Front End Web Developer

Float is used when you want to make an element of your page (usually an image) be pushed to the right or left and make other elements wrap around it.

This question may seem self-explanatory, but what you’re looking for is a developer who can demonstrate solid understanding of how data flows throughout the application. In two-way data binding, changes to the UI and changes to the model occur asynchronously—a change on one end is reflected on the other. In one-way data binding, data only flows one way, and any changes that the user makes to the view will not be reflected in the model until the two are synced. Angular makes implementing two-way binding a snap, whereas React would be your framework of choice for deterministic one-way data flow.

JavaScript is read line by line. Sometimes, this can result in what seems like a subsequent line of code being executed prior to an earlier line of code. A callback function is used to prevent this from happening, because it is not called until the previous line of code has fully executed.

JSONP is JSON with padding.

Prototype-based inheritance allows you to create new objects with a single operator; class-based inheritance allows you to create new objects through instantiation. Prototypes are more concrete than classes, as they are examples of objects rather than descriptions of format and instantiation.

Prototypes are important in JavaScript because JavaScript does not have classical inheritance based on classes; all inheritances happen through prototypes. If the JavaScript runtime can't find an object's property, it looks to the object's prototype, and continues up the prototype chain until the property is found.

In a website, front-end is the part that users accesses while interacting with the website including images, buttons, colours, animations, forms, typography etc.

While the frontend developer is a programmer that codes the front end of a website and ensures that a visibility of site remains same throughout different web browsers.

The MEAN (MongoDB, Express, AngularJS, and Node.js) stack is the most popular open-source JavaScript software stack available for building dynamic web apps—the primary advantage being that you can write both the server-side and client-side halves of the web project entirely in JavaScript. Even if you aren’t intending to use MEAN for your project, you can still learn a lot about the developer when they recount their experiences using JavaScript for different aspects of web development.

WebGL:

☛ WebGL allows you to control the GPU in more direct way

☛ It is more an “immediate mode”

☛ It does not have additional support for text, for shaders built, for picking, etc.

Three.js:

☛ Three.js is built on top of WebGL and allows you to take care of lot of things like what objects to draw each frame

☛ It is more a “retained mode”

☛ It does have an additional support for text, for picking, for object hierarchy, etc.

A image sprite is a collection of images put into one single image.

Using css positioning you can show and hide different parts of the sprite depending on what you need.

Sprites reduces the number of http requsts thus reducing load time of page and bandwidth

Buy Buttons using Sprite as background:

Both buttons use the same background image. The only difference is in the positioning.

This can be tricky and the best way to keep in your head is to memorise because if you try to relate javascript null to other languages, it will get more confusing.

In javascript, null is an object with no value and undefined is a type.

typeof null; // "object"

typeof undefined; // "undefined"

var a;

var b = null;

a == b; // "true" because their values are the same

a === b; // "false". they have different types

REST stands for Representational State Transfer, an architectural style that has largely been adopted as a best practice for building web and mobile applications. RESTful services are designed to be lightweight, easy to maintain, and scaleable. They are typically based on the HTTP protocol, make explicit use of HTTP methods (GET, POST, PUT, DELETE), are stateless, use intuitive URIs, and transfer XML/JSON data between the server and the client.

Anonymous functions are functions without a name. They are stored in a variable and are automatically invoked (called) using the variable name.

var x = function(a, b) {

console.log(a * b)

}

x(3, 5); // 15

The skills required for the Front End Developer includes

☛ HTML

☛ CSS

☛ JavaScript

☛ JQuery

Additional Skills

Some additional skills that might be helpful will be

☛ Knowledge of cross browser testing

☛ Knowledge of CMS like WordPress, Joomla or Drupal

☛ Knowledge of PHP and OOP’s ( object oriented programming)

☛ Knowledge of SEO, and tools like Flash and Dreamweaver

Experienced coders won’t just be able to rave about their favorite language’s strengths—they will also be able to talk about its weaknesses. JavaScript’s main weakness is security. Look for answers on how it can be exploited. A secondary weakness is JavaScript’s ubiquity and versatility—it can be a double-edged sword in that there’s a lot of room for programming quirks that can lead to inconsistent performance across different platforms.

You can tell a lot about a programmer from the frameworks they’re familiar with—AngularJS, React, jQuery, Backbone, Aurelia, and Meteor are just some of the more popular ones available. The key here is to make sure the developer you’re engaging has experience with the framework you’ve chosen for your project.

Event bubbling causes all events in the child nodes to be automatically passed to its parent nodes. The benefit of this method is speed because the code only needs to traverse the DOM tree once.

A great question to feel out the depth of the applicants knowledge and experience.

A web application is an application utilizing web and [web] browser technologies to accomplish one or more tasks over a network, typically through a [web] browser.