When composing your regular expression search pattern, you created a pattern element with an illegal repetition factor. For example, the pattern
|   |  Copy Code |
|---|---|
/^+/ | |
is illegal because the element ^ (beginning of input) cannot have a repetition factor. The following table lists the elements that cannot have repetition factors.
| Element | Description |
|---|---|
|
^ |
Beginning of input |
|
$ |
End of input |
|
\b |
Word boundary |
|
\B |
Non-word boundary |
|
* |
Zero or more repetitions |
|
+ |
One or more repetitions |
|
? |
Zero or one repetitions |
|
{n} |
n repetitions |
|
{n,} |
n or more repetitions |
|
{n,m} |
From n to m repetitions, inclusive |
To correct this error
-
Ensure your search pattern element contains legal repetition factors only.
See Also
