在所有出现的字符串字符 javascript 中替换字符串

Question

我想找到所有\n和:的确切出现，并将其间的字符串替换为特定字符串。

例如，给定这个输入：

 Testing \n string of character \n June,23 2020: the task was completed. \n April,4 2020: All looks \n good

预期的结果是这样的：

 Testing \n string of character <br><b> June,23 2020</b><br> the task was completed. <br><b> April,4 2020</b></br> All looks \n good

 const text=`Testing \n string of character \n June,23 2020: the task was completed. \n April,4 2020: All looks \n good`; const newlineColonRegex = /(\n|:)/g const replaceWith = '<br><b>' const newString = text.replace(newlineColonRegex, replaceWith) console.log(newString)

Answer 1

您可以使用否定字符 class 排除两者的匹配。

\n([^\n:]+):

用。。。来代替

<br><br>$1<br><br>

正则表达式演示

 const regex = /\n([^\n:]+:)/g; const text = `Testing \n string of character \n June,23 2020: the task was completed. \n April,4 2020: All looks \n good`; const newlineColonRegex = /\n([^\n:]+):/g; const replaceWith = '<br><br>$1<br><br>' const newString = text.replace(newlineColonRegex, replaceWith) console.log(newString)

---

如果您还想从字符串的开头匹配它，您可以使用锚点而不是换行符^([^\n:]+:)并使用/gm标志