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'CSS Book for Everyone' Chapter 3: Fonts and Text_html/css_WEB-ITnose

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Release: 2016-06-24 11:54:07
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1. Font and text

The difference between font and text:

  • Font mainly involves the size and appearance of text (can be applied to a single character) .

  • Text mainly involves the processing of fonts (can only be applied to text blocks)

  • 2. Specify fonts

    Specify fonts in CSS The simplest way is to use a collection of five common fonts

  • serif: This font has small details called serifs at the ends of character strokes (Time New Roman, Georgia, Palatino)

  • sans-serif: No details at the end (Trebuchet MS, Arial, Verdana)

  • monospace: Each letter has equal width (e.g. i and m have same width), usually used to typeset code blocks or imitate printing effects

  • cursive: handwritten notes, but neater than handwriting (Comic Sans MS, Brush Script)

  • fantasy: fonts that cannot be classified into other types

  • /*指定通用字体,浏览器会选择默认的Helvetica或者Arial*//*font-family是一个可继承的属性,值会传递给所有的后代*/body {font-family: sans-serif;} /*以首先字母为开头,以通用字体结束 */body{font-family: "hoefler text",times,serif;}
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    3. Set font size

    To set the font size, you can use three types of values:

  • Absolute value: pixels, inches
  • Relative value: percentage, em
  • Sweatshirt size keywords: x-small, small, large, xx-large
  • Advantages of using relative size fonts:

  • Select larger or smaller in text size After that, all fonts scale proportionally

  • Just change the font size of the body tag and proportionally change the size of the text

  • Use relative size fonts Disadvantages

  • Possible display of extremely small fonts due to font size inheritance

  • Users can easily "break" CSS pages that do not take text scaling into account Layout

  • body{    font-family: verdana,arial,sans-serif;    /*为字体设置了可以调准的基准大小,1em一般为16像素高*/    font-size: 1em;} h3{    /*h3的默认大小为1.2em(19.2px),重新设置为0.8em*/    font-size: 0.8em;} /*分别为ol和ul设置大小,而不是为li设置大小,方便后续自定义*/ol{font-size: .75em;}ul{font-size: .75em;} a {font-size: .7em;}/*规定ul的子元素a从父元素中继承属性值(如果没有使用inherit,a的值就会变成0.75*0.7em,导致过小*/ul a {font-size: inherit;}
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    4. Font attributes

    font-style 定义文本的直立或倾斜 italic、normal、oblique
    font-weight 定义文本的粗细 100、200、…、900、lighter、normal、bold、bolder
    font-variant 转换成小型大写字母 small-caps、normal

    /*font-style有两个作用:使字体倾斜,或者使倾斜的字体直立*/p {font-style: italic;}span {font-style: normal;} /*加粗超链接的内容*/a{font-weight: bold;} /*将h3标题转换为小型大写字母*/h3{font-variant: small-caps;}
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    5. Abbreviation of font attributes

    p {    /*始终要保证声明font-size 和 font-family的值*/    /*指定顺序:先指定font-weight、font-style、font-variant(任意顺序),然后依次指定font-size、font-family*/    font:bold italic small-caps .75em verdana, arial, sans-serif;}
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    6. CSS snake text

    CSS will place a box around the text located in the element, closed only at the beginning and end

  • text-indent can only indent the first line

  • To indent the entire paragraph, you need to use margin-left to push the entire container to the right

  • 7. Text attributes

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    text-indent

    缩进元素中文本的首行

    任何长度值

    vertical-align

    相对于基准线将文本向上或者向下方移动

    任何长度值、sup、sub、top、middle、bottom

    letter-spacing

    设置字符间距

    任何长度值

    word-spacing

    设置字间距

    任何长度值

    text-decoration

    向文本添加修饰

    none、underline、overline、line-through、blink

    text-align

    使文本与包含元素对齐

    left、right、center、justify

    line-height

    设置行高(行与行基准线之间的距离)

    任何数字值(不需要指定单位)

    text-transform

    改变元素中文本的大小写形式

    uppercase、lowercase、capitalize、none 

    text-indent

    Indent the first line of text in the element

    Any length value

    /*缩进首行文本*/p {text-indent: 3em;} /*为段落指定一个大于负缩进值的正左外边距,产生悬挂段落的效果*/p {    text-indent: -1.5em;    margin-left: 2em;    border: 1px solid red;} /*设置字符间距*/p{    letter-spacing: .2em;} /*设置单词间距*/p{    word-spacing: .2em;} /*去掉文本的下划线*/a{    text-decoration: none;} /*需要在包含元素上设置text-align属性,使其子元素内容对齐*/div {    text-align: right;} /*设置行高*/p{    line-height: 1.5;}div#intro {    /*行高设置为字体的1.4倍*/    /*行高比文本高出的部分,会再文本的上方和下方平均分配*/    font:1.2em/1.4;} /*将每个单词的首字母变成大写*/p{    text-transform: capitalize;} p{    vertical-align: 50%}
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    vertical-align

    Align text up or down relative to the baseline Move below Any length value, sup, sub, top, middle, bottom

    letter- spacing

    Set character spacing

    Any length value

    word-spacing

    Set word spacing

    Any length value

    text-decoration

    Add decoration to text none, underline, overline, line-through , blink
    text-align Align text with the containing element left, right, center, justify
    line-height Set the row height (the distance between the row and the row baseline) Any numeric value (no need to specify units)
    text-transform Change the case of text in an element uppercase, lowercase, capitalize, none