State not set on button press 1st time

Question

Else if Condition not give response on 1st click button, it always give response 2nd click on button. I'm trying get date diff between two date , minimum date to maximum date.

Date came every click according to selected date, but maxDate & minDate not set in state.

After 2nd click first date set in minDate, 3rd click set 2nd date as maxDate. But i want set date as well as click on button.

this.onDayPress = this.selecionarData.bind(this);

selecionarData(date){
let {year, month, day} = date;
 if (this.state.minDate && this.state.maxDate) {
      if (this.state.minDate > day) {
        this.setState({
          minDate: day
        });
      } else {
        this.setState({
          maxDate: day
        });
      }
    } else if (this.state.minDate && this.state.maxDate === undefined) {
      if (this.state.minDate > day) {
        this.setState({
          minDate: day,
          maxDate: this.state.minDate
        });
      } else {
        this.setState({
          maxDate: day
        })
      }
    } else {
      this.setState({
        minDate: day
      });
    }

Answer 1

Make sure you set the initial state for minDate and maxDate .

See here for documentation: https://facebook.github.io/react/docs/react-component.html#setstate

Answer 2

Thank you so much to giving idea. Actually it's work link this in my case :

   if (this.state.minDate > day) {
         this.setState({
             minDate: day
          },() =>{this.methodCall()});
        } else {
          this.setState({
             maxDate: day
          },() =>{this.methodCall()});
       }
   }