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Aleksey Kulikov alekseykulikov

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View .bash_profile
export PATH=/usr/local/bin:/usr/local/share/npm/bin:$PATH
PS1="\w \[\033[32m\]\$(parse_git_branch) \[\033[37m\]$\[\033[00m\] "
alias ll='ls -alFG'
# git aliases
alias ga='git add -A && gc'
alias gb='git branch'
alias gc='git commit -v'
alias gd='git diff'
alekseykulikov / .jshintrc
Last active Aug 29, 2015
My code style validation: ~/.jshintrc with atom's linter + linter-jshint
View .jshintrc
// validate code
"freeze": true, // prohibits overwriting prototypes
"unused": true,
"undef": true,
// relaxing options
"expr": true, // suppresses warnings about expressive expressions, like ?
"laxbreak": true, // allow line breaking
"lastsemic": true, // suppresses warnings about last missing semicolon
alekseykulikov / .jscsrc
Last active Aug 29, 2015
Code Style: ~/.jscsrc and atom's linter + linter-jscs
View .jscsrc
"preset": "node-style-guide",
"requireCamelCaseOrUpperCaseIdentifiers": "ignoreProperties", // for external APIs
"requireCapitalizedComments": null, // why???
"requireCurlyBraces": null, // allow one lines
"requireTrailingComma": null, optional
// personal style
"maximumLineLength": { // 80 is a goal, but sometimes it's necessary
"value": 120,
alekseykulikov / wrap-generator.js
Created Jul 1, 2015
Wrap koa-like generators to express-like callbacks.
View wrap-generator.js
var co = require('co')
* Wrap koa-like generators to express-like callbacks.
* @param {GeneratorFunction} fn
* @return {Function}
modules.exports = function wrap(fn) {
alekseykulikov / terminal.log
Last active Oct 24, 2015
Estimate production size of npm front-end package
View terminal.log
$ npm i -g browserify uglify-js pretty-bytes
$ npm i react
$ browserify node_modules/react | uglifyjs -m | gzip | wc -c | pretty-bytes
> 51.58 kB
$ npm i backbone jquery
$ browserify node_modules/backbone | uglifyjs -m | gzip | wc -c | pretty-bytes
> 41.99 kB
$ npm i
$ browserify node_modules/ | uglifyjs -m | gzip | wc -c | pretty-bytes
> 20.64 kB
alekseykulikov / index.js
Last active Dec 18, 2015
Use es6 generators to simplify async calls.
View index.js
* Required node >= v0.11.2
* usage: node --harmony index.js
var fs = require('fs');
var run = require('./run');
function readFile(filename) {
return fs.readFile.bind(fs, filename, 'utf-8');
alekseykulikov /
Last active Oct 30, 2017
lodash vs underscore size comprasion

In reply to Jeremy's tweet, that underscore is 3x smaller (simpler?) than Lodash!

Apparently, it's only true if you use <script> tag, but if you use lodash's module feature and build your project with browserify(or webpack) you get different numbers. In simple cases underscore can be 4-6 times bigger.

15020 bundle-lodash-without.js
 4820 bundle-lodash-without.min.js
 1647 bundle-lodash-without.min.js.gz
"userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/85.0.4161.0 Safari/537.36",
"environment": {
"networkUserAgent": "Mozilla/5.0 (Linux; Android 6.0.1; Moto G (4)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3963.0 Mobile Safari/537.36 Chrome-Lighthouse",
"hostUserAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/85.0.4161.0 Safari/537.36",
"benchmarkIndex": 1206
"lighthouseVersion": "6.0.0",
"fetchTime": "2020-05-31T13:08:20.759Z",
"requestedUrl": "",
alekseykulikov /
Last active Jul 30, 2020
Extra features of PageSpeed Insights API

In this article, I would like to share three features of PageSpeed Insights (PSI), that is not easy to find in the official documentation. I discovered them while hacking on the Lighthouse plugin and integrating PSI to

For a context, PSI is a simple yet powerful API by Google, that audits your page using Lighthouse and provides real-world users' data from Chrome UX Report (CrUX).

1. Audit many categories with one request

By default, PSI API returns only performance category. It's possible to pass ?category argument multiple times and get a report with many Lighthouse categories using one request (available categories: performance, accessibility, best-practices, seo, pwa).

curl -i "
alekseykulikov /
Last active Aug 8, 2020
Principles we use to write CSS for modern browsers

Recently CSS has got a lot of negativity. But I would like to defend it and show, that with good naming convention CSS works pretty well.

My 3 developers team has just developed React.js application with 7668 lines of CSS (and just 2 !important). During one year of development we had 0 issues with CSS. No refactoring typos, no style leaks, no performance problems, possibly, it is the most stable part of our application.

Here are main principles we use to write CSS for modern (IE11+) browsers: