regex - JavaScript RegExp including flags in pattern -

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var str = 'test, string'; var regex = new regexp('^(.*)('+str+')(.*)$/i'); console.log(regex);

output

/^(.*)(test, string)(.*)$\/i/

but need following output:

/^(.*)(test, string)(.*)$\/i

the flags should second parameter regexp constructor.

new regexp('^(.*)(' + str + ')(.*)$', 'i');                                     ^ ^^^

the syntax of regexp constructor is

new regexp(pattern[, flags])


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