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Four small modules the views below adopt: - `lru-map.ts` — a Map re-inserted on read and trimmed from the front. `explore-view` never unmounts and its two art caches were plain Maps: twenty-four searches retained 20.58 MB and were still accelerating, a cover thumbnail being ~27 kB of base64 and an artist photo ~128 kB. - `cache-stats.ts` — a bound has to stay checkable, so caches register and `window.__yjCacheStats()` reports entries, retained chars and cap in one eval, rather than the next session having to rebuild the twenty-four-search reproduction first. - `track-index.ts` — a WeakMap from the tracks array's identity to a Map<FilePath, Track>. Five components turned selected file paths back into tracks with `filePaths.map(fp => tracks.find(...))`, so "Select all -> Edit tags" at 50 000 tracks blocked the main thread for 3.0 to 6.3 s. 68 ms after. Keying on the array's identity is safe for the same reason the memoized filter caches are, and it is collected for free when the store drops the array. - `lazy-track-details.ts` — one memoised dynamic import, because `track-details` (42 kB) was imported for side effect by all five components that open it and so was evaluated before first paint however the routes were split.
YellowJacket Frontend
This directory contains the frontend for YellowJacket.
Dependencies
There are a couple of tools that are required to build and use the frontend.
vitefor- transpiling typescript
- bundling the final "package" that is useb by the webview
- running a dev server with hot-reloading
- configured with the
vite.config.tsfile in this directory
pnpmfor managing frontend dependency packages
There are a handful of dependency packages that we use directly in the frontend.
picocssfor basic CSS while developinglitfor a simple but powerful wrapper around Web Components
Lastly, there are some dependencies that only benefit development
tsservercomes bundled with vscode and can be used as an LSP with other editors usingtypescript-language-server- Used for autocomplete, syntax highlighting, etc.
- This can be configured with the
tsconfig.jsonfile in the root of the project- NOTE: your configuration should align with the
viteconfig so you get in-editor feedback that aligns with how the build will be done.
- NOTE: your configuration should align with the
Development
Ideally, you would use the frontend in the wails app as the frontend depends on the Go bindings generated by Wails.
You can do this by running wails dev in the root of the YellowJacket repo.
If you want to run the frontend standalone, make sure the Wails go bindings have been generated with wails generate modules.
Then, you can run pnpm dev to run the vite dev server.
For more information on what commands are available, refer to package.json.
Code
Web Components
Our frontend is based off of Web Components, a standard that provides native browser encapsulation of components that can include HTML, CSS and Javascript all together.
Instead of writing these components manually in Javascript, we utilize lit as a wrapper library.
Typescript
To better integrate with our tooling and to provide a better developer experience with strong typing, we have written all functional frontend code in Typescript. Vite serves as our Typescript transpiler.
Important Files and Directories
NOTE: most of these directories have aliases defined in tsconfig.json and vite.config.ts so that we may refer to them by shorthand when importing.
index.htmlandindex.jsis the entrypoint for the frontend. The first page that loads.wailsjs/goGo code bindings generated by wails reside herewailsjs/runtimethe Wails runtime code needed to use Wails featuressrcall app code resides heresrc/assetsstatic assets like fonts, images and iconssrc/componentslit components that are used to compose the applicationsrc/pagespages that serve as other entrypoints for the application that can be navigated to