HTML/CSS and React Online Test
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Sign Up To Use This TestThe HTML/CSS and React online test assesses candidates' knowledge of HTML, CSS, and React as well as their ability to leverage commonly used programming patterns.
It's an ideal test for pre-employment screening. A good front-end developer should be able to utilize all these technologies to create a modern, dynamic, and interactive user interface.
This online test requires candidates to solve common HTML/CSS challenges as well as React coding problems.
Recommended Job Roles
JavaScript Developer
React Developer
UI/UX Developer
Web Front-End Developer
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Sample Free Questions
Avatar
7min
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Easy
Easy
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CODE
HTML/CSS
Borders
Element size
Styling
Public
HTML/CSS
HTML is the standard markup language for creating web pages. It's an essential skill for anyone creating web pages of any complexity.
Borders
Borders can be applied to most HTML elements within the body. This is one of the most used element decorations.
Element size
Setting the size of the elements on a web page is one of the basic things that any web developer or designer should know.
Styling
Styling user interfaces according to the specification is a daily routine for a front-end developer.
Public
Public questions (free account) are common interview questions. They are great for practicing, or if you want to filter candidates using the classic problems.
Every user on your website has an image avatar that is displayed when they post a comment. You want to style these images differently from other images on your site. Add a CSS class named avatar that fulfils the following requirements:
- The avatar's border is rounded, so that it appears as a circle.
- The avatar's width and height are both 150px.
- The avatar has a solid border, has a width of 2px, and be colored gray.
For example, the avatar in the template should look like:
Semantics
7min
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Easy
Easy
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CODE
HTML/CSS
Elements and attributes
HTML5
Semantic tags
Public
HTML/CSS
HTML is the standard markup language for creating web pages. It's an essential skill for anyone creating web pages of any complexity.
Elements and attributes
Defining elements and their attributes is the first process in creating an HTML page.
HTML5
HTML5 is now supported in all modern browsers, making it important for front-end developers to know how to use its features.
Semantic tags
Semantic HTML elements clearly describe their meaning in a human and machine readable way. They are used to improve page SEO.
Public
Public questions (free account) are common interview questions. They are great for practicing, or if you want to filter candidates using the classic problems.
Update the website's HTML, without using JavaScript or CSS, to make use of semantic elements so that:
- The classless outer div element is replaced with a more appropriate element.
- The divs with the image and caption classes are replaced with self-contained content elements.
- The divs with the lorem-ipsum and description classes are replaced with elements, so that by default only the contents of the description element are shown. When the contents of the description element are clicked, the visibility of the rest of the lorem-ipsum element is toggled.
Toggle Message
10min
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Easy
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CODE
React
Conditional rendering
Event handling
Managing state
Public
New
React
React is a JavaScript library for building user interfaces. As one of the most widely used frameworks it's important for most JavaScript developers to have a working knowledge of.
Conditional rendering
Conditional rendering in React is rendering different components depending on the application state. It is commonly used and, as such, is important for all developers.
Event handling
Event-based design patterns are very common in modern applications, especially in the development of user interfaces.
Managing state
Knowing how to overcome statelessness, the intrinsic limitation of web programming, is a very important skill for a web developer.
Public
Public questions (free account) are common interview questions. They are great for practicing, or if you want to filter candidates using the classic problems.
New
This is a new addition to our question library.
The Message component contains an anchor element and a paragraph below the anchor. Rendering of the paragraph should be toggled by clicking on the anchor element using the following logic:
- At the start, the paragraph should not be rendered.
- After a click, the paragraph should be rendered.
- After another click, the paragraph should not be rendered.
Finish the Message component by implementing this logic.
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Questions
Links, Tab Strip, Contact Form, Email Form, Background Wrapper, Toggle Options Visibility, Ad, Addition, Article Style, Baby Names, Blog, Bookmark, Christmas Tree, Cities, Editor, Format Table, iframe, Keywords, Label Color, Link, Loading, Logo, Screen Reader, Share Button, Shirts, TestDome Logo, Timesheet, Upload, Warehouse, Widgets, Player Status, Simple Calculator, Theme Context Switcher, Data Entry, Email Tables, Tooltip Component, Shopping List, Ice Cream Flavors, Reorder, Error Catcher, Details, List Wrapper, Cards Widget, Product Rating, Breakfast Menu, Post CommentSkills
HTML/CSSHTML/CSS
HTML is the standard markup language for creating web pages. It's an essential skill for anyone creating web pages of any complexity.
CSS selectors
Selectors are a programming pattern that can be used to select an element from a container. They are primarily used in technologies such as CSS and jQuery to apply styles to groups of elements.
Styling
Styling user interfaces according to the specification is a daily routine for a front-end developer.
React
React is a JavaScript library for building user interfaces. As one of the most widely used frameworks it's important for most JavaScript developers to have a working knowledge of.
