React: onClick on button not working

Question

For the past hour, I have been trying to get this to work. onClick on any of the buttons is not working at all… What am I doing wrong?

const React = require('react');

class Questionnaire extends React.Component {
constructor (props) {
    super(props);
    this.state = { selectedSection: 0 };
}

selectSection (e) {
    console.log(e);
}

render () {
    return (
        <div>
            <div className='btn-group mr-2' role='group'>
                <button className='btn btn-primary' onClick={this.selectSection}>A</button>
                <button className='btn btn-secondary' onClick={this.selectSection}>B</button>
                <button className='btn btn-secondary' onClick={this.selectSection}>C</button>
                <button className='btn btn-secondary' onClick={this.selectSection}>D</button>
          </div>
        </div>
    );
}
}

 module.exports = Questionnaire;

I should mention that I am using it with express-react-views

The code seems to be working fine for me. Nothing's showing up on your end? — Iruss
– Iruss, Commented Aug 14, 2017 at 16:54
From express-react-views readme: "It renders static markup and does not support mounting those views on the client." github.com/reactjs/express-react-views/issues/59 — CD..
– CD.., Commented Aug 14, 2017 at 16:58

wnamen · Accepted Answer · 2017-08-14 19:56:50Z

1

You need to bind the function to the component like so:

class Questionnaire extends React.Component {
    constructor (props) {
        super(props);
        this.state = { selectedSection: 0 };

        this.selectSection = this.selectSection.bind(this)
    }

Keep everything else the same

answered Aug 14, 2017 at 19:56

wnamen

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Comments

Rahul Kant · Accepted Answer · 2017-08-14 17:27:54Z

0

Try This

    const React = require('react');

    class Questionnaire extends React.Component {
    constructor (props) {
        super(props);
        this.state = { selectedSection: 0 };
    }

    selectSection = function(e){
    console.log(e);
  }

    render () {
        return (
            <div>
                <div className='btn-group mr-2' role='group'>
                    <button className='btn btn-primary' onClick={this.selectSection}>A</button>
                    <button className='btn btn-secondary' onClick={this.selectSection}>B</button>
                    <button className='btn btn-secondary' onClick={this.selectSection}>C</button>
                    <button className='btn btn-secondary' onClick={this.selectSection}>D</button>
              </div>
            </div>
        );
    }
    }

answered Aug 14, 2017 at 17:27

Rahul Kant

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1 Comment

Navarjun Over a year ago

What's the difference?

Richard Lucas · Accepted Answer · 2017-08-15 13:42:24Z

0

You need to bind the method to the class. Add this line to the constructor:

this.selectSection = this.selectSection.bind(this);

answered Aug 15, 2017 at 13:42

Richard Lucas

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