JavaScript RegExp ?! Quantifier
 JavaSript RegExp Object
Definition and Usage
The ?!n quantifier matches any string that is not followed by a specific string n.
Syntax
new RegExp("regexp(?!n)")
or
/regexp(?!n)/
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Example
Example
Do a global, case insensitive search for "is"
not followed by " all":
var str="Is this all there is";
var patt1=/is(?! all)/gi; |
The marked text below shows where the expression gets a match:
Try it yourself »
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JavaSript RegExp Object
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