JavaScript Test RegExp function non-latin characters bug

Question

Well, I have noticed this during using console.

> var a = new RegExp('\\b' + "абв" + '\\b', "gim");
> a.test("абв");
false

> var b = new RegExp("абв", "gim");
> b.test("абв");
true

And then with latin characters:

> var c = new RegExp('\\b' + "abc" + '\\b', "gim");
> c.test("abc");
true

I would glad to read your suggestions about fixing this.

Answer 1

\\b refers only to word boundaries in an ASCII perception. You can create DIY boundaries. Also if you already know the pattern will remain constant, use a regular expression literal as follows:

/(^| )абв( |$)/.test("абв"); // true