web前端|html教程
CSS 属性的默认值
web前端-html教程
最近在看到一篇关于如何实现水平垂直居中，发现有许多属性值，自己并不了解，特此Google一番，查到，摘抄过来，方便以后查阅，下面是如何实现水平垂直居中的博文。
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解读CSS布局之-水平垂直居中
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html, address, blockquote, body, dd, div, dl, dt, fieldset, form, frame, frameset, h1, h2, h3, h4, h5, h6, noframes, ol, p, ul, center, dir, hr, menu, pre { display: block } li { display: list-item } head { display: none } table { display: table } tr { display: table-row } thead { display: table-header-group } tbody { display: table-row-group } tfoot { display: table-footer-group } col { display: table-column } colgroup { display: table-column-group } td, th { display: table-cell; } caption { display: table-caption } th { font-weight: bolder; text-align: center } caption { text-align: center } body { margin: 8px; line-height: 1.12 } h1 { font-size: 2em; margin: .67em 0 } h2 { font-size: 1.5em; margin: .75em 0 } h3 { font-size: 1.17em; margin: .83em 0 } h4, p, blockquote, ul, fieldset, form, ol, dl, dir, menu { margin: 1.12em 0 } h5 { font-size: .83em; margin: 1.5em 0 } h6 { font-size: .75em; margin: 1.67em 0 } h1, h2, h3, h4, h5, h6, b, strong { font-weight: bolder } blockquote { margin-left: 40px; margin-right: 40px } i, cite, em, var, address { font-style: italic } pre, tt, code, kbd, samp { font-family: monospace } pre { white-space: pre } button, textarea, input, object, select { display:inline-block; } big { font-size: 1.17em } small, sub, sup { font-size: .83em } sub { vertical-align: sub } sup { vertical-align: super } table { border-spacing: 2px; } thead, tbody, tfoot { vertical-align: middle } td, th { vertical-align: inherit } s, strike, del { text-decoration: line-through } hr { border: 1px inset } ol, ul, dir, menu, dd { margin-left: 40px } ol { list-style-type: decimal } ol ul, ul ol, ul ul, ol ol { margin-top: 0; margin-bottom: 0 } u, ins { text-decoration: underline } br:before { content: "\A" } :before, :after { white-space: pre-line } center { text-align: center } abbr, acronym { font-variant: small-caps; letter-spacing: 0.1em } :link, :visited { text-decoration: underline } :focus { outline: thin dotted invert } /* Begin bidirectionality settings (do not change) */ BDO[DIR="ltr"] { direction: ltr; unicode-bidi: bidi-override } BDO[DIR="rtl"] { direction: rtl; unicode-bidi: bidi-override } *[DIR="ltr"] { direction: ltr; unicode-bidi: embed } *[DIR="rtl"] { direction: rtl; unicode-bidi: embed } @media print { h1 { page-break-before: always } h1, h2, h3, h4, h5, h6 { page-break-after: avoid } ul, ol, dl { page-break-before: avoid }}
下面附上更全的W3C
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