第四週 - 網頁 DOM 操作與第三方 API 介接
開課提醒
- 錄影!!!
- 不需報到
- 講解主線任務
DOM(Document Object Model) 文件物件模型
Document (HTML 元素) -> Object(物件)
Image Not Showing
Possible Reasons
- The image was uploaded to a note which you don't have access to
- The note which the image was originally uploaded to has been deleted
Learn More →
取 DOM 元素的方法
- getElementsByTagName()
- getElementsByClassName()
- getElementsById()
- querySelector()
- querySelectorAll()
新增/修改/取得 DOM 元素
中場休息
體驗營加碼福利:3 天快閃優惠活動
串接 API
串接 API 是指在客戶端與伺服器端之間進行資料交換時,客戶端使用特定的程式介面(API)來與伺服器溝通
與伺服器做資料交換
Image Not Showing
Possible Reasons
- The image was uploaded to a note which you don't have access to
- The note which the image was originally uploaded to has been deleted
Learn More →
- 角色分為客戶端、伺服器端、資料庫
- 客戶端對伺服器端發出請求稱為 Request,伺服器端的回應稱為 Response
- 以點餐舉例
- 發網址拿連結內容:
<a href=""></a>
- 發網址拿圖片內容:
<img src="">
- 發網址拿資料
AJAX (Asynchronous JavaScript And XML)
用 JS 發一個 request 到 server,伺服器 response 後我拿到結果
- 找到 CDN(Using unpkg CDN)放到自己的專案內
- get 語法獲取資料
API
Application Programming Interface 應用程式介面
API 會去定義用於發送 Request 和接收 Response 的方法、資料格式、授權機制等
可以把介面想成是一種規格,規定,要和伺服器溝通拿資料的話必須根據這個介面去做
API 文件
串接資料的使用說明書
GET - /api/v1/works - HackMD
總結
作業參考範例
範例一:獲取遠端資料
範例二:將遠端資料渲染至畫面
範例三:完整程式碼
補充:以上範例都有載入 axios 套件在 Settings 裡面
Image Not Showing
Possible Reasons
- The image was uploaded to a note which you don't have access to
- The note which the image was originally uploaded to has been deleted
Learn More →
講解小組任務
補充資料
VS CODE 套件:es6-string-html