How to add string object's value into JS regular expression?

Question

var foo = "blaa";
var regex = /foo/i;

results in /foo/i instead of /blaa/i.

Christian C. Salvadó · Accepted Answer · 2010-08-05 00:20:40Z

6

You can use the RegExp constructor:

var regex = new RegExp(foo, 'i');

It takes two arguments, the first expect a string that represents the regular expression pattern and in the second optional argument you can define the regular expression flags you want.

answered Aug 5, 2010 at 0:20

Christian C. Salvadó

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