better-all

Documentation GitHub Repository: https://github.com/shuding/better-all Note: This library is not yet indexed in DeepWiki or Context7. better-all Library better-all provides Promise.all with automatic dependency optimization. Instead of manually analyzing which tasks can run in parallel, tasks declare dependencies inline and execution is automatically optimized. Installation pnpm add better-all Basic Usage import { all } from "better-all" ; const results = await all ( { // Independent tasks run in parallel fetchUser : ( ) => fetchUser ( userId ) , fetchPosts : ( ) => fetchPosts ( userId ) , // Dependent task waits automatically combined : async ( ctx ) => { const user = await ctx . $ . fetchUser ; const posts = await ctx . $ . fetchPosts ; return { user , posts } ; } , } ) ; // results.fetchUser, results.fetchPosts, results.combined all typed Key Advantage: Automatic Optimization // Manual approach - error-prone const [ user , posts ] = await Promise . all ( [ fetchUser ( ) , fetchPosts ( ) ] ) ; const profile = await buildProfile ( user , posts ) ; const [ feed , stats ] = await Promise . all ( [ buildFeed ( profile , posts ) , buildStats ( profile ) , ] ) ; // better-all - dependencies declared, execution optimized const results = await all ( { user : ( ) => fetchUser ( ) , posts : ( ) => fetchPosts ( ) , profile : async ( ctx ) => buildProfile ( await ctx . $ . user , await ctx . $ . posts ) , feed : async ( ctx ) => buildFeed ( await ctx . $ . profile , await ctx . $ . posts ) , stats : async ( ctx ) => buildStats ( await ctx . $ . profile ) , } ) ; Type Inference Results are fully typed based on task return types: const results = await all ( { count : ( ) => Promise . resolve ( 42 ) , name : ( ) => Promise . resolve ( "test" ) , combined : async ( ctx ) => ( { count : await ctx . $ . count , name : await ctx . $ . name , } ) , } ) ; // TypeScript knows: // results.count: number // results.name: string // results.combined: { count: number; name: string } References For complex DAG patterns, see dag-patterns.md