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RegExp ? Quantifier

Do a global search for a "1", followed by zero or one "0" characters

Browser Support

/n?/ is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:

Chrome IE Edge Firefox Safari Opera
Yes Yes Yes Yes Yes Yes

Syntax

new RegExp("n?")

or simply:

/n?/

Syntax with modifiers

new RegExp("n?", "g")

or simply:

/n?/g

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