React: this is null in event handler

Question

I have a LoginForm component. I want to check before submit, that both loginName and password is set. I tried with this code (a lot of stuff omitte

Answer 1

For those who is using Babel, you can use bind operator with transform-function-bind plugin:

onSubmit={::this.submit}

which is a syntactic sugar for:

onSubmit={this.submit.bind(this)}