以前こういう課題を触る機会があったのだが、やってみると意外と面白かったので備忘録代わりに残す。 HTMLとCSS シンプル。position:relativeな文字盤の上にposition:absoluteな針を置いているだけ。初期状態で90度回った状態になっているので計算時にずらす。 <!DOCTYPE html> <html lang="ja"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>clock</title> </head> <body> <div id="contents"> <div id="clo
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