\u554f\u984c\u306f<\/p>\n
- \n
- \u4e09\u89d2\u5f62\u3092\u4e00\u3064\u3001canvas \u4e0a\u306b\u63cf\u753b\u3057\u3066\u304f\u3060\u3055\u3044<\/li>\n<\/ul>\n
\u3067\u3057\u305f\u306d\u3002<\/p>\n
\u3067\u306f\u56de\u7b54\u3002<\/p>\n
\nconst main = () =\uff1e {\n \/\/ \u30ad\u30e3\u30f3\u30d0\u30b9\u8981\u7d20\u306e\u53d6\u5f97\n const canvas = document.getElementById(\u2019canvas\u2019);\n \/\/ \u30ad\u30e3\u30f3\u30d0\u30b9\u3092\u64cd\u4f5c\u3059\u308b API \u3092\u53d6\u5f97\n const ctx = canvas.getContext(\u20192d\u2019);\n\n \/\/ \u7dda\u3092\u5f15\u304f\u4f5c\u696d\u3092\u958b\u59cb\n ctx.beginPath();\n\n \/\/ \u30d1\u30b9\u3092\u4f5c\u6210\n ctx.moveTo(120, 120);\n\n ctx.lineTo(80, 190);\n ctx.lineTo(160, 190);\n ctx.closePath();\n\n \/\/ \u5857\u308a\u3064\u3076\u3057\u306e\u8272\u3092\u6307\u5b9a\n ctx.fillStyle = \u2019rgb(150, 33, 253)\u2019;\n\n \/\/ \u5857\u308a\u3064\u3076\u3057\u3092\u5b9f\u884c\n ctx.fill();\n};\n\ndocument.addEventListener(\u2019DOMContentLoaded\u2019, main);\n<\/pre>\n![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/0d40a5e4a645fc6b96e767d64ac0878e-2-300x252.png\")
<\/p>\n\u56de\u7b54\u3068\u3057\u3066\u306f\u6b63\u4e09\u89d2\u5f62\u306b\u8fd1\u3044\u5f62\u306b\u3057\u3066\u307f\u307e\u3057\u305f\u304c\u3001
\n\u30d2\u30f3\u30c8\u306b\u3082\u3042\u3063\u305f\u3088\u3046\u306b\u300c\u89d2\u304c 3 \u3064\u3042\u308c\u3070\u4e09\u89d2\u5f62\u300d\u306a\u306e\u3067\u3001
\n\u9577\u65b9\u5f62\u3092\u30d1\u30b9\u3092\u3064\u306a\u3044\u3067\u63cf\u753b\u3057\u305f\u30b5\u30f3\u30d7\u30eb\u304b\u3089\u4e00\u70b9\u524a\u3063\u305f\u3060\u3051\u3067\u3082 OK \u3067\u3059\u3002<\/p>\n![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/0d40a5e4a645fc6b96e767d64ac0878e-3-300x262.png\")
<\/p>\n\u3053\u308c\u3082 OK \u3002<\/p>\n
\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3068\u306f\uff1f<\/h1>\n
\u3055\u3066\u3001\u4eca\u56de\u306e\u672c\u984c\u306b\u5165\u3063\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u307e\u305a\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u3069\u3046\u3084\u3063\u3066\u4f5c\u308b\u304b\uff1f\u3068\u3044\u3046\u304a\u8a71\u304b\u3089\u3002<\/p>\n
\u305d\u3082\u305d\u3082\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u4ed5\u7d44\u307f\u306f\u3069\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u3001\u3068\u3044\u3046\u8a71\u3067\u3059\u304c\u3001
\n\u7c21\u5358\u306b\u304a\u306f\u306a\u3057\u3059\u308b\u3068\u3001\u30d1\u30e9\u30d1\u30e9\u6f2b\u753b\u3068\u540c\u3058\u4ed5\u7d44\u307f\u306a\u3093\u3067\u3059\u306d\u3002
\n\uff08\u3053\u308c\u306f\u3088\u304f\u805e\u304f\u304a\u8a71\u3067\u3059\u3088\u306d\uff01\uff09<\/p>\n![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/850c7612116999490846136e772ab7fd-1-175x300.png\")
<\/p>\n\u4f8b\u3048\u3070\u3001\u3053\u3093\u306a\u611f\u3058\u306e 1 ~ 4 \u306e\u753b\u50cf\u3092\u7528\u610f\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002
\n\u3053\u308c\u3092\u9806\u756a\u306b\u4e00\u3064\u305a\u3064\u8868\u793a\u3057\u3066\u307f\u308b\u3068\u2026<\/p>\n![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/anim.gif\")
<\/p>\n\u4e38\u304c\u52d5\u3044\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u306d\uff01
\n\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u3053\u3093\u306a\u611f\u3058\u3067\u753b\u50cf\u3092\u3046\u307e\u304f\u5dee\u3057\u66ff\u3048\u308b\u3053\u3068\u3067
\n\u3042\u305f\u304b\u3082\u52d5\u3044\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u305b\u304b\u3051\u308b\u6280\u306a\u3093\u3067\u3059\u306d\u3002<\/p>\ncanvas \u3067\u4e38\u3092\u52d5\u304b\u3059<\/h1>\n
\u4e00\u5b9a\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u4e38\u3092\u63cf\u753b\u3057\u76f4\u3057\u3066\u307f\u3088\u3046<\/h2>\n
\u3055\u3066\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u8003\u3048\u65b9\u304c\u5206\u304b\u3063\u305f\u3068\u3053\u308d\u3067\u3001
\n\u5b9f\u969b\u306b canvas \u3067\u4e38\u304c\u52d5\u304f\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\u8981\u306f\u3001\u4e00\u5b9a\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u4e38\u3092\u4f55\u5ea6\u3082\u66f8\u304d\u76f4\u305b\u3070\u3044\u3044\u308f\u3051\u3067\u3059\u3088\u306d\u3002<\/p>\n
\u3068\u3044\u3046\u308f\u3051\u3067\u4f5c\u3063\u305f\u306e\u304c\u3053\u306e\u30b3\u30fc\u30c9\u3002<\/p>\n
\nconst main = () =\uff1e {\n const canvas = document.getElementById(\u2019canvas\u2019);\n const ctx = canvas.getContext(\u20192d\u2019);\n ctx.fillStyle = \u2019rgb(63, 81, 181)\u2019;\n\n let x = 50;\n\n const draw = () =\uff1e {\n ctx.beginPath();\n ctx.arc(x, 240, 40, 0, Math.PI*2, false)\n ctx.fill();\n\n \/\/ x \u3092 20 \u5897\u52a0\n x += 20;\n \/\/ 100 \u30df\u30ea\u79d2(0.1 \u79d2)\u5f8c\u306b draw \u3092\u518d\u5ea6\u547c\u3073\u51fa\u3057\n setTimeout(draw, 100, x + 20);\n };\n\n \/\/ \u4e00\u56de\u76ee\u63cf\u753b\u5b9f\u884c\n draw();\n};\n\ndocument.addEventListener(\u2019DOMContentLoaded\u2019, main);\n<\/pre>\nmain \u306e\u4e2d\u306b draw \u3068\u3044\u3046\u95a2\u6570\u3092\u4f5c\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u3053\u308c\u3092\u5b9f\u884c\u3059\u308b\u305f\u3073\u306b\u3001\u4e38\u304c\u63cf\u753b\u3055\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u306d\u3002<\/p>\n
\nctx.arc(x, 240, 40, 0, Math.PI*2, false)\n<\/pre>\n
x \u306f\u95a2\u6570\u306e\u5916\u3067\u307e\u305a\u5b9a\u7fa9\u3057\u3066\u304a\u3044\u3066\u3001
\n\u63cf\u753b\u3092\u5b9f\u884c\u3057\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067x += 20;<\/code> \u3067 x \u3092 20 \u305a\u3064\u5897\u3084\u3057\u307e\u3059\u3002<\/p>\n\n \/\/ 100 \u30df\u30ea\u79d2(0.1 \u79d2)\u5f8c\u306b draw \u3092\u518d\u5ea6\u547c\u3073\u51fa\u3057\n setTimeout(draw, 100);\n<\/pre>\n
draw \u95a2\u6570\u5185\u3067 setTimeout \u3092\u4f7f\u7528\u3057\u3001draw \u81ea\u8eab\u3092\u547c\u3073\u76f4\u3059\u3053\u3068\u3067\u3001
\ndraw \u304c\u7d42\u4e86\u3057\u305f\u3089 0.1 \u79d2\u5f8c\u306b\u518d\u5ea6 draw \u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u2026\u3068\u3044\u3046\u5f62\u306b\u3057\u3066
\n\u7e70\u308a\u8fd4\u3057\u5b9f\u884c\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\u6700\u5f8c\u306b\u3001<\/p>\n
\n \/\/ \u4e00\u56de\u76ee\u63cf\u753b\u5b9f\u884c\n draw();\n<\/pre>\n
2 \u56de\u76ee\u4ee5\u964d\u306f\u5148\u307b\u3069\u306e setTimeout \u3067\u5b9f\u884c\u3055\u308c\u308b\u306e\u3067\u3001
\n1 \u56de\u76ee\u3060\u3051\u306f\u666e\u901a\u306b\u547c\u3073\u51fa\u3057\u3066\u3042\u3052\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u306d\u3002<\/p>\n\u3064\u307e\u308a\u3001\u5148\u307b\u3069\u306e setTimeout \u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u3001<\/p>\n
\ndraw() \/\/ x \u306f 50\n\u2193 0.1\u79d2\u5f8c\ndraw() \/\/ x \u306f 70\n\u2193 0.1\u79d2\u5f8c\ndraw() \/\/ x \u306f 90\n\u2193 0.1\u79d2\u5f8c\n...\n<\/pre>\n
\u3068\u3044\u3046\u611f\u3058\u3067\u63cf\u753b\u3055\u308c\u3066\u3044\u304f\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3055\u3066\u3001\u30b3\u30fc\u30c9\u306e\u52d5\u304d\u304c\u5206\u304b\u3063\u3066\u304d\u305f\u3068\u3053\u308d\u3067
\n\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u304b\u3002<\/p>\n![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/anim-1-300x224.gif\")
<\/p>\n\u3042\u308c\uff1f\u306a\u3093\u304b\u601d\u3063\u3066\u305f\u306e\u3068\u9055\u3046\u2026<\/p>\n
\u4e38\u3092\u63cf\u753b\u3059\u308b\u524d\u306b\u3001 canvas \u3092\u307e\u3063\u3055\u3089\u306b\u3057\u306a\u3044\u3068\uff01<\/h2>\n
\u305d\u3046\u3044\u3048\u3070\u3001\u4e00\u5ea6\u66f8\u3044\u305f\u5186\u3092\u6d88\u3057\u3066\u3044\u306a\u3044\u3067\u3059\u306d\uff01
\n\u5186\u3092\u6d88\u3055\u305a\u306b\u4f55\u5ea6\u3082\u66f8\u3044\u3066\u3044\u308b\u306e\u3067\u3001\u540c\u3058\u7d19\u306b\u4f55\u5ea6\u3082\u4e38\u3092\u66f8\u3044\u3066\u3044\u308b\u307f\u305f\u3044\u306b\u306a\u3063\u3066\u3057\u307e\u3063\u305f\u3088\u3046\u3067\u3059\u3002<\/p>\n\u3068\u3044\u3046\u3053\u3068\u3067\u3001draw \u95a2\u6570\u306e\u6700\u521d\u306b\u3001canvas \u3092\u4e00\u5ea6\u304d\u308c\u3044\u306b\u3059\u308b\u3088\u3046\u306b\u547d\u4ee4\u3092\u8ffd\u52a0\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\nconst main = () =\uff1e {\n const canvas = document.getElementById(\u2019canvas\u2019);\n const ctx = canvas.getContext(\u20192d\u2019);\n ctx.fillStyle = \u2019rgb(63, 81, 181)\u2019;\n\n let x = 50;\n\n const draw = () =\uff1e {\n \/\/ canvas \u5185\u3092\u307e\u3063\u3055\u3089\u306b\u3059\u308b\n ctx.clearRect(0, 0, 640, 480);\n\n ctx.beginPath();\n ctx.arc(x, 240, 40, 0, Math.PI*2, false)\n ctx.fill();\n\n \/\/ 100 \u30df\u30ea\u79d2(0.1 \u79d2)\u5f8c\u306b draw \u3092\u518d\u5ea6\u547c\u3073\u51fa\u3057\n setTimeout(draw, 100, x + 20);\n };\n\n \/\/ x \u3092 20 \u5897\u52a0\n x += 20;\n \/\/ \u4e00\u56de\u76ee\u63cf\u753b\u5b9f\u884c\n draw();\n};\n\ndocument.addEventListener(\u2019DOMContentLoaded\u2019, main);\n<\/pre>\n\u5897\u3048\u305f\u306e\u306f\u3053\u306e\u90e8\u5206\u3060\u3051<\/p>\n
\n \/\/ canvas \u5185\u3092\u307e\u3063\u3055\u3089\u306b\u3059\u308b\n ctx.clearRect(0, 0, 640, 480);\n<\/pre>\n
canvas \u306b\u306f\u3001\u5168\u3066\u3092\u6d88\u3059\u3068\u3044\u3046\u547d\u4ee4\u306f\u3042\u308a\u307e\u305b\u3093\u3002
\nclearRect<\/code> \u306f\u3001\u6d88\u3059\u7bc4\u56f2\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u6d88\u3059\u7bc4\u56f2\u3092 canvas \u5168\u4f53\u3068\u3057\u3066\u6307\u5b9a\u3057\u3066\u3042\u3052\u307e\u3057\u305f\u3002<\/p>\nclearRect<\/code> \u306e\u5f15\u6570\u306f\u3001\u524d\u56de\u9577\u65b9\u5f62\u3092\u7c21\u5358\u306b\u63cf\u753b\u3059\u308b\u65b9\u6cd5\u3067\u3054\u7d39\u4ecb\u3057\u305ffillRect<\/code> \u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n\nclearRect(x\u8ef8\u306e\u30b9\u30bf\u30fc\u30c8, y\u8ef8\u306e\u30b9\u30bf\u30fc\u30c8, \u6a2a\u5e45, \u9ad8\u3055)\n<\/pre>\n
\u306a\u306e\u3067\u3001 \u30b9\u30bf\u30fc\u30c8\u5730\u70b9\u306f 0 (\u539f\u70b9)\u3068\u3057\u3066\u3001\u6a2a\u5e45\u3068\u9ad8\u3055\u306f canvas \u306e\u30b5\u30a4\u30ba\u3068\u540c\u3058\u3082\u306e\u3092\u6307\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n
\u3053\u308c\u3067\u3001\u4e38\u3092\u66f8\u304f\u524d\u306b\u6bce\u56de canvas \u304c\u307e\u3063\u3055\u3089\u306b\u306a\u308b\u306e\u3067\u3001
\n\u4eca\u5ea6\u3053\u305d\u3046\u307e\u304f\u3044\u304f\u306f\u305a\u2026<\/p>\n\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n
![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/anim-2-300x224.gif\")
<\/p>\n\u4eca\u5ea6\u306f\u6210\u529f\u3067\u3059\u306d\uff01
\n\u304d\u3061\u3093\u3068\u4e38\u304c\u5de6\u304b\u3089\u53f3\u3078\u52d5\u3044\u3066\u3044\u308b\u3088\u3046\u306b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3067\u304d\u307e\u3057\u305f\uff01<\/p>\n\u3088\u308a\u300c\u52b9\u7387\u7684\u306a\u300d\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u76ee\u6307\u3057\u3066<\/h2>\n
\u3055\u3066\u3001\u3053\u308c\u3067\u76ee\u7684\u306f\u9054\u6210\u3055\u308c\u305f\u306e\u3067\u3059\u304c\u3001
\n\u4e00\u3064\u3060\u3051\u61f8\u5ff5\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\u305d\u308c\u306f\u3053\u3053<\/p>\n
\n \/\/ 100 \u30df\u30ea\u79d2(0.1 \u79d2)\u5f8c\u306b draw \u3092\u518d\u5ea6\u547c\u3073\u51fa\u3057\n setTimeout(draw, 100, x + 20);\n<\/pre>\n
\u7279\u306b\u554f\u984c\u306a\u3044\u51e6\u7406\u306e\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u3061\u3087\u3063\u3068\u6c17\u3092\u3064\u3051\u3066\u304a\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
setTimeout \u306e\u6319\u52d5\u306f\u300c\u547d\u4ee4\u3092\u51fa\u3055\u308c\u3066\u304b\u3089\u6307\u5b9a\u79d2\u6570\u5f8c(0.1)\u306b\u3001\u5f15\u6570\u306b\u6e21\u3055\u308c\u305f\u95a2\u6570\uff08draw\uff09\u3092\u5b9f\u884c\u3059\u308b\u300d\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002
\n\u3064\u307e\u308a\u3001\u52d5\u304d\u3068\u3057\u3066\u306f\u3053\u3046\u3002<\/p>\n![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/850c7612116999490846136e772ab7fd-2-300x50.png\")
<\/p>\n\u4eca\u306f\u5186\u3092\u4e00\u3064\u63cf\u753b\u3059\u308b\u4f4d\u306a\u306e\u3067\u3042\u307e\u308a\u554f\u984c\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u304c\u3001
\n\u6b63\u78ba\u306b\u306f \u300c0.1 \u79d2 + \u63cf\u753b\u306b\u304b\u304b\u308b\u6642\u9593\u300d\u3054\u3068\u306b\u51e6\u7406\u304c\u3046\u3054\u3044\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\u4eca\u5f8c\u3001\u7269\u7406\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u3063\u3066\u3044\u304f\u4e0a\u3067\u306f\u3001\u6642\u9593\u306e\u6271\u3044\u306f\u3068\u3066\u3082\u5927\u5207\u306a\u306e\u3067
\n\u3067\u304d\u308b\u3060\u3051\u3053\u306e\u3088\u3046\u306a\u30ba\u30ec\u304c\u767a\u751f\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u305f\u3044\u3068\u3053\u308d\u3067\u3059\u3002<\/p>\n\u307e\u305f\u3082\u3046\u4e00\u3064\u3001\u3053\u3061\u3089\u306e\u65b9\u304c\u5272\u3068\u672c\u984c\u306a\u306e\u3067\u3059\u304c\u3001
\n\u753b\u9762\u306e\u66f4\u65b0\u304c 0.1 \u79d2\u3054\u3068\u306b\u56fa\u5b9a\u3055\u308c\u3066\u3057\u307e\u3046\u3001\u3068\u3044\u3046\u554f\u984c\u304c\u3042\u308a\u307e\u3059\u3002\u3000<\/p>\n\u3064\u307e\u308a\u3001\u30da\u30fc\u30b8\u3092\u898b\u3066\u3044\u308b\u4eba\u304c\u4f7f\u3063\u3066\u3044\u308b PC \u3084\u30b9\u30de\u30db\u306e\u6027\u80fd\u306b\u3088\u3063\u3066\u3001
\n\u3082\u3063\u3068\u983b\u7e41\u306b\u66f4\u65b0\u3057\u3066\u306a\u3081\u3089\u304b\u306a\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u8868\u793a\u3067\u304d\u308b\u5834\u5408\u3084\u3001
\n\u9006\u306b\u6027\u80fd\u304c\u8ffd\u3044\u3064\u3044\u3066\u3044\u306a\u304f\u3066\u66f4\u65b0\u983b\u5ea6\u3092\u843d\u3068\u3057\u305f\u3044\u5834\u5408\u3067\u3082
\n\u554f\u7b54\u7121\u7528\u3067 0.1 \u79d2\u3054\u3068\u306e\u66f4\u65b0\u3092\u5b9f\u65bd\u3057\u307e\u3059\u3002<\/p>\n\u3055\u3089\u306b\u306f\u3001\u5225\u306e\u30bf\u30d6\u3092\u958b\u3044\u3066\u3044\u308b\u7b49\u3067\u30da\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u304d\u306b\u3082\u3001
\n\u304a\u69cb\u3044\u306a\u3057\u306b 0.1 \u79d2\u3054\u3068\u306b\u753b\u9762\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002<\/p>\n\u306a\u3093\u3060\u304b\u3061\u3087\u3063\u3068\u975e\u52b9\u7387\u3067\u3059\u3088\u306d\uff1f<\/p>\n
\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u305d\u308c\u3092\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5\u304c JavaScript \u306b\u306f\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\nrequestAnimationFrame(\u5b9f\u884c\u3059\u308b\u95a2\u6570)\n<\/pre>\n
\u3053\u308c\u306f\u3001\u753b\u9762\u306e\u8868\u793a\u3092\u66f4\u65b0\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u3001
\n\u5f15\u6570\u306b\u6e21\u3055\u308c\u305f\u95a2\u6570\u3092\u5b9f\u884c\u3059\u308b\u547d\u4ee4\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\u5148\u307b\u3069\u306e setTimeout \u3068\u7570\u306a\u308a\u3001\u6307\u5b9a\u3057\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u306e\u66f4\u65b0\u306f\u3067\u304d\u307e\u305b\u3093\u304c\u3001
\n\u30d6\u30e9\u30a6\u30b6\u5074\u304c\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3059\u308b\u306e\u306b\u6700\u3082\u826f\u3044\u30bf\u30a4\u30df\u30f3\u30b0\u3067
\n\u753b\u9762\u66f4\u65b0\u7528\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3066\u304f\u308c\u308b\u306e\u3067\u3059\u306d\u3002<\/p>\n\u3064\u307e\u308a\u3001\u306a\u3081\u3089\u304b\u306b\u52d5\u304b\u3059\u3060\u3051\u306e\u4f59\u529b\u304c\u3042\u308b\u6642\u306f\u3001\u3088\u308a\u983b\u7e41\u306b\u95a2\u6570\u3092\u5b9f\u884c\u3057\u3001
\n\u753b\u9762\u304c\u96a0\u308c\u3066\u8868\u793a\u3055\u308c\u306a\u3044\u306a\u3069\u306e\u753b\u9762\u66f4\u65b0\u304c\u5fc5\u8981\u306a\u3044\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u306f
\n\u307b\u3068\u3093\u3069\u66f4\u65b0\u7528\u306e\u95a2\u6570\u3092\u5b9f\u884c\u3057\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3001\u3068\u8a00\u3063\u305f\u5236\u5fa1\u3092
\n\u52dd\u624b\u306b\u3084\u3063\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\nrequestAnimationFrame \u3092\u4f7f\u3063\u3066\u4fee\u6b63\u3057\u305f\u30b3\u30fc\u30c9\u306f\u3053\u3093\u306a\u611f\u3058<\/p>\n
\nconst main = () =\uff1e {\n const canvas = document.getElementById(\u2019canvas\u2019);\n const ctx = canvas.getContext(\u20192d\u2019);\n ctx.fillStyle = \u2019rgb(63, 81, 181)\u2019;\n\n \/\/ \u958b\u59cb\u6642\u70b9\u306e\u6642\u9593\u3092\u53d6\u5f97\u3057\u3066\u304a\u304f\n let prev_time = new Date();\n\n \/\/ \u958b\u59cb\u6642\u70b9\u306e x \u5ea7\u6a19\u3092\u8a2d\u5b9a\u3057\u3066\u304a\u304f\n let x = 50;\n\n const draw = () =\uff1e {\n ctx.clearRect(0, 0, 640, 480);\n\n \/\/ \u73fe\u5728\u6642\u523b\u3092\u53d6\u5f97\n const now = new Date();\n\n \/\/ \u958b\u59cb\u6642\u70b9\u304b\u3089\u73fe\u5728\u307e\u3067\u3001\u4f55\u30df\u30ea\u79d2\u7d4c\u904e\u3057\u3066\u3044\u308b\u304b\u3092\u8a08\u7b97\n const diffMillisecond = now.getTime() - prev_time.getTime();\n \/\/ \u524d\u56de\u5730\u70b9 + (\u7d4c\u904e\u30df\u30ea\u79d2 * 0.2) \u3067\u3001\u73fe\u5728\u4f4d\u7f6e\u3092\u7b97\u51fa\n x = x + (diffMillisecond * 0.2);\n\n ctx.beginPath();\n ctx.arc(x, 240, 40, 0, Math.PI*2, false)\n ctx.fill();\n\n \/\/ \u6b21\u56de\u306e\u5b9f\u884c\u306e\u305f\u3081\u306b\u3001\u4eca\u56de\u306e\u6642\u9593\u3092\u8a18\u9332\u3057\u3066\u304a\u304f\n prev_time = now;\n\n \/\/ \u6b21\u56de\u753b\u9762\u66f4\u65b0\u6642\u306b draw \u3092\u5b9f\u884c\u3059\u308b\u3088\u3046\u306b\u6307\u5b9a\n requestAnimationFrame(draw);\n };\n\n \/\/ \u4e00\u56de\u76ee\u63cf\u753b\u5b9f\u884c\n draw();\n};\n\ndocument.addEventListener(\u2019DOMContentLoaded\u2019, main);\n\n<\/pre>\n\u30dd\u30a4\u30f3\u30c8\u306f\u3053\u3053<\/p>\n
\n \/\/ \u958b\u59cb\u6642\u70b9\u304b\u3089\u73fe\u5728\u307e\u3067\u3001\u4f55\u30df\u30ea\u79d2\u7d4c\u904e\u3057\u3066\u3044\u308b\u304b\u3092\u8a08\u7b97\n const diffMillisecond = now.getTime() - prev_time.getTime();\n \/\/ \u524d\u56de\u5730\u70b9 + (\u7d4c\u904e\u30df\u30ea\u79d2 * 0.2) \u3067\u3001\u73fe\u5728\u4f4d\u7f6e\u3092\u7b97\u51fa\n x = x + (diffMillisecond * 0.2);\n<\/pre>\n
setTimeout \u3067\u306f\u7d04 0.1 \u79d2\u306b\u4e00\u5ea6\u66f4\u65b0\u3055\u308c\u308b\u524d\u63d0\u3067\u3001
\n\u6bce\u56de\u66f4\u65b0\u3054\u3068\u306b x \u65b9\u5411\u3078 20 \u3060\u3051\u4e38\u3092\u52d5\u304b\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\u3067\u3059\u304c\u3001\u4eca\u56de requestAnimationFrame \u3092\u4f7f\u3046\u5834\u5408\u306b\u306f\u3001
\n\u3069\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u66f4\u65b0\u95a2\u6570\u304c\u547c\u3070\u308c\u308b\u304b\u5206\u304b\u308a\u307e\u305b\u3093\u3002
\n\u524d\u56de\u753b\u9762\u8868\u793a\u3092\u66f4\u65b0\u3057\u3066\u304b\u3089 0.01 \u79d2\u3067\u6b21\u304c\u547c\u3070\u308c\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3057\u3001
\n\u3082\u3057\u304b\u3057\u305f\u3089 5 \u79d2\u304f\u3089\u3044\u9593\u9694\u304c\u3042\u3044\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u753b\u9762\u66f4\u65b0\u304c\u547c\u3070\u308c\u308b\u305f\u3073\u306b\u3001
\n\u524d\u56de\u66f4\u65b0\u3057\u305f\u6642\u9593\u304b\u3089\u3001\u4f55\u30df\u30ea\u79d2\u7d4c\u904e\u3057\u3066\u3044\u308b\u304b\u3092\u8a08\u7b97\u3057\u3001
\n\u305d\u306e\u6642\u9593\u6642\u9593\u5206\u3060\u3051\u79fb\u52d5\u3055\u305b\u308b\u3001\u3068\u8a00\u3046\u3053\u3068\u3092\u3084\u3063\u3066\u3044\u307e\u3059\u3002
\n\uff08\u3064\u307e\u308a\u3001\u9577\u3044\u6642\u9593\u7d4c\u904e\u3057\u3066\u3044\u308c\u3070\u3001\u305d\u308c\u3060\u3051\u9577\u3044\u8ddd\u96e2\u3092\u79fb\u52d5\u3055\u305b\u308b\uff09<\/p>\n\u4eca\u56de\u306e\u5834\u5408\u30010.1 \u79d2\u3067 20 \u79fb\u52d5\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u306f 1 \u30df\u30ea\u79d2 = 0.001 \u79d2\u3067\u306f 0.2 \u3060\u3051\u79fb\u52d5\u3059\u308b\u306e\u3067\u3001
\ndiffMillisecond * 0.2<\/code> \u3067\u79fb\u52d5\u8ddd\u96e2\u3092\u7b97\u51fa\u3057\u3001\u524d\u56de\u306e x \u306e\u4f4d\u7f6e\u306b\u8db3\u3057\u3066
\n\u73fe\u5728\u306e\u4f4d\u7f6e\u3092\u6c42\u3081\u3066\u3044\u308b\u306e\u3067\u3059\u306d\u3002<\/p>\n\u4fee\u6b63\u7248\u3092\u5b9f\u884c\u3057\u305f\u7d50\u679c\u304c\u3053\u3061\u3089\u3002<\/p>\n
![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/anim-3-300x224.gif\")
<\/p>\ngif \u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306a\u306e\u3067\u308f\u304b\u308a\u306b\u304f\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001
\n\u5b9f\u969b\u306b\u624b\u5143\u3067\u30b3\u30fc\u30c9\u3092\u52d5\u304b\u3057\u3066\u3082\u3089\u3063\u305f\u3089
