可以看到 box-sizing 屬性能用在任何元素，而且初始值為 content-box 。 在CSS box model 中，對元素指定寬度和高度會應用於content box，如果又在該元素 ... ... <看更多>

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It may be because your "score-board" is an inline element (a span, label...), or it was made inline by another CSS rule, and inside it there ... ... <看更多>

box -sizing - with form and input field. ... dabblet.css ... textarea {width:70%;background:orange;float:left;box-sizing:border-box;height:38px;} ... ... <看更多>