Vue.js version

1.0.21

Reproduction Link

http://www.webpackbin.com/4kszqXok-

Steps to reproduce

Try to bind multiple classes like this :class="['class-1 class-2', { 'class-3': true }]"

What is Expected?

Be be able to bind classes like I described above.

What is actually happening?

Getting console error:

Uncaught InvalidCharacterError: Failed to execute 'add' on 'DOMTokenList': The token provided ('color-green text-uppercase') contains HTML space characters, which are not valid in tokens

Is this bug or am i doing it right wrong?