Category Archives: javascript

Front-end interview questions with answers

Yeap, yet another one. That’s what it has now: Table of Contents

React. Benchmarking and optimizing performance

There is a tool called react-addons-perf that should be imported into your project.

After that you can use Perf object in your console. It can tell you about your react performance issues, not including redux. For instance, you can check unnecessary renders or unnecessary change calculations:

Here’s more on that — And …

Read more

MVC vs Flux

They are all architecture patterns. M is for model. It stores generic logic for the model like fields and calculations based on the fields like validation and stuff. V is for view. It just renders stuff and passes user interactions (events) to its controller via the controller’s API. C is for controller that ties models …

Read more

Publish subdirectory of a project to gh-pages

If your build is located at ./build, then do this:

More details here —

Testing react’s dom with jest and enzyme

Install it like this:

Regression testing of react app with jest

Example is here — The main idea is this:

How to handle js errors in your react app In russian —

Yet another article about js-interview In russian —

React component lifecycle methods

Flow of lifecycle methods I checked it with react 16.2.0. On a client When component is rendered for the first time

Javascript mocking frameworks

Classical one — TestDouble — There is a good video on using TestDouble from it’s creator: