javascript 如何忽略正则表达式中的换行符？
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How to ignore newline in regexp?
提问by Bdfy
How to ignore newline in regexp in Javascript ?
如何在 Javascript 中忽略正则表达式中的换行符？
for example:
例如：
data = "\
<test>11\n
1</test>\n\
#EXTM3U\n\
"
var reg = new RegExp( "\<" + "test" + "\>(.*?)\<\/" + "test" + "\>" )
var match = data.match(reg)
console.log(match[1])
result: undefined
结果：未定义
采纳答案by Samuel Liew
You are missing a JS newline character \at the end of line 2.
您\在第 2行的末尾缺少一个 JS 换行符。
Also, change regexp to:
另外，将正则表达式更改为：
var data = "\
<test>11\n\
1</test>\n\
#EXTM3U\n\
";
var reg = new RegExp(/<test>(.|\s)*<\/test>/);
var match = data.match(reg);
console.log(match[0]);
回答by t.niese
In JavaScript there is not flag to tell the RegExp that .also should match newlines. So you need to use a workaround e.g. [\s\S].
在 JavaScript 中，没有标志告诉 RegExp.也应该匹配换行符。所以你需要使用一种解决方法，例如[\s\S].
Your RegExp would then look this way:
然后您的 RegExp 将看起来像这样：
var reg = new RegExp( "\<" + "test" + "\>([\s\S]*?)\<\/" + "test" + "\>" );
回答by qur2
By reading this one: How to use JavaScript regex over multiple lines?
通过阅读这篇文章：如何在多行上使用 JavaScript 正则表达式？
I came with that, which works:
我带来了，它的工作原理：
var data = "<test>11\n1</test>\n#EXTM3U\n";
reg = /<test>([\s\S]*?)<\/test>/;
var match = data.match(reg);
console.log(match[1]);
Here is a fiddle: http://jsfiddle.net/Rpkj2/
这是一个小提琴：http: //jsfiddle.net/Rpkj2/
回答by Santosh Panda
Better you can use [\s\S]instead of . for multiline matching.
更好的是你可以使用[\s\S]而不是 . 用于多行匹配。
It is the most common JavaScript idiom for matching everything including newlines. It's easier on the eyes and much more efficient than an alternation-based approach like (.|\n).
它是最常见的 JavaScript 习惯用法，用于匹配包括换行在内的所有内容。与基于交替的方法（如(.|\n).
