Wasm has no threads, and that decides your dispatcher
Dispatchers.Default is a single thread in the browser. Code that was merely slow on Android becomes a frozen tab.
Engineering
Compose, Kotlin, and multiplatform work — the mechanism under the symptom.
296 posts
Corner radius is a signal, and Material has five of them
Material's shape scale gives five corner sizes mapped to component categories. The system is simple; the interesting parts are clip ordering, asymmetric corners, and shapes that must respond to state.
Fifteen named text styles are fewer decisions than five
Material's type scale gives fifteen named roles instead of a font-size parameter. Naming the role rather than the size is what makes typography consistent across a team and correct at large font scales.
Dynamic colour takes your brand palette away, and that's the deal
Dynamic colour derives a full Material scheme from the user's wallpaper. It improves the feel of most apps and destroys brand recognition if applied indiscriminately, so the interesting work is deciding what stays fixed.
I applied my fix to 234 files at once. It broke 233 of them.
A mechanical sweep is one hypothesis executed N times. If the hypothesis is wrong, so is every edit.
Following one rule turned a passing gate into 16 failures. Both rules were right.
Two policies, each locally correct, sharing one assumption nobody owned.
Senior engineers decide without complete information. Here is the method
The skill is not better judgement. It is knowing which kind of door you are standing at.
MaterialTheme is three CompositionLocals and nothing else
MaterialTheme provides three CompositionLocals and a handful of defaults. Understanding its actual shape explains how components pick up styling, why hardcoded values break dark mode, and what a custom theme has to replace.
Most code review approves code. Here is review that improves it
Line-level comments are the least valuable thing in a review. Three questions outrank all of them.
I created three duplicate posts because the only record was a file I didn't read
When an API has no list endpoint, your local record is not a convenience. It is the only state there is.
SearchBar has two states, and the second one takes over the screen
Material 3's SearchBar transitions into a full-screen suggestion surface, which makes it a navigation concern. Chips come in four semantic variants, and the assist/filter/input/suggestion split matters.
Date pickers are a timezone bug with a calendar attached
Compose's date and time pickers are straightforward components hiding a genuine trap: the selected value is UTC-midnight epoch millis, and converting it naively shifts dates by one in most of the world.