Top 20 Frontend Interview Questions With Answers

• webpack

  333 64,232 9.8 JavaScript

  A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows for loading parts of the application on demand. Through "loaders", modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.

  

Webpack is a module bundler, the main purpose of which is to bundle JavaScript files to make them usable in a browser.

• i18next

  61 7,469 9.2 JavaScript

  i18next: learn once - translate everywhere

  

The best way to implement internationalization is to use an internationalization framework library, such as i18next. With this kind of library, you can easily handle translations and automatically display your frontend labels in the user's language. The frontend application also needs to be flexible and easily configurable so that its layout can change accordingly, reading from left to right or right to left. CSS allows this with the rtl and ltr CSS direction property.

• SurveyJS

  surveyjs.io featured

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

• web-vitals

  140 7,206 7.6 JavaScript

  Essential metrics for a healthy site.

  

Google Core Vitals now represent the most important metrics to focus on when it comes to technical SEO. Google Core Vitals are a set of standardized metrics that Google uses to evaluate the user experience offered by a web page and assign it a technical SEO grade. Several tools exist to measure and report technical SEO performance, but the most reliable is Google Lighthouse.

• Sass

  202 14,943 8.9 TypeScript

  Sass makes CSS fun!

  

CSS stands for Cascading Style Sheets, and is a scripting language used to style web pages. SCSS stands for Syntactically Awesome Style Sheet, and is a superset of CSS. You can think of SCSS as the more advanced version of CSS, which comes with several features that CSS does not support, such as the SCSS nested syntax, as shown below.

• lodash

  189 59,045 4.8 JavaScript

  A modern JavaScript utility library delivering modularity, performance, & extras.

  

It's also important to ensure that you're importing libraries correctly, so webpack can perform tree shaking effectively. For example, let's import lodash, as follows:

• react-buddy-react

  20 0 0.0 JavaScript

  A declarative, efficient, and flexible JavaScript library for building user interfaces.

  

When dealing with frontend libraries or frameworks such as React, using the Fullscreen API directly may be difficult because of the way the framework handles the DOM. In scenarios like this, you can opt for an external library, such as react-full-screen, to handle full-screen logic. This enables you to elegantly implement full-screen functionality on a React component.

• lighthouse

  153 27,916 9.5 JavaScript

  Automated auditing, performance metrics, and best practices for the web.

  

Google Core Vitals now represent the most important metrics to focus on when it comes to technical SEO. Google Core Vitals are a set of standardized metrics that Google uses to evaluate the user experience offered by a web page and assign it a technical SEO grade. Several tools exist to measure and report technical SEO performance, but the most reliable is Google Lighthouse.

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

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