ReactJS this.setState() out of sync with this.state.myvar

Question

In this ReactJS code in component I would expect this.setState( {b_MyPartyCat: value} ) to update this.state.b_MyPartyCat so the two console.log s

Answer 1

setState actually queues a state update. If you want to do something after it's actually executed, you can pass a callback as the second argument.

updatePartyCategory: function(value) {
    this.setState({b_MyPartyCat: value}, function(){
        console.log(this.state.value === value); // true
    }.bind(this));
},