JavaScript RegExp ? Quantifier
 JavaSript RegExp Object
Definition and Usage
The n? quantifier matches any string that contains zero or one occurrences of n.
Syntax
new RegExp("n?")
or simply:
/n?/ |
Example
Example
Do a global search for a "1",
followed by zero or one "0" characters:
var str="1, 100 or 1000?";
var patt1=/10?/g;
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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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