TypeError: expect(…).to.be is not a function

Question

I am configuring my Karma amd mocha framework with grunt in my project. When I am running karma start I am getting below-mentioned error.

I am getting this error in

Answer 1

You need to write expect(true).to.be.equal(true) the be is a chain (object) not a function. Or you could write:

expect(true).to.be.true;
expect(false).to.be.false;