Question

I just want to test the URL for a question mark ? however I keep getting an invalid quantifier error message…

alert(window.location.href.search('?'));

I then tried things like…

alert(window.location.href.search('\?'));

/

alert(window.location.href.search(\?));

…without any luck.

Answer 1

.search converts the argument to a RegExp./?/ is an invalid RegExp. The escape does not work either, because a single backslash in the string is not converted to a RegExp-escaping backslash.

Use indexOf instead:

location.href.indexOf('?') !== -1; // If true, then found