview questions to ask them to see that they truly understand the language. If you’re going to make sure you have a guaranteed expert without any of the hard work, contact us, and we’ll find you a well-vetted jQuery developer who is an excellent addition to your team.

Hey You!

Learn more about remote recruitment by having our top blog posts delivered straight to your inbox!

Drop your name and email below.

 

By inserting your email above, you confirm that you've read and agree with our privacy policy.

Please check your Email to confirm subscription