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@praveenpuglia
praveenpuglia / shadow-dom.md
Last active March 9, 2026 14:39
Everything you need to know about Shadow DOM

I am moving this gist to a github repo so more people can contribute to it. Also, it makes it easier for me to version control.

Please go to - https://github.com/praveenpuglia/shadow-dom-in-depth for latest version of this document. Also, if you find the document useful, please shower your love, go ⭐️ it. :)

Shadow DOM

Heads Up! It's all about the V1 Spec.

In a nutshell, Shadow DOM enables local scoping for HTML & CSS.

@jcreamer898
jcreamer898 / react-lifecycle.md
Last active May 21, 2018 10:37
Name of thing Sorta like... Mounted? Can you even setState? What would you say... ya do here?
constructor initialize() nope nope init stuff NO side effects
componentWillMount beforeDomReady() nope yeah but don't Only needed in createClass now use constructor for most things
render render nope please no render stuff and don't set any state please
componentDidMount domReady() yup yup DOM is a go init jQuery plugins dispatch stuff
componentWillReceiveProps onChange() yup yup
@bvaughn
bvaughn / react-lifecycle-cheatsheet.md
Last active January 4, 2026 21:31
React lifecycle cheatsheet

React lifecycle cheatsheet

Method Side effects1 State updates2 Example uses
Mounting
componentWillMount ✓ Constructor equivalent for createClass
render Create and return element(s)
componentDidMount ✓ ✓ DOM manipulations, network requests, etc.
Updating
componentWillReceiveProps ✓ Update state based on changed props
@wojteklu
wojteklu / clean_code.md
Last active March 19, 2026 21:26
Summary of 'Clean code' by Robert C. Martin

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

  1. Follow standard conventions.
  2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
  3. Boy scout rule. Leave the campground cleaner than you found it.
  4. Always find root cause. Always look for the root cause of a problem.

Design rules

@roachhd
roachhd / README.md
Last active March 18, 2026 10:56
EMOJI cheatsheet 😛😳😗😓🙉😸🙈🙊😽💀💢💥✨💏👫👄👃👀👛👛🗼🔮🔮🎄🎅👻

EMOJI CHEAT SHEET

Emoji emoticons listed on this page are supported on Campfire, GitHub, Basecamp, Redbooth, Trac, Flowdock, Sprint.ly, Kandan, Textbox.io, Kippt, Redmine, JabbR, Trello, Hall, plug.dj, Qiita, Zendesk, Ruby China, Grove, Idobata, NodeBB Forums, Slack, Streamup, OrganisedMinds, Hackpad, Cryptbin, Kato, Reportedly, Cheerful Ghost, IRCCloud, Dashcube, MyVideoGameList, Subrosa, Sococo, Quip, And Bang, Bonusly, Discourse, Ello, and Twemoji Awesome. However some of the emoji codes are not super easy to remember, so here is a little cheat sheet. ✈ Got flash enabled? Click the emoji code and it will be copied to your clipboard.

People

:bowtie: 😄

@staltz
staltz / introrx.md
Last active March 10, 2026 03:48
The introduction to Reactive Programming you've been missing
@pbojinov
pbojinov / README.md
Last active November 5, 2025 23:10
Two way iframe communication- Check out working example here: http://pbojinov.github.io/iframe-communication/

Two way iframe communication

The main difference between the two pages is the method of sending messages. Recieving messages is the same in both.

Parent

Send messages to iframe using iframeEl.contentWindow.postMessage Recieve messages using window.addEventListener('message')

iframe

@hofmannsven
hofmannsven / README.md
Last active February 24, 2026 02:03
Git CLI Cheatsheet
@jboner
jboner / latency.txt
Last active March 20, 2026 04:54
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD