{"id":58030,"date":"2018-06-12T18:57:21","date_gmt":"2018-06-12T09:57:21","guid":{"rendered":"https:\/\/www.sejuku.net\/blog\/?p=58030"},"modified":"2025-09-04T10:39:14","modified_gmt":"2025-09-04T01:39:14","slug":"%e3%80%90css%e3%80%91%e8%a1%a8%e7%a4%ba%e5%b4%a9%e3%82%8c%e3%82%82%e3%81%93%e3%82%8c%e3%81%a7%e8%a7%a3%e6%b1%ba-box-sizing%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/58030","title":{"rendered":"CSS\u306ebox-sizing\u3067\u8868\u793a\u5d29\u308c\u3092\u30d0\u30c3\u30c1\u30ea\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\uff01 \u30e9\u30a4\u30bf\u30fc\u306e\u30ca\u30ca\u30df\u3067\u3059\u3002<\/p>\n

\u307f\u306a\u3055\u3093WEB\u30b5\u30a4\u30c8\u3092\u4f5c\u3063\u3066\u3044\u3066\u3001<\/p>\n

\u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u5d29\u308c\u305f\u2026
\n\u5e45\u3068\u304b\u9ad8\u3055\u304c\u5408\u308f\u306a\u3044\u2026<\/strong><\/span><\/p>\n

\u306a\u3093\u3066\u30a2\u30af\u30b7\u30c7\u30f3\u30c8\u306b\u898b\u821e\u308f\u308c\u305f\u308a\u3057\u3066\u3044\u307e\u305b\u3093\u304b\uff1f<\/p>\n

\u4eca\u56de\u306f\u305d\u3093\u306a\u30a2\u30af\u30b7\u30c7\u30f3\u30c8\u3092\u89e3\u6c7a\u3057\u3066\u304f\u308c\u308b\u3001box-sizing<\/strong><\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u306f\u4e0b\u8a18\u306e\u6d41\u308c\u3067\u9032\u3081\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u3010\u57fa\u790e\u3011<\/strong><\/span>box-sizing\u3068\u306f\u4f55\u304b
\n\u3010\u57fa\u790e\u3011<\/strong><\/span>box-sizing\u306e\u4f7f\u3044\u65b9
\n\u3010\u767a\u5c55\u3011<\/strong><\/span>box-sizing\u306e\u4f7f\u7528\u4f8b<\/div>\n

\u3070\u3063\u3061\u308a\u899a\u3048\u3066\u3001\u30ec\u30a4\u30a2\u30a6\u30c8\u5d29\u308c\u306a\u3093\u304b\u306b\u8ca0\u3051\u306a\u3044\u30b5\u30a4\u30c8\u3092\u4f5c\u3063\u3061\u3083\u3044\u307e\u3057\u3087\u3046\uff01<\/p>\n

box-sizing\u3068\u306f\uff1f<\/h2>\n

box-sizing<\/strong><\/span>\u306f\u3001\u8981\u7d20\u306e\u5927\u304d\u3055\u306e\u6c7a\u307e\u308a\u65b9\u3092\u6307\u5b9a\u3059\u308b<\/strong><\/span>\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002<\/p>\n

\u4e0b\u8a18\u306e\u753b\u50cf\u306f\u3001\u3069\u3061\u3089\u3082\u5e45200px\u3001\u9ad8\u3055200px\u3001padding20px\u3001\u67a0\u7dda5px\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\"box-sizing1\"<\/div>\n

\u5927\u304d\u3055\u304c\u5168\u7136\u9055\u3044\u307e\u3059\u306d\u3002<\/p>\n

\u3053\u308c\u306f\u3001\u8981\u7d20\u306e\u5e45\u3068\u9ad8\u3055\u306e\u6570\u5024\u306b\u3001padding\u3068\u7dda\u306e\u592a\u3055\u306e\u6570\u5024\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u304b\u306e\u9055\u3044\u3067\u3059\u3002<\/p>\n

\"box-sizing2\"<\/div>\n

\u3064\u307e\u308abox-sizing\u306f\u3001padding\u3068\u7dda\u306e\u592a\u3055\u3092\u8981\u7d20\u306e\u5927\u304d\u3055\u306b\u542b\u3081\u308b\u306e\u304b\u542b\u3081\u306a\u3044\u306e\u304b<\/strong><\/span>\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n

\u305d\u3082\u305d\u3082padding\u3084\u7dda\u3068\u306f\uff1f<\/h3>\n

\u8981\u7d20\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306b\u3001\u5916\u5074\u306e\u9818\u57df<\/strong><\/span>\u3001\u7dda\u306e\u9818\u57df<\/strong><\/span>\u3001\u5185\u5074\u306e\u9818\u57df<\/strong><\/span>\u3001\u6587\u5b57\u306a\u3069\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u81ea\u4f53<\/strong><\/span>\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\"box-sizing3\"<\/div>\n

padding<\/strong><\/span>\u306f\u3001\u3053\u306e\u5185\u5074\u306e\u8981\u7d20\u306b\u4f59\u767d\u3092\u3064\u3051\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002
\n\u7dda\u306e\u9818\u57df\u306f\u3001border<\/strong><\/span>\u3092\u6307\u5b9a\u3057\u305f\u3068\u304d\u306b\u7dda\u304c\u5f15\u304b\u308c\u308b\u90e8\u5206\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001\u5e45\u3084\u9ad8\u3055\u3092\u6307\u5b9a\u306f\u30b3\u30f3\u30c6\u30f3\u30c4\u81ea\u4f53\u306b\u4ed8\u4e0e\u3055\u308c\u307e\u3059\u3002
\npadding\u3084border\u306f\u542b\u3081\u306a\u3044\u306e\u3067\u3059\u3002<\/strong><\/span><\/p>\n

\u3057\u304b\u3057box-sizing\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u3053\u306e\u4ed5\u7d44\u307f\u3092\u5909\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\npadding\u3082\u7dda\u3082\u542b\u3081\u3066\u3001\u6307\u5b9a\u3057\u305f\u5e45\u3084\u9ad8\u3055\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/strong><\/span><\/p>\n

\"box-sizing4\"<\/div>\n

\u5bfe\u5fdc\u30d6\u30e9\u30a6\u30b6<\/h3>\n

\u73fe\u5728\u306e\u30ab\u30ec\u30f3\u30c8\u30d6\u30e9\u30a6\u30b6\u3067\u306f\u3001\u554f\u984c\u306a\u304f\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/strong><\/span>\u3002
\n\u30aa\u30fc\u30eb\u30c9\u30d6\u30e9\u30a6\u30b6\u3082IE9\u304b\u3089\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u73fe\u5728\u4f7f\u3046\u5206\u306b\u306f\u554f\u984c\u306a\u3044\u3067\u3059\u306d\u3002<\/p>\n

\u3069\u3046\u3057\u3066\u3082IE8\u306a\u3069\u306e\u304b\u306a\u308a\u53e4\u3044\u30d6\u30e9\u30a6\u30b6\u3078\u306e\u5bfe\u5fdc\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u30d9\u30f3\u30c0\u30fc\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9<\/strong><\/span>\u3092\u3064\u3051\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002
\n\u8a18\u8ff0\u306e\u982d\u306b\u300c-ms-\u300d<\/strong><\/span>\u3068\u3064\u3051\u308c\u3070OK\u3067\u3059\u3002<\/p>\n

box-sizing\u306e\u4f7f\u3044\u65b9<\/h2>\n

box-sizing<\/strong><\/span>\u306f\u3001\u30b5\u30a4\u30ba\u306e\u6c7a\u307e\u308a\u65b9\u3092\u5909\u3048\u305f\u3044\u8981\u7d20\u306b\u6307\u5b9a\u3059\u308b\u3060\u3051<\/strong><\/span>\u3067OK\u3067\u3059\u3002<\/p>\n

\u57fa\u672c\u5f62\u306f\u3053\u3093\u306a\u611f\u3058\u3002<\/p>\n

CSS<\/p>\n

\u30bb\u30ec\u30af\u30bf {\n    box-sizing: \u5024;\n}\n<\/pre>\n
\u5024\u306e\u90e8\u5206\u3067\u3001\u5927\u304d\u3055\u306e\u6c7a\u307e\u308a\u65b9\u3092\u5207\u308a\u66ff\u3048\u3066\u3044\u304d\u307e\u3059\u3002
\n\u4e0b\u8a18\u306eHTML\u3001CSS\u3092\u57fa\u672c\u306b\u3057\u3066\u3001\u305d\u308c\u305e\u308c\u3069\u3093\u306a\u898b\u6804\u3048\u306b\u306a\u308b\u306e\u304b\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\"box-sizing5\"<\/div>\n
HTML<\/p>\n
<div class=\"box_test\">\n    padding\u3068\u67a0\u7dda\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u8981\u7d20\n<\/div>\n<div class=\"box_test2\">\n    \u5e45\u30fb\u9ad8\u3055\u304c200px\u306e\u8981\u7d20\n<\/div>\n<\/pre>\n
CSS<\/p>\n
.box_test {\n    height:  200px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  200px;              \/* \u5e45\u6307\u5b9a *\/\n    padding:  20px;             \/* \u4f59\u767d\u6307\u5b9a *\/\n    border:  solid 5px;         \/* \u67a0\u7dda\u6307\u5b9a *\/\n    background-color: #F44336;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    display:  inline-block;     \/* \u30a4\u30f3\u30e9\u30a4\u30f3\u30d6\u30ed\u30c3\u30af\u306b\u3059\u308b *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n}\n\n.box_test2 {\n    height:  200px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  200px;              \/* \u5e45\u6307\u5b9a *\/\n    background-color: #2196F3;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    display:  inline-block;     \/* \u30a4\u30f3\u30e9\u30a4\u30f3\u30d6\u30ed\u30c3\u30af\u306b\u3059\u308b *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n}\n\n<\/pre>\n
padding\u3084\u7dda\u3092\u5927\u304d\u3055\u306b\u542b\u3081\u306a\u3044\uff1acontent-box<\/h3>\n
content-box<\/strong><\/span>\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3001padding\u3084\u7dda\u306f\u5e45\u3084\u9ad8\u3055\u306b\u542b\u307e\u308c\u306a\u3044\u72b6\u614b<\/strong><\/span>\u306b\u306a\u308a\u307e\u3059\u3002
\n\u3053\u308c\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u3059\u306d\u3002<\/p>\n
\"box-sizing5\"<\/div>\n
CSS<\/p>\n
.box_test {\n    box-sizing:  content-box;\n}\n<\/pre>\n
\u3053\u306e\u72b6\u614b\u3060\u3068\u3001\u7dda\u307e\u3067\u542b\u3081\u305f\u5927\u304d\u3055\u306f250px\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
padding\u3084\u7dda\u3092\u5927\u304d\u3055\u306b\u542b\u3081\u308b\uff1aborder-box<\/h3>\n
border-box<\/strong><\/span>\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3001content-box\u3068\u306f\u9006\u306e\u72b6\u614b\u306b\u306a\u308a\u307e\u3059\u3002
\n\u3064\u307e\u308a\u3001padding\u3084\u7dda\u304c\u5e45\u3001\u9ad8\u3055\u306b\u542b\u307e\u308c\u308b\u72b6\u614b<\/strong><\/span>\u306b\u306a\u308b\u306e\u3067\u3059\u3002<\/p>\n
\"box-sizing6\"<\/div>\n
CSS<\/p>\n
.box_test {\n    box-sizing: border-box;\n}\n<\/pre>\n
\u3053\u306e\u72b6\u614b\u3060\u3068\u3001\u8981\u7d20\u306e\u5927\u304d\u3055\u306f\u6307\u5b9a\u3055\u308c\u305f\u5e45\u3001\u9ad8\u3055\u3068\u540c\u3058\u306b\u306a\u308a\u307e\u3059\u3002
\n\u7dda\u3092\u542b\u3081\u3066\u3001\u7e26\u3082\u6a2a\u3082200px\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u306d\u3002<\/p>\n
box-sizing\u306e\u4f7f\u7528\u4f8b<\/h2>\n
box-sizing\u3001\u3068\u3063\u3066\u3082\u4fbf\u5229\u306a\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002
\n\u3069\u3093\u306a\u6642\u306b\u5a01\u529b\u3092\u767a\u63ee\u3059\u308b\u306e\u304b\u3001\u5177\u4f53\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u5927\u304d\u3055\u3092\u63c3\u3048\u3066\u6307\u5b9a\u3057\u305f\u3044<\/h3>\n
\"box-sizing-ex1\"<\/div>\n
HTML<\/p>\n
<div class=\"box_test\">\n    padding10px\n<\/div>\n<div class=\"box_test2\">\n    padding30px\n<\/div>\n<div class=\"box_test3\">\n    padding50px\n<\/div>\n<\/pre>\n
CSS<\/p>\n
.box_test {\n    height:  200px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  200px;              \/* \u5e45\u6307\u5b9a *\/\n    padding:  10px;             \/* \u4f59\u767d\u6307\u5b9a *\/\n    background-color: #F44336;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    display:  inline-block;     \/* \u30a4\u30f3\u30e9\u30a4\u30f3\u30d6\u30ed\u30c3\u30af\u306b\u3059\u308b *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n    box-sizing: border-box;     \/* \u4f59\u767d\u3084\u7dda\u3092\u5e45\u3068\u9ad8\u3055\u306b\u542b\u3081\u308b *\/\n}\n\n.box_test2 {\n    height:  200px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  200px;              \/* \u5e45\u6307\u5b9a *\/\n    padding:  30px;             \/* \u4f59\u767d\u6307\u5b9a *\/\n    background-color: #2196F3;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    display:  inline-block;     \/* \u30a4\u30f3\u30e9\u30a4\u30f3\u30d6\u30ed\u30c3\u30af\u306b\u3059\u308b *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n    box-sizing: border-box;     \/* \u4f59\u767d\u3084\u7dda\u3092\u5e45\u3068\u9ad8\u3055\u306b\u542b\u3081\u308b *\/\n}\n\n.box_test3 {\n    height:  200px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  200px;              \/* \u5e45\u6307\u5b9a *\/\n    padding:  50px;             \/* \u4f59\u767d\u6307\u5b9a *\/\n    background-color: #009688;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    display:  inline-block;     \/* \u30a4\u30f3\u30e9\u30a4\u30f3\u30d6\u30ed\u30c3\u30af\u306b\u3059\u308b *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n    box-sizing: border-box;     \/* \u4f59\u767d\u3084\u7dda\u3092\u5e45\u3068\u9ad8\u3055\u306b\u542b\u3081\u308b *\/\n}\n<\/pre>\n
padding\u306f\u30d0\u30e9\u30d0\u30e9\u3060\u3051\u3069\u3001\u8981\u7d20\u81ea\u4f53\u306f\u540c\u3058\u5927\u304d\u3055\u3067\u914d\u7f6e\u3057\u305f\u3044\u2026<\/strong><\/p>\n
\u306a\u3093\u3066\u3061\u3087\u3063\u3068\u308f\u304c\u307e\u307e\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u3067\u3082\u3001box-sizing:content-box<\/strong><\/span>\u3067\u30d0\u30c3\u30c1\u30ea\u3067\u3059\u3002<\/p>\n
\u6a2a\u4e26\u3073\u306b\u3057\u305f\u3068\u304d\u306b\u5d29\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u305f\u3044<\/h3>\n
\"box-sizing-ex2\"<\/div>\n
HTML<\/p>\n
<div class=\"box_test\">\n    \u30b5\u30a4\u30c9\u30d0\u30fc\n<\/div>\n<div class=\"box_test2\">\n    \u30e1\u30a4\u30f3\u30b3\u30f3\u30c6\u30f3\u30c4\n<\/div>\n<\/pre>\n
CSS<\/p>\n
.box_test {\n    height:  400px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  200px;              \/* \u5e45\u6307\u5b9a *\/\n    padding:  20px;             \/* \u4f59\u767d\u6307\u5b9a *\/\n    background-color: #F44336;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    display:  inline-block;     \/* \u30a4\u30f3\u30e9\u30a4\u30f3\u30d6\u30ed\u30c3\u30af\u306b\u3059\u308b *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n    box-sizing: border-box;     \/* \u4f59\u767d\u3084\u7dda\u3092\u5e45\u3068\u9ad8\u3055\u306b\u542b\u3081\u308b *\/\n}\n\n.box_test2 {\n    height:  400px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  400px;              \/* \u5e45\u6307\u5b9a *\/\n    padding:  20px;             \/* \u4f59\u767d\u6307\u5b9a *\/\n    background-color: #2196F3;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    display:  inline-block;     \/* \u30a4\u30f3\u30e9\u30a4\u30f3\u30d6\u30ed\u30c3\u30af\u306b\u3059\u308b *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n    box-sizing: border-box;     \/* \u4f59\u767d\u3084\u7dda\u3092\u5e45\u3068\u9ad8\u3055\u306b\u542b\u3081\u308b *\/\n}\n<\/pre>\n
\u30b5\u30a4\u30c9\u30d0\u30fc\u306f200px\u3001\u30e1\u30a4\u30f3\u30b3\u30f3\u30c6\u30f3\u30c4\u306f400px\u3067\u5d29\u3057\u305f\u304f\u306a\u3044\uff01<\/strong><\/p>\n
\u306a\u3093\u3066\u6642\u306b\u3082box-sizing:content-box<\/strong><\/span>\u3002
\n\u3053\u306e\u3088\u3046\u306b\u7dba\u9e97\u306b\u914d\u7f6e\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u5e45\u3084padding\u3092\uff05\u3067\u6307\u5b9a\u3057\u305f\u3044<\/h3>\n
\"box-sizing-ex3\"<\/div>\n
HTML<\/p>\n
<div class=\"box_test\">\n    \u5e4520%\n<\/div>\n<div class=\"box_test2\">\n    \u5e4580%\n<\/div>\n<\/pre>\n
CSS<\/p>\n
.box_test {\n    height:  400px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  20%;                \/* \u5e45\u6307\u5b9a *\/\n    padding:  2%;               \/* \u4f59\u767d\u6307\u5b9a *\/\n    background-color: #F44336;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n    box-sizing: border-box;     \/* \u4f59\u767d\u3084\u7dda\u3092\u5e45\u3068\u9ad8\u3055\u306b\u542b\u3081\u308b *\/\n    float: left;                \/* \u6a2a\u4e26\u3073\u306b\u3059\u308b *\/\n}\n\n.box_test2 {\n    height:  400px;             \/* \u9ad8\u3055\u6307\u5b9a *\/\n    width:  80%;                \/* \u5e45\u6307\u5b9a *\/\n    padding:  2%;               \/* \u4f59\u767d\u6307\u5b9a *\/\n    background-color: #2196F3;  \/* \u80cc\u666f\u8272\u6307\u5b9a *\/\n    vertical-align:  bottom;    \/* \u4e0b\u63c3\u3048\u306b\u3059\u308b *\/\n    box-sizing: border-box;     \/* \u4f59\u767d\u3084\u7dda\u3092\u5e45\u3068\u9ad8\u3055\u306b\u542b\u3081\u308b *\/\n    float:  left;               \/* \u6a2a\u4e26\u3073\u306b\u3059\u308b *\/\n}\n<\/pre>\n
\u30d1\u30fc\u30bb\u30f3\u30c8\u3067\u5e45\u306a\u3069\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u753b\u9762\u304c\u7e2e\u3093\u3060\u6642\u306b\u30ac\u30af\u30f3\u3068\u5d29\u308c\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3088\u306d\u2026<\/p>\n
\u3053\u3093\u306a\u6642\u306b\u3082box-sizing:content-box<\/strong><\/span>\uff01
\npadding\u306e\u305b\u3044\u3067\u8981\u7d20\u306e\u6bd4\u7387\u304c\u5909\u308f\u308b\u3001\u306a\u3093\u3066\u3053\u3068\u304c\u306a\u304f\u306a\u308b\u306e\u3067\u5b89\u5fc3\u3057\u3066\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u307e\u3068\u3081<\/h2>\n
\u3044\u304b\u304c\u3067\u3057\u305f\u304b\uff1f<\/p>\n
box-sizing:content-box<\/strong><\/span>\u3001\u6a2a\u4e26\u3073\u30ec\u30a4\u30a2\u30a6\u30c8\u306e\u5f37\u3044\u5473\u65b9<\/strong><\/span>\u3067\u3059\u3002
\n\u305c\u3072\u6d3b\u7528\u3057\u3066\u3001\u5d29\u308c\u77e5\u3089\u305a\u306e\u7d20\u6575\u30b5\u30a4\u30c8\u3092\u4f5c\u3063\u3066\u304f\u3060\u3055\u3044\u306d\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u3093\u306b\u3061\u306f\uff01 \u30e9\u30a4\u30bf\u30fc\u306e\u30ca\u30ca\u30df\u3067\u3059\u3002 \u307f\u306a\u3055\u3093WEB\u30b5\u30a4\u30c8\u3092\u4f5c\u3063\u3066\u3044\u3066\u3001 \u30ec\u30a4\u30a2\u30a6\u30c8\u304c\u5d29\u308c\u305f\u2026 \u5e45\u3068\u304b\u9ad8\u3055\u304c\u5408\u308f\u306a\u3044\u2026 \u306a\u3093\u3066\u30a2\u30af\u30b7\u30c7\u30f3\u30c8\u306b\u898b\u821e\u308f\u308c\u305f\u308a\u3057\u3066\u3044\u307e\u305b\u3093\u304b\uff1f \u4eca\u56de\u306f\u305d\u3093\u306a\u30a2\u30af\u30b7\u30c7\u30f3\u30c8\u3092\u89e3\u6c7a\u3057\u3066\u304f\u308c\u308b\u3001box- […]<\/p>\n","protected":false},"author":4,"featured_media":71632,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"swell_btn_cv_data":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-58030","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-others"],"acf":[],"yoast_head":"\nCSS\u306ebox-sizing\u3067\u8868\u793a\u5d29\u308c\u3092\u30d0\u30c3\u30c1\u30ea\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5 | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c CSS\u306ebox-sizing\u3067\u8868\u793a\u5d29\u308c\u3092\u30d0\u30c3\u30c1\u30ea\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5 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property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/sejuku2013\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/sejuku2013\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-06-12T09:57:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-04T01:39:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/09\/css_eye.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u7de8\u96c6\u90e8\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/twitter.com\/samuraijuku\" \/>\n<meta name=\"twitter:site\" content=\"@samuraijuku\" \/>\n<script type=\"application\/ld+json\" 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