此正则表达式在 safari 上中断但在 Google Chrome 中有效，如何使其在两者中都有效

Question

我有一个正则表达式：

var regex = /(layout)(^|\s*)((?<!=)=(?!=))(^|\s*)/;

这适用于 Google Chrome 但不适用于 Safari 和 Internet Explorer。在 Safari 上，错误是：

"Invalid regular expression: invalid group specifier name"

请问我该如何解决这个问题？

更新我有一个 xml 输入，在将它提供给 xml 解析器之前，我对它进行了运行一些检查。其中一项检查是我使用字符串解析来提取包含文件名的布局名称。

我尝试识别 'layout' 属性上的空格并清理它，例如

<Container
width="match_parent"
height="wrap_content">

<include
width="20px"
height="30px"
layout  =   "subcontent.xml"
/>
</Container>

将更改为

<Container
width="match_parent"
height="wrap_content">

<include
width="20px"
height="30px"
layout="subcontent.xml"
/>

</Container>

我使用 String.replace 执行此操作，然后我提取包含的文件名并从存储中加载它，并将其排队等待解析。

这么想：

let check = 'layout=';

//change layout[space....]=[space.....] to layout=
let regex = /(layout)(^|\s*)((?<!=)=(?!=))(^|\s*)/;
xml = xml.replace(regex, check);

我希望现在更清楚了。

Answer 1

使用

let check = 'layout=';
let xml = "change layout    =   ";
let regex = /layout\s*=(?!=)\s*/g;
xml = xml.replace(regex, check);
console.log(xml)

见regex proof。

解释

"layout" - matches the characters layout literally (case sensitive)
"\s*" matches any whitespace character between zero and unlimited times, as many times as possible, giving back as needed (greedy)
"=" - matches the character = with index 6110 (3D16 or 758) literally
 - Negative Lookahead "(?!=)":
   Assert that the Regex below does not match
    "=" - matches the character = with index 6110 (3D16 or 758) literally
"\s*" - matches any whitespace character between zero and unlimited times, as many times as possible, giving back as needed (greedy)

此正则表达式在 safari 上中断但在 Google Chrome 中有效，如何使其在两者中都有效

This regular expression breaks on safari but works in Google Chrome, how do I make it work in both

javascript

regex

safari

google-chrome