I am trying to make a regex call with the following string:
if ((/&timeout=true|?scn=header/i).test(url))
... and the statement continues. I am receiving this error in the console:
Uncaught SyntaxError: Invalid regular expression:
/&timeout=true|?scn=header/
: Nothing to repeat
How do I properly make this statement?
您必须转义问号字符,因为它是正则表达式运算符:
if ((/&timeout=true|\?scn=header/i).test(url))
The problem is that ?
has a special meaning of repeat zero or one times , hence the error. Just escape it:
/&timeout=true|\?scn=header/
Try /(&timeout=true|\\?scn=header)/i
? is a special character in regex so you need to escape it
Demo: http://www.regexr.com/3bqlu
Try this:
/[&\\?]timeout=true|[&\\?]scn=header/
It matches both
http://example.com/file.html?scn=header&timeout=true
http://example.com/file.html?timeout=true&scn=header
because we don't know which parameter comes first
这似乎有效
/\\&timeout=true|\\/?scn=header/i
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