Rich Harris 關於「promise.then(...)」的演講,主要探討 Svelte 如何改進非同步操作和資料管理。Harris 首先介紹了 Svelte 透過直接在組件中使用 await 關鍵字來處理 Promise 的新功能,這代表著與傳統組件框架處理非同步資料模式的根本性轉變。他隨後深入解釋了為什麼傳統方法(例如使用載入器或像 React 伺服器組件那樣的解決方案)在處理分散式系統和非同步資料時會遇到問題,強調將資料依賴性與組件共同定位的重要性。Harris 進一步介紹了 Svelte 開發中的「遠端函數」(remote functions)概念,這些函數可以像普通函數一樣被呼叫,但會智慧地處理伺服器端和客戶端之間的資料傳輸、快取和重新驗證。他還展示了 Svelte 如何利用其作為編譯器的優勢,以非常規但更符合慣用語的方式解決複雜的非同步挑戰,並闡述了未來將如何進一步發展這些功能,例如伺服器端渲染、推測性渲染、批處理、即時資料流和嵌入式資料庫整合。
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