|
| 1 | +# 高亮 |
| 2 | + |
| 3 | +## 代码块中的语法高亮 |
| 4 | + |
| 5 | +VuePress 使用了 [Prism](https://prismjs.com/) 来为 markdown 中的代码块实现语法高亮。Prism 支持大量的编程语言,你需要做的只是在代码块的开始倒勾中附加一个有效的语言别名: |
| 6 | + |
| 7 | +**输入** |
| 8 | + |
| 9 | +```` |
| 10 | +``` js |
| 11 | +export default { |
| 12 | + name: 'MyComponent', |
| 13 | + // ... |
| 14 | +} |
| 15 | +``` |
| 16 | +```` |
| 17 | + |
| 18 | +**输出** |
| 19 | + |
| 20 | +``` js |
| 21 | +export default { |
| 22 | + name: 'MyComponent', |
| 23 | + // ... |
| 24 | +} |
| 25 | +``` |
| 26 | + |
| 27 | +**输入** |
| 28 | + |
| 29 | +```` |
| 30 | +``` html |
| 31 | +<ul> |
| 32 | + <li |
| 33 | + v-for="todo in todos" |
| 34 | + :key="todo.id" |
| 35 | + > |
| 36 | + {{ todo.text }} |
| 37 | + </li> |
| 38 | +</ul> |
| 39 | +``` |
| 40 | +```` |
| 41 | + |
| 42 | +**输出** |
| 43 | + |
| 44 | +``` html |
| 45 | +<ul> |
| 46 | + <li |
| 47 | + v-for="todo in todos" |
| 48 | + :key="todo.id" |
| 49 | + > |
| 50 | + {{ todo.text }} |
| 51 | + </li> |
| 52 | +</ul> |
| 53 | +``` |
| 54 | + |
| 55 | +在 Prism 的网站上查看 [合法的语言列表](https://prismjs.com/#languages-list)。 |
| 56 | + |
| 57 | + |
| 58 | +## 代码块中的行高亮 |
| 59 | + |
| 60 | +**输入** |
| 61 | + |
| 62 | +```` |
| 63 | +``` js {4} |
| 64 | +export default { |
| 65 | + data () { |
| 66 | + return { |
| 67 | + msg: 'Highlighted!' |
| 68 | + } |
| 69 | + } |
| 70 | +} |
| 71 | +``` |
| 72 | +```` |
| 73 | + |
| 74 | +**输出** |
| 75 | + |
| 76 | +``` js{4} |
| 77 | +export default { |
| 78 | + data () { |
| 79 | + return { |
| 80 | + msg: 'Highlighted!' |
| 81 | + } |
| 82 | + } |
| 83 | +} |
| 84 | +``` |
| 85 | + |
| 86 | +除了单行以外,你也可指定多行,行数区间,或是两者都指定。 |
| 87 | + |
| 88 | +- 行数区间: 例如 `{5-8}`, `{3-10}`, `{10-17}` |
| 89 | +- 多个单行: 例如 `{4,7,9}` |
| 90 | +- 行数区间与多个单行: 例如 `{4,7-13,16,23-27,40}` |
| 91 | + |
| 92 | +**Input** |
| 93 | + |
| 94 | +```` |
| 95 | +``` js{1,4,6-7} |
| 96 | +export default { // Highlighted |
| 97 | + data () { |
| 98 | + return { |
| 99 | + msg: `Highlighted! |
| 100 | + This line isn't highlighted, |
| 101 | + but this and the next 2 are.`, |
| 102 | + motd: 'VuePress is awesome', |
| 103 | + lorem: 'ipsum', |
| 104 | + } |
| 105 | + } |
| 106 | +} |
| 107 | +``` |
| 108 | +```` |
| 109 | + |
| 110 | +**Output** |
| 111 | + |
| 112 | +``` js{1,4,6-8} |
| 113 | +export default { // Highlighted |
| 114 | + data () { |
| 115 | + return { |
| 116 | + msg: `Highlighted! |
| 117 | + This line isn't highlighted, |
| 118 | + but this and the next 2 are.`, |
| 119 | + motd: 'VuePress is awesome', |
| 120 | + lorem: 'ipsum', |
| 121 | + } |
| 122 | + } |
| 123 | +} |
| 124 | +``` |
| 125 | + |
| 126 | +## 行号 |
| 127 | + |
| 128 | +你可以通过配置来为每个代码块显示行号: |
| 129 | + |
| 130 | +``` js |
| 131 | +module.exports = { |
| 132 | + markdown: { |
| 133 | + lineNumbers: true |
| 134 | + } |
| 135 | +} |
| 136 | +``` |
| 137 | + |
| 138 | +<!-- TODO Support line numbers for specific fence block --> |
| 139 | + |
| 140 | +- 示例: |
| 141 | + |
| 142 | +<picture> |
| 143 | + <source srcset="/line-numbers-desktop.png" media="(min-width: 719px)"> |
| 144 | + <img class="line-numbers-desktop-snap" alt="Image"> |
| 145 | +</picture> |
| 146 | + |
| 147 | +<picture> |
| 148 | + <source srcset="/line-numbers-mobile.gif" media="(max-width: 719px)"> |
| 149 | + <img class="line-numbers-mobile-snap" alt="Image"> |
| 150 | +</picture> |
| 151 | + |
| 152 | +<style> |
| 153 | + @media screen and (min-width: 719px) { |
| 154 | + .line-numbers-mobile-snap { |
| 155 | + display: none; |
| 156 | + } |
| 157 | + } |
| 158 | + @media screen and (max-width: 719px) { |
| 159 | + .line-numbers-desktop-snap { |
| 160 | + display: none; |
| 161 | + } |
| 162 | + .line-numbers-mobile-snap { |
| 163 | + max-width: none!important; |
| 164 | + margin: 0 -1.5rem; |
| 165 | + width: 100vw; |
| 166 | + } |
| 167 | + } |
| 168 | +</style> |
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