[zh-cn] create translation of 'input boundary assertion'#35019
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files/zh-cn/web/javascript/reference/regular_expressions/input_boundary_assertion/index.md
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(comment last updated: 2026-04-10 05:54:46) |
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| @@ -39,9 +39,7 @@ console.log(text.match(regexpFoxQuality)); | |||
| <td><code>^</code></td> | |||
| <td> | |||
| <p> | |||
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L6 which indicate the beginnings and endings of lines and words, and other patterns indicating in some way that a match is possible (including look-ahead, look-behind, and conditional expressions).
似乎前译者的翻译把两个部分混淆到一块了？
| 匹配输入的开头。如果多行模式设为 true，<code>^</code> | ||
| 在换行符后也能立即匹配，比如 <code>/^A/</code> 匹配不了 "an A" 里面的 | ||
| "A"，但是可以匹配 "An A" 里面第一个 "A"。 | ||
| <a href="/zh-CN/docs/Web/JavaScript/Reference/Regular_expressions/Input_boundary_assertion"><strong>起始输入边界断言</strong></a>：匹配输入的起始。如果启用了 <a href="/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/RegExp/multiline"><code>multiline</code></a>（m）标志，则也会匹配换行符之后的字符。比如 <code>/^A/</code> 不匹配“an A”中的“A”，但是可以匹配“An A”中第一个“A”。 |
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btw，冒号是不是该被加粗？
<strong>Input boundary beginning assertion:</strong>
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后面完整翻译的时候再统一改吧，都可以的。个人感觉比较好的方式还是把冒号放外面。
| <a href="/zh-CN/docs/Web/JavaScript/Reference/Regular_expressions/Input_boundary_assertion"><strong>终止输入边界断言</strong></a>：匹配输入的结束。如果启用了 <a href="/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/RegExp/multiline"><code>multiline</code></a>（m）标志，则也会匹配换行符之后的字符。比如 <code>/t$/</code> 不匹配“eater”中的“t”，但是可以匹配“eat”中的“t”。 | ||
| </p> | ||
| </td> | ||
| </tr> |
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L84
若要匹配退格字符 (<code>[\b]</code>)，参见<a href="/zh-CN/docs/Web/JavaScript/Guide/Regular_expressions/Character_classes">字符类</a>格式问题
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以及L69改成“示例”吧，和别的地方统一起来
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yin1999
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Apr 10, 2026
| 匹配输入的开头。如果多行模式设为 true，<code>^</code> | ||
| 在换行符后也能立即匹配，比如 <code>/^A/</code> 匹配不了 "an A" 里面的 | ||
| "A"，但是可以匹配 "An A" 里面第一个 "A"。 | ||
| <a href="/zh-CN/docs/Web/JavaScript/Reference/Regular_expressions/Input_boundary_assertion"><strong>起始输入边界断言</strong></a>：匹配输入的起始。如果启用了 <a href="/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/RegExp/multiline"><code>multiline</code></a>（m）标志，则也会匹配换行符之后的字符。比如 <code>/^A/</code> 不匹配“an A”中的“A”，但是可以匹配“An A”中第一个“A”。 |
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后面完整翻译的时候再统一改吧，都可以的。个人感觉比较好的方式还是把冒号放外面。
files/zh-cn/web/javascript/guide/regular_expressions/assertions/index.md
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Co-authored-by: Hoarfroster <hoarfroster@outlook.com> Co-authored-by: A1lo <yin199909@aliyun.com>
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| ## 描述 | ||
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| `^` 断言当前位置是输入的开头，`$` 断言当前位置是输入的结尾。因为两者都是*断言*，它们不会消耗任何字符。 |
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[mdn-linter] reported by reviewdog 🐶
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| `^` 断言当前位置是输入的开头，`$` 断言当前位置是输入的结尾。因为两者都是*断言*，它们不会消耗任何字符。 | |
| `^` 断言当前位置是输入的开头，`$` 断言当前位置是输入的结尾。因为两者都是*断言*，它们不会消耗任何字符。 |
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| `^` 断言当前位置是输入的开头，`$` 断言当前位置是输入的结尾。因为两者都是*断言*，它们不会消耗任何字符。 | ||
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| 更准确地说，`^` 断言左侧的字符超出了字符串的范围；`$` 断言右侧的字符超出了字符串的范围。如果设置了 [`m`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/RegExp/multiline) 标志，则 `^` 也会匹配左侧字符是[行终止符](/zh-CN/docs/Web/JavaScript/Reference/Lexical_grammar#行终止符)的情况，`$` 同理也会匹配右侧字符是行结束符的情况。 |
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[mdn-linter] reported by reviewdog 🐶
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| 更准确地说，`^` 断言左侧的字符超出了字符串的范围；`$` 断言右侧的字符超出了字符串的范围。如果设置了 [`m`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/RegExp/multiline) 标志，则 `^` 也会匹配左侧字符是[行终止符](/zh-CN/docs/Web/JavaScript/Reference/Lexical_grammar#行终止符)的情况，`$` 同理也会匹配右侧字符是行结束符的情况。 | |
| 更准确地说，`^` 断言左侧的字符超出了字符串的范围；`$` 断言右侧的字符超出了字符串的范围。如果设置了 [`m`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/RegExp/multiline) 标志，则 `^` 也会匹配左侧字符是[行终止符](/zh-CN/docs/Web/JavaScript/Reference/Lexical_grammar#行终止符)的情况，`$` 同理也会匹配右侧字符是行结束符的情况。 |
| isValidIdentifier(" foo "); // false | ||
| ``` | ||
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| 该函数在进行代码生成（即使用代码生成代码）时非常有用，因为你可使用与其他字符串属性不同的合法标识符，如使用[点号表示法](/zh-CN/docs/Web/JavaScript/Reference/Operators/Property_accessors#点号表示法)代替[方括号表示法](/zh-CN/docs/Web/JavaScript/Reference/Operators/Property_accessors#方括号表示法)： |
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[mdn-linter] reported by reviewdog 🐶
Suggested change
| 该函数在进行代码生成（即使用代码生成代码）时非常有用，因为你可使用与其他字符串属性不同的合法标识符，如使用[点号表示法](/zh-CN/docs/Web/JavaScript/Reference/Operators/Property_accessors#点号表示法)代替[方括号表示法](/zh-CN/docs/Web/JavaScript/Reference/Operators/Property_accessors#方括号表示法)： | |
| 该函数在进行代码生成（即使用代码生成代码）时非常有用，因为你可使用与其他字符串属性不同的合法标识符，如使用[点号表示法](/zh-CN/docs/Web/JavaScript/Reference/Operators/Property_accessors#点号表示法)代替[方括号表示法](/zh-CN/docs/Web/JavaScript/Reference/Operators/Property_accessors#方括号表示法)： |
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part of #13254