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    ###### tags: `JavaScript 30` JavaScript 30 Challenge === [01. Drum Kit](/lExbJKSxRfiAeuF2N5LBuQ) --- - Transitionend Event 過度結束事件 - HTML 影音 DOM - data-* 屬性 [02. JS and CSS Clock](/MT_xvkm8TNCwYTIjqwdavw) --- - 指定原點位置做元素變形 - transform-origin - 用 JS 動態加入 CSS 樣式、屬性 - 設定間隔時間 - setInterval - 認識時間戳 [03. CSS Variables](/v6eoR7iOQaCLiKDjC9049w) --- - CSS 變數運用(CSS Variables) - 用 JS 動態加入 / 修改 CSS 樣式、屬性 - oninput 事件 - CSS 濾鏡效果 - filter 屬性 [04. Array Cardio Day 1](/xdsc1QQxQm-kTFpald3lXw) --- - 陣列的運用 - 物件取值 - console.table [05. Flex Panel Gallery](/DBP1UbWxSjKZZe6CGskKAg) --- - Flex 屬性運用 - 偽類運用 [06. Type Ahead](/a9umK1r_Rmml_KEy1MF2Iw) --- - 字串方法 - 正則表達式 [07. Array Cardio Day 2](/04qP6JRyS-ybO9SwHcpCTg) --- - 陣列的運用 [08. Fun with HTML 5 Canvas](/dvpjdCc_RxCL312mu-fJ6g) --- - Canvas 運用 - 網頁色彩運用 - 任務程式碼解析 [09. Dev Tools Domination](/pi16RielSnWZhqVuoMwLKg) --- - Console Methods 運用 [10. Hold Shift and Check Checkboxes](/wAWYphxcSH-c3co32xD27g) --- [11. Custom Video Player](/lJf5HlRQTC2M7HMQzwM8PQ) --- - video 屬性 / 方法的應用 [12. Key Sequence Detection](/ALnmsoXVTkWG0-W2Lww-pg) --- - Cornify GitHub - 實用陣列操作大全 (進階篇) - 字串方法 - String.prototype [13. Slide in on Scroll](/szgWAeEXReSIHEVT5SQbRA) --- - 滑輪、視窗寬高、子元素位置 - scroll / innerHeight / offsetTop [14. JavaScript References VS Copying](/OcXA5MOMS56m_OrxZSWGrA) --- - 傳值(by Value)? 傳址 = 傳參考(by Reference)? [15. LocalStorage](/ANC-Y4UpTP-AavkJQc6Z1A) --- - LocalStorage [16. Mouse Move Shadow](/rirCj7cHSXmIRZBYpwIKQA) --- - text-shadow 屬性 - contenteditable 屬性 [17. Sort Without Articles](/DJlemhkgRb6GEIv-lOm8MA) --- - 字串方法 - split() 字串切割 - 字串方法 - replace() 替換字串 - 正則表達式 - RegExp [18. Adding Up Times with Reduce](/TtY2miolSwKb5baFDC5cYQ) --- - 字串方法 - split() 字串切割 [19. Webcam Fun](/_tyh3QjSR0yX3GucAnYbeA) --- - 影像授權方式 - Canvas 畫布的應用 - Video 元素方法 srcObject - 節點新增應用 Node.insertBefore() / Node.appendChild() [20. Speech Detection](/E_UE1SdaT1yXpPl7VjO_Og) --- - 語音辨識方法 - 監聽事件,`result`, `end` - 節點新增應用 Node.insertBefore() / Node.appendChild() [21. Geolocation](/4FNtueV-RRy6Gp3HJVgKCA) --- - 位置辨識方法 [22. Follow Along Link Hightlighter](/rTJtjGs0Rxa_qFjJj3M-Yw) --- - Element.getBoundingClientRect() 方法以及 DOMRect 物件 - 使用 JS 寫入 CSS 樣式 - mouseenter 事件 [23. Speech Synthesis](/PUs_WRdYTvGSdAkPU4g-_g) --- - 閱讀文字方法 - speechThesis 的監聽事件 voiceschanged - 熟悉物件取值(中括號取值)的使用時機 - 函式參數預設值的使用方式 [24. Sticky Nav](/8BJFJFRiSkmA5IRxuBYhAA) --- - 使用 JS 的方式去置頂 navbar - 滾動事件會用到的一些屬性:window.scrollY, offsetHeight, offsetTop - 修改樣式的方法:Style 屬性、classList.add() / remove() 的方式 [25. Event Capture, Propagation, Bubbling and Once](/ijywClqhTHKKqu8j7Kvbzw) --- - 監聽事件的參數與執行差異 [26. Stripe Follow Along Nav](/0ZaErWBXT--cYIqqSa1A2Q) --- - setTimeout 的方法的運用與效果 - mouseenter, mouseleave 事件運用 - `Element.getBoundingClientRect()` 方法使用 - JS 寫入 CSS 樣式的技巧 [27. Click and Drag](/72UIORd-SSag-gAEsa_LtQ) --- - MouseEvent.movementX - Element.scrollLeft - scaleX 與 rotateY 搭配使移動時有 3D 效果或是 perspective 呈現出立體視角 [28. Video Speed Controller](/axXO25GATWGBZsvx2MUEvA) --- - 滑鼠監聽事件:mousemove - 影片速度調節:video.playbackRate - 取得畫面顯示高度或 Y 軸位置等方法:Element.offsetHeight、MouseEvent.offsetY [29. Countdown Timer](/A5vrKImqSNWPFuWOm1v7kQ) --- - 設定間隔時間 - setInterval - 時間戳 & 現在時間 - 型別轉換 - data-屬性妙用 - 三元運算子 [30. Whack A Mole](/fy0_7LKrTIGTEZDBPqOW3w) --- - 隨機數的產生:Math.random() - 數字轉換的處理:Math.round()、MDN - Math.floor() - 設定時間的運用:setTimeout() - 使用 flag 變數的運用 - 使用函式製作迴圈的方式

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