\n\u5148\u307b\u3069\u306e 0.1 \u79d2\u66f4\u65b0\u3088\u308a\u3001\u3059\u3054\u304f\u306a\u3081\u3089\u304b\u306b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3057\u3066\u3044\u308b\u4e8b\u304c\u5206\u304b\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\u5148\u307b\u3069\u306f\u5c11\u3057\u30ab\u30af\u30ab\u30af\u3060\u3063\u305f\u306e\u3067\u3001\u52d5\u3044\u3066\u3044\u308b\u611f\u304c\u5c11\u306a\u304b\u3063\u305f\u3067\u3059\u304c\u3001
\n\u3088\u308a\u9069\u5207\u306b\u66f4\u65b0\u3059\u308b\u3053\u3068\u3067\u3001\u3057\u3063\u304b\u308a\u52d5\u3044\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\u5bbf\u984c<\/h1>\n
\u4eca\u56de\u306f\u4ee5\u4e0a\u3067\u3059\uff01\u304a\u75b2\u308c\u69d8\u3067\u3057\u305f\uff01
\n\u4eca\u56de\u306f\u3001\u7269\u7406\u6f14\u7b97\u306a\u3069\u304c\u5165\u3063\u3066\u3044\u306a\u3044\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u57fa\u790e\u3092\u53d6\u308a\u6271\u3044\u307e\u3057\u305f\u3002<\/p>\n\u3067\u306f\u3001\u4eca\u56de\u306e\u5bbf\u984c\u306f\u3053\u308c\u3002<\/p>\n
- \n
- \u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\u8fd1\u3065\u3044\u3066\u53f3\u4e0b\u306b\u629c\u3051\u3066\u3044\u304f\u3088\u3046\u306b\u898b\u3048\u308b\u5186\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044<\/li>\n<\/ul>\n
![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2019\/08\/anim-4-300x224.gif\")
<\/p>\n\u5927\u4f53\u4f3c\u305f\u3088\u3046\u306a\u611f\u3058\u306b\u306a\u308c\u3070\u3001\u4e0a\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3068\u5168\u304f\u540c\u3058\u3067\u3042\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002
\n\u30dd\u30a4\u30f3\u30c8\u306f<\/p>\n- \n
- \u53f3\u65b9\u5411\u306b\u52d5\u304f<\/li>\n
- \u4e0b\u65b9\u5411\u306b\u52d5\u304f<\/li>\n
- \u5186\u304c\u5927\u304d\u304f\u306a\u308b<\/li>\n<\/ul>\n
\u306e\u4e09\u3064\u304c\u7d44\u307f\u5408\u308f\u3055\u3063\u3066\u3044\u308b\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3067\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002
\n\u3053\u306e 3 \u70b9\u304c\u5b9f\u65bd\u3067\u304d\u3066\u3044\u308c\u3070 OK\u3002<\/p>\n\u53f3\u65b9\u5411\u306b\u52d5\u304f\u306e\u306f\u30b5\u30f3\u30d7\u30eb\u3067\u5b9f\u65bd\u3057\u305f\u306e\u3067\u3001
\n\u3055\u3089\u306b\u305d\u3053\u306b\u4e0b\u65b9\u5411\u306e\u52d5\u304d\u3068\u3001\u5186\u306e\u5927\u304d\u3055\u306e\u52d5\u304d\u304c\u52a0\u308f\u308c\u3070\u3044\u3044\u3067\u3059\u306d\u3002<\/p>\n\u30d2\u30f3\u30c8\u3068\u3057\u3066\u306f\u3001<\/p>\n
\nctx.arc(\u4e2d\u5fc3\u306e x \u306e\u4f4d\u7f6e, \u4e2d\u5fc3\u306e y \u306e\u4f4d\u7f6e, \u5186\u306e\u534a\u5f84, 0, Math.PI*2, false)\n<\/pre>\n
arc \u3067\u63cf\u753b\u3059\u308b\u95a2\u6570\u306e\u5f15\u6570\u304c\u3001\u3053\u3093\u306a\u611f\u3058\u3067\u6307\u5b9a\u3067\u304d\u308b\u3053\u3068\u3092\u601d\u3044\u51fa\u305b\u305f\u3089\u3001
\n\u591a\u5206\u3046\u307e\u304f\u884c\u304f\u3093\u3058\u3083\u306a\u3044\u3067\u3057\u3087\u3046\u304b\uff01<\/p>\n\u305d\u308c\u3067\u306f\u307e\u305f\u6765\u9031\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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