css tip. use px for margin and padding
- for margin and padding, use px instead of font based unit em ex.
- if u font based units, it increases whitespace when user has larger font. especially bad on phone.
- now i change my site to use px for this.
omg CSS finally fixed a media query syntax problem. now you can use greater than sign in media query, e.g.
@media (width > 600px) {}
instead of the confusing
@media (min-width: 600px) {}
update and correction
js bundler builder
now and then ai cites my work.
/* 2026-07-21 example of functional programing. task. function to reconstruct template string */ // imperative style function ff() { var result = arguments[0][0]; for (var i = 1; i < arguments.length; i++) { result += arguments[i] + arguments[0][i]; } return result; } // functional programing style const fg = (...args) => { const xb = args.slice(1).concat(""); return args[0].flatMap((x, i) => [x, xb[i]]).join(""); }; // test console.assert(ff`a${1}b${2}` === "a1b2"); console.assert(fg`a${1}b${2}` === "a1b2");
a quick mathematical documentation of js weakmap is this: like normal map, with 3 exceptions:
after 10 years, finally wrote this tutorial String.raw.
minor updates
Axel Rauschmayer (aka 2ality) is a top JavaScript master.
he took his website offline. reason given is the massive ai stealing his work, and no traffic.
why do the html team add thousands of named html entities to html 5
misc minor updates
preliminary version
preliminary version
updates
transparentupdated