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    --- GA: UA-34467841-15 --- # 純前端也能搞 AI?Gemini Nano 簡介 - 黃銘(Mike Huang) ###### tags: `HelloWorld2025` `HWDC2025` `2025` `A 會議室` `前端嶄新技術` <blockquote> Google Chrome 瀏覽器在 138 版後開始內建了代號 Gemini Nano 的 LLM AI 模型,並透過多項 API 開放給開發者使用,這讓前端開發 AI 應用程式多了一個全新的選擇!開發者可以利用這些內建 AI API,直接在前端實現即時翻譯、多語內容摘要、自動撰寫與改寫等智慧功能,而無需依賴雲端服務,本次演講將介紹一個純前端開發人員如何有機會透過 Gemini Nao 開發各種 AI 應用程式,為網站帶來更快速、創新且以使用者為中心的體驗。 聽眾收穫: 學習如何使用 Gemini Nano 開發純前端 AI 應用程式 </blockquote> {%hackmd @HWDC/announcement-2025 %} ## 會議資訊 **時間:** 14:10 ~ 14:55 **地點:** A 會議室 **日期:** 2025年10月15日 **語言:** 中文 **難度:** 中階 **相關連結:** - [Hello World Dev Conference 2025 官方網站](https://hwdc.ithome.com.tw/2025) [target=_blank] - [Hello World 2025 議程表](https://hwdc.ithome.com.tw/2025/agenda) [target=_blank] ## 筆記區 範例程式:https://github.com/wellwind/hwdc25-gemini-nano #### 為何需要內建 AI 模型 - 雲端 API: 強大但受延遲、隱私、成本限制 - 前端自帶模型: 體積與效能難控 - 需求: 兼顧及時體驗與治理 - 解方: 由瀏覽器管理模型與硬體 #### 缺少內建 AI 模型時的前端方案 - REST/WebSocket 呼叫雲端模型 API - Web Worker + WebGPU/Web - - #### 瀏覽器內建 AI 的價值 - 自動管理模型版本與更新 - 整合 CPU/GPU/NPU 降低延遲 - 推論留在裝置滿足隱私 - 離線與弱網仍可運作 - 可與雲端模型混合備援 #### 架構速覽 - Web App 或擴充功能呼叫內建 API - Chrome AI Runtime 調度本地模型與專家模型 - Runtime 依照硬體選擇最佳後端並快取 - 回應於裝置內完成後送回前端 須注意仍存在基本的硬體限制 #### 當前可用的 API - 穩定版 - Translator API - Language Detector API - Summarizer API - 實驗版 - Writer API - Rewriter APO - Prompt API - Proofreader API - <a href="https://developer.chrome.com/docs/ai/built-in-apis?hl=zh-tw" target="_blank" rel="noopener noreferrer">內建 AI API</a> #### 使用案例範疇 - 內容消費:摘要客服、評論聚合 - 內容創作:語氣調整、草稿生成 - 多語支援:即時翻譯與語言切換 - 多模態助手:圖片描述、音訊轉碼 #### 開發前檢查清單 - 特性偵測:`if('Summarizer' in self)` - 使用者啟用:`navigator.userActivation.isActive` - 間天 `downloadprogress` 取得模型下載進度 - 設計雲端/本地備援測略 - 跨來源 iframe 需 `allow="language-model"` 等權限 ## 討論區 > 歡迎在此進行討論與 Q&A ## 相關資源 - 投影片連結:(待講者提供) - 相關文件:(待更新)

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