Hire freelance web developer how to#
If the front-end developer you’re considering doesn’t know how to use CSS transforming tools, you can expect bloated style sheets with compatibility issues that take longer to fix.ĢD and 3D graphics. While experience isn’t strictly required, it does indicate that a developer is staying current in ways that boost their productivity. Its plugins allow the use of CSS preprocessors along with other task runners for analyzing and optimizing style sheets. This can avoid issues in production.ĬSS by itself has limited capabilities for creating optimized style sheets, but CSS preprocessors such as LESS, Sass/SCSS, or Stylus provide a more advanced way of writing style sheets and compiling them into CSS.Īnother category of CSS transforming tools are those like PostCSS. Front-end developers should also know how to create valid cross-browser and mobile compatible style sheets effectively. UI frameworks allow for reusing already-created UI elements with defined style guides, compatible with desktop browsers and mobile devices.ĭevelopers can use lightweight UI frameworks for setting up a grid system for the whole layout or more robust frameworks for including various UI elements.Ī good front-end developer will know when to use UI frameworks, which are helpful especially for rapid prototyping.ĬSS-transforming tools. Many times, front-end developers don’t need to build UI elements from scratch. (Even if you don’t, your users may try it anyway.) Front-end developers need to know how to build and optimize web applications for so they are flexible when it comes to screen sizes, ratios, and orientations. If we want to allow using web applications in mobile devices, the UI should adapt to mobile device environments.
UI developers should know how to avoid and solve compatibility issues across web browsers. There are myriad web browsers and versions of them, and each supports different features and versions of HTML, CSS, and JavaScript. This shows they generally know how to use UI frameworks and reuse UI elements.Ĭross-browser compatibility. However, candidates should know how to use additional JavaScript libraries such as jQuery or Ext JS. There isn’t always a need for adding JavaScript libraries to projects. Use of the JavaScript language is fundamental for all front-end developers in order to make web pages interactive.įront-end developers often use JavaScript libraries to develop UI widgets, components, and effects in the form of plugins. Front-end developers should know HTML5 and CSS3-which have been the standard versions for a while now-and know when to use their more recent features.
These are the standard building blocks that web browsers interpret and present as visual UI elements. All front-end developers have to understand web markup (HTML) and cascading style sheets (CSS). For this category of web applications, front-end developers need to know: Such sites are still made of web pages that can contain animations and many graphic elements, but there is far less (custom) JavaScript normally involved. The simpler and older of the two styles, this is used in apps like Gmail’s “Basic HTML” version and in most traditional web forums. So how can you know what’s important when it comes to hiring front-end developers?īased on the project and what kind of user interface you want to provide, we can split up the front-end development skill set into two main areas: UI and front-end JavaScript. The general knowledge and skill set has also broadened, with many technologies being used across specializations. Within that, there are many more specific specializations, and new ones are appearing all the time. It’s used in multiple programming paradigms and represents its own specialization of front-end development, separate from HTML and CSS. At that point, JavaScript represented a set of basic functions for real-time web page modifications, allowing for animating UI elements and making them more interactive.īut now JavaScript, development is more complex. They have also spread to new contexts, like mobile, wearables, and cars.įront-end developers once easily mastered the three main technologies: HTML, CSS, and JavaScript. Over time, web user interfaces (UIs) have become more interactive. If we want to provide an engaging experience to our users, hiring good front-end developers is key. (In most cases, front-end development refers particularly to web applications as interpreted by a user’s browser.) Front-end developers are responsible for building the parts of applications that users see and interact with.
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