regex - Javascript Regular expression (?i)^inf -

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I want to know what this regular expression is.

>

"Itemprop =" text ">

It is easy to find: type

Conclusion: This javascript has an invalid regular expression.

But I think that you saw this Rijks in the second language. If you want, the syntax is different: 

  / ^ inf / i   
 What does it mean: with a string  "inf Starting with ", , with case insensitive matching

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