这种正则表达在Safari上破裂，但在Google Chrome中起作用，我如何使其在这两个方面起作用

发布于 2025-01-22 08:20:48 字数 1104 浏览 4 评论 0原文

我有一条正则是：

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

这在Google Chrome上工作，但在Safari上不行，也不在Internet Explorer上使用。在Safari上，错误是：

“无效的正则表达式：无效的组规范名称”

我该如何解决此问题？

更新我有一个XML输入，然后在将其提供给XML解析器之前，在该输入上进行了一些检查。检查之一是我使用字符串解析来提取随附的文件名称上的布局名称。

我尝试在“布局”属性上识别空格，并清理它，例如，

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

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

将其更改为

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

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

</Container>

我使用字符串。重新定位，然后我提取随附的文件名并将其从存储中加载并排队以解析。

所以想一想：

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。

原文

I have a regex:

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

This works on Google Chrome but not on Safari and neither on Internet Explorer.
On Safari, the error is:

"Invalid regular expression: invalid group specifier name"

How can I fix this, please?

UPDATE
I have an xml input on which I run some checks before giving it to the xml parser. One of the checks is that I use string parsing to extract the layout name on included file names.

I try to identify whitespaces on the 'layout' attribute and clean it up e.g.

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

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

would be changed to

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

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

</Container>

I do this using a String.replace, then I extract the included file name and load it from storage and queue it for parsing also.

So think:

let check = 'layout=';

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

I hope its clearer now.

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哆啦不做梦 2025-01-29 08:20:48

使用

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

参见 Regex Prace 。

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)

Use

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

See regex proof.

EXPLANATION

"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)

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