Notes archive

The idea is that every entry is like a note-to-self kind of thing. Every post is a mini-knowledge bomb I wish someone else had dropped before me, so I wouldn’t have had to research and write it.

JavaScript A horrifying globalThis polyfill in universal JavaScript
JavaScript performance JavaScript engine fundamentals: optimizing prototypes
JavaScript performance JavaScript engine fundamentals: Shapes and Inline Caches
JavaScript performance Asynchronous stack traces: why await beats Promise#then()
JavaScript Unicode ECMAScript regular expressions are getting better!
JavaScript Unicode Unicode property escapes in JavaScript regular expressions
JavaScript ES2015 const is not about immutability
JavaScript Unicode Valid JavaScript variable names in ES2015
HTML JavaScript Unicode Unicode-aware regular expressions in ES2015
Email Dear Google, please fix plain text emails in Gmail
Bash cryptography JavaScript Python PBKDF2+HMAC hash collisions explained
JavaScript Unicode JavaScript has a Unicode problem
CSP PHP security Processing Content Security Policy violation reports
CSP DOM HTML JavaScript PHP security Hiding JSON-formatted data in the DOM with CSP enabled
DOM HTTP JavaScript Loading JSON-formatted data with Ajax and xhr.responseType='json'
JavaScript Reserved keywords in JavaScript
MySQL security Unicode How to support full Unicode in MySQL databases
Dropquest JavaScript How to speedrun Dropbox’s Dropquest 2012
CSS Unquoted font family names in CSS
JavaScript Unquoted property names / object keys in JavaScript
JavaScript Unicode Valid JavaScript variable names in ES5
JavaScript Unicode JavaScript’s internal character encoding: UCS-2 or UTF-16?
JavaScript Unicode JavaScript character escape sequences
HTML SGML The smallest possible valid (X)HTML documents
HTML Ambiguous ampersands
JavaScript JavaScript foo.prototype.bar notation
CSS HTML HTML element + attribute notation
JavaScript performance How I detect and use localStorage: a simple JavaScript pattern
CSS DOM HTML JavaScript The end-tag open (ETAGO) delimiter
CSS HTML JavaScript Unquoted attribute values in HTML and CSS/JS selectors
CSS HTML In defense of CSS hacks — introducing “safe CSS hacks”
DOM HTML JavaScript Using the oninput event handler with onkeyup/onkeydown as its fallback
HTML iOS performance Everything you always wanted to know about touch icons
HTML iOS JavaScript AirPlay video support in iOS Safari — a bookmarklet
Dropquest JavaScript Completing Dropbox’s Dropquest 2011 in 60 seconds
JavaScript performance Bulletproof JavaScript benchmarks
CSS HTML HTTP PHP Using CSS without HTML
Bash macOS How to create simple Mac apps from shell scripts
HTML JavaScript performance Using setTimeout to speed up window.onload
CSS JavaScript Unicode CSS character escape sequences
CSS HTML Unicode The id attribute got more classy in HTML5
HTML HTTP The XML serialization of HTML5, aka ‘XHTML5’
CSS HTML iOS macOS Thoughts on Safari Reader’s generated HTML
HTML iOS macOS How to enable Safari Reader on your site?
HTML The three levels of HTML5 usage
HTML JavaScript The HTML5 document.head DOM tree accessor
HTML JavaScript jQuery Using Showdown/PageDown with and without jQuery
CSS HTML JavaScript jQuery Bulletproof HTML5 <details> fallback using jQuery
CSS HTML JavaScript Displaying hidden elements like <head> using CSS
CSS HTML JavaScript performance Inline <script> and <style> vs. external .js and .css — what’s the size threshold?
HTML rel="shortcut icon" considered harmful
JavaScript performance Optimizing the asynchronous Google Analytics snippet
meta A fresh start
Apache Apache’s AllowOverride All doesn’t do what you think it does
Apache HTTP PHP Removing ‘www.’ from your URL