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Alex Ilyaev alexilyaev

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alexilyaev /
Last active May 23, 2021
Checking out StackBlitz Web Containers

StackBlitz - Introducing WebContainers: Run Node.js natively in your browser

Good Things

  • Really easy to start up a new project and play around with it locally (like in CodeSandbox, but supports Node.js as well).
    • Turns out CodeSandbox have an experimental support for Node.js projects as well 😳 I don't know if they run it locally or remotely, and you can't clone and existing Node repo and run it.
  • Can connect to any repo on GitHub and play around with the code (if the Node.js version matches):
    • If it's my repo, I can directly commit to it. That's actually nice, cause it could be a very fast workflow for quick changes.
  • Can run on a Tablet or Chromebook.

Configs + Environment Variables



  • Very simple to setup.
  • Automatically assigns configured values on top of process.env.
  • Automatically supports overriding configured values via Environment Variables.
  • Promotes best practices (FAQ):


A really nice tool to manage the different Node.js/npm/yarn versions between projects:

The problems it solves

  • Making sure everyone who works on the project uses the same Node.js/npm/yarn version for consistent dependencies tree and Node.js execution.
  • Switching the Node.js version when jumping between projects.

Style Guides


  • Avoid using any as much as possible.
    • If you want a type meaning "any object", use Record<string, unknown> instead.
  • If you want a type meaning "any value", you probably want unknown instead.
alexilyaev /
Last active May 16, 2022
CSS in JS - Emotion Guidelines


This repo uses a CSS-in-JS library called Emotion for its styling.

Why Emotion?

Emotion is a performant and flexible CSS-in-JS library. Building on many other CSS-in-JS libraries, it allows us to style apps quickly with string or object styles. It has predictable composition to avoid specificity issues in CSS. With source maps and labels, Emotion has a great developer experience and performance with heavy caching in production.

Also, Material UI v5 will most likely use Emotion instead of JSS:
material-ui - [RFC] v5 styling solution

alexilyaev /
Created Dec 10, 2020
CSS Styling Guidelines

CSS Styling Guidelines

  • Use rem units for font-size and line-height.
    • The user preferences are respected.
    • We can change the apparent px value of rem to whatever we'd like.
  • Use px, % or vw for layout purposes.
    • For example, when using margin, padding, width, height, etc.
    • Easier to implement design requirements.
    • Why not rem here as well?
  • Layout can break when changing the base browser font-size.

trailingComma: es5 (default)

When set to none...

  • Often forgetting to add a comma when adding entries to an Object.
  • Commenting a property in an object currently removes the comma from the property above it.
  • Moving the last property of an object up requires an extra step to add a comma at the end.
  • Messes up Git diff and sometimes creates conflicts.
alexilyaev /
Last active Dec 10, 2020
React Folder Structure Ideas

React Folder Structure Ideas

Suggested structure

alexilyaev / user-settings.json
Last active May 8, 2022
VS Code Common Settings
View user-settings.json
"[html]": {
"editor.defaultFormatter": "esbenp.prettier-vscode"
"[javascript]": {
"editor.defaultFormatter": "esbenp.prettier-vscode"
"[javascriptreact]": {
"editor.defaultFormatter": "esbenp.prettier-vscode"