HTML标签的默认CSS样式

在html中，即使我们没有指定页面元素显示的css样式，元素也会按照默认的的标准css样式去显示。因此掌握基本的html标签可以在一定程度上精简你的css代码，现将html标签的默认属性进行一定的汇总如下：

1	li              { display: list-item }

2	head            { display: none }

3	table           { display: table }

4	tr              { display: table-row }

5	thead           { display: table-header-group }

6	tbody           { display: table-row-group }

7	tfoot           { display: table-footer-group }

8	col             { display: table-column }

9	colgroup        { display: table-column-group }

10	td, th          { display: table-cell; }

11	caption         { display: table-caption }

12	th              { font-weight: bolder; text-align: center }

13	caption         { text-align: center }

14	body            { margin: 8px; line-height: 1.12 }

15	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 }

16	h4, p,blockquote, ul,fieldset, form,ol, dl, dir,menu            { margin: 1.12em 0 }

17	h1              { font-size: 2em; margin: .67em 0 }

18	h2              { font-size: 1.5em; margin: .75em 0 }

19	h3              { font-size: 1.17em; margin: .83em 0 }

20	h5              { font-size: .83em; margin: 1.5em 0 }

21	h6              { font-size: .75em; margin: 1.67em 0 }

22	h1, h2, h3, h4,h5, h6, b,strong          { font-weight: bolder }

23	blockquote      { margin-left: 40px; margin-right: 40px }

24	i, cite, em, var, address    { font-style: italic }

25	pre, tt, code, kbd, samp     { font-family: monospace }

26	pre             { white-space: pre }

27	button, textarea, input, object, select          { display:inline-block; }

28	big             { font-size: 1.17em }

29	small, sub, sup { font-size: .83em }

30	sub             { vertical-align: sub }

31	sup             { vertical-align: super }

32	table           { border-spacing: 2px; }

33	thead, tbody, tfoot           { vertical-align: middle }

34	td, th          { vertical-align: inherit }

35	s, strike, del  { text-decoration: line-through }

36	hr              { border: 1px inset }

37	ol, ul, dir, menu, dd        { margin-left: 40px }

38	ol              { list-style-type: decimal }

39	ol ul, ul ol, ul ul, ol ol    { margin-top: 0; margin-bottom: 0 }

40	u, ins          { text-decoration: underline }

41	br:before       { content: “\A” }

42	:before, :after { white-space: pre-line }

43

44	center          { text-align: center }

45	abbr, acronym   { font-variant: small-caps; letter-spacing: 0.1em }

46	:link, :visited { text-decoration: underline }

47	:focus          { outline: thin dotted invert }

48

49	@media print {

50	h1            { page-break-before: always }

51	h1, h2, h3,h4, h5, h6    { page-break-after: avoid }

52	ul, ol, dl    { page-break-before: avoid }

53

}

54

55	BDO[DIR="ltr"]  { direction: ltr; unicode-bidi: bidi-override }

56	BDO[DIR="rtl"]  { direction: rtl; unicode-bidi: bidi-override }

57

58	*[DIR="ltr"]    { direction: ltr; unicode-bidi: embed }

59	*[DIR="rtl"]    { direction: rtl; unicode-bidi: embed }

当我们预想的css样式和默认样式一致时，我们就不必浪费不必要的css代码在那些页面元素上了，从而达到css代码的精简！