GUI code is often harder to test. The nice thing about static guarantees (eg JSX, eslint, typescript) is they work well with GUIs.
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I've been writing docs for different programming language operators (+, *, == and so on). Each one gets a separate web page.
I've suddenly realised that / is much harder! docs/+ and docs/== is fine, but docs// just doesn't work as a URL in a static site.
Any ideas?
Delighted to see that Typescript 7 is moving to conventional LSP for its IDE services!
https://devblogs.microsoft.com/typescript/progress-on-typescript-7-december-2025/#resetting-language-service-issues
Over a sufficiently long time horizon, all code you write is legacy code.