Components
Components are used in many frameworks and languages as the building blocks of an application.
Conditional rendering
Conditional rendering in React is rendering different components depending on the application state. It is commonly used and, as such, is important for all developers.
VDOM
Many modern web frameworks provide a virtual DOM that can be used to improve performance and maintainability of large web applications - as such, it's important for web developers to have a solid understanding of how to interact with both the VDOM and DOM.
Data binding
Data binding is a technique for synchronizing data between a component and DOM. For this reason, it’s important for all web developers.
Element spacing
Setting the margins and padding of the elements on a web page is one of the basic things that any web developer or designer should know.
CSS advanced
Cascading Style Sheets are the styling language of the web. Knowledge about advanced CSS features is required for seasoned front-end developers.
Element size
Setting the size of the elements on a web page is one of the basic things that any web developer or designer should know.
Flexbox
The Flexible Box Layout Module makes it easier to design a flexible responsive layout structure.
Positioning
Dynamic positioning of user interface elements depending on resolution is more important than ever in modern applications, making this important for a front-end developer.
Elements and attributes
Defining elements and their attributes is the first process in creating an HTML page.
HTML5
HTML5 is now supported in all modern browsers, making it important for front-end developers to know how to use its features.
Semantic tags
HTML5 introduced semantic tags, which can greatly improve the level of automated analysis that can be done on documents, as well as improve the readability of HTML.
Bookmarks
A bookmark is a hyperlink that points to a location within a document, which is defined by a name that is assigned to an element. Bookmarks are used when we need to jump to a specific location within a document.
Fonts
Setting the font name or size is part of creating any web page.
Hyperlink
Hyperlink, or simply a link, is a reference to data that the reader can follow by clicking or tapping. There's no web page without a hyperlink.
IFrame
The HTML Inline Frame element (iframe) represents a nested browsing context, embedding another HTML page into the current one. Web developers often use it to display content within other content.
Language
A programmer should use a language as a tool, always taking advantage of language-specific data types and built-in functions.
Animation
Animation is the process in which images or objects are manipulated to appear as if they are moving. It's a powerful effect that is important for UI designers to understand and be able to use.
Accessibility
Accessibility refers to the design of products, devices, services, or environments for people who experience disabilities. It's important for all designers and developers to know how to optimize for people who experience disabilities.
Forms
Forms provide a method of grouping inputs and collecting user data. As such, they are important for all front end developers.
CSS layout
Cascading Style Sheets are the styling language of the web. For a front-end developer, a knowledge of CSS layouts is required.
Tables
A table stores data as rows and columns. From databases to HTML layouts, as a data structure they are ubiquitous. They are an important structure for developers to understand and know how to use.
Effect Hook
Using a React Effect Hook allows you to set up a subscription to DOM changes and perform side effects.
State Hook
Using a React State Hook allows you to preserve state between re-renders in a manner that doesn't require render props and higher-order components patterns, which simplifies code.
Hooks
Many frameworks allow developers to add their own plugins and extensions. Hooks are the points within the framework that the developer can access to implement their own logic and designs.
Reducer Hook
Using a React Reducer Hook allows you to pass callbacks with values between components, which simplifies code by removing the need to pass callbacks through every level of a component tree.
Context
React Context provides a way to pass data without using props through every level of the tree.
Borders
Borders can be applied to most HTML elements within the body. This is one of the most used element decorations.
Inline styles
Inline styles are styles that are applied directly on elements. This is one of the ways for applying styles and for some scenarios, such as for email, is the only supported way.
Portals
Portals are a first-class way to render children into a DOM node that exists outside the DOM hierarchy of the parent component. As such, they are a very convenient tool for all developers who need to interact with a virtual DOM.
Managing state
Knowing how to overcome statelessness, the intrinsic limitation of web programming, is a very important skill for a web developer.
Responsive design
Anyone who works with web should know how to properly implement responsive web design that makes web pages render well on a variety of devices and screen sizes.
Event handling
Event-based design patterns are very common in modern applications, especially in the development of user interfaces.
Error boundaries
Error boundaries are React components that catch JavaScript errors anywhere in their child component tree and display a fallback UI instead of the component tree that crashed. Since they are one of the basic building blocks of error handling, they are important for all React developers.
Higher order components
A higher-order component (HOC) is an advanced technique in React for reusing component logic. HOCs are not part of the React API, they are a pattern that emerges from React’s compositional nature.
Selectors
Selectors are a programming pattern that can be used to select an element from a container. They are primarily used in technologies such as CSS and jQuery to apply styles to groups of elements.
Content manipulation
Adding or modifying content is the most common task when developing dynamic web pages.
Score Distribution
# of candidates
| 0-33% | |
|---|---|
| 34-66% | |
| 67-100% |
Score