javascript - Regular expression for y,yes, Y, YES ,1 -

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i need write regex validating string. regular expression should pass string if contains of following: y, y, yes, yes, 1. letters can in case. new regular expression , javascript.

you need add optional group case-insensitive i modifier.

/y(?:es)?|1/i.test(str)

or

/[1y](?:es)?/i.test(str)

or

/[y1]/i.test(str)

for doing exact match.

/^(?:y(?:es)?|1)$/i.test(str)

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