YouTipJsref Regexp Nfollow Not
# JavaScript RegExp ?! Quantifier
[ JavaScript RegExp Object](#)
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## Definition and Usage
The ?!_n_ quantifier matches any string that is not followed by the specified string _n_.
## Syntax
new RegExp("_regexp_(?!_n)_")
or
/_regexp_(?!_n)_/
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## Browser Support
The ?! quantifier is supported in all major browsers.
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## Example
## Example
Perform a global search for "is" that is not followed by "all":
var str="Is this all there is";
var patt1=/is(?! all)/gi;
The text marked below shows where the expression gets a match:
Is this all there is
[Try it yourself »](#)
* * JavaScript RegExp Object](#)