no-multi-comp.md

Prevent multiple component definition per file (no-multi-comp)

Declaring only one component per file improves readability and reusability of components.

Rule Details

The following patterns are considered warnings:

var Hello = React.createClass({
  render: function() {
    return <div>Hello {this.props.name}</div>;
  }
});

var HelloJohn = React.createClass({
  render: function() {
    return <Hello name="John" />;
  }
});

The following patterns are not considered warnings:

var Hello = require('./components/Hello');

var HelloJohn = React.createClass({
  render: function() {
    return <Hello name="John" />;
  }
});

Rule Options

...
"no-multi-comp": [<enabled>, { "ignoreStateless": <boolean> }]
...

ignoreStateless

When true the rule will ignore stateless components and will allow you to have multiple stateless components, or one statefull component and some stateless components in the same file.

The following patterns are considered okay and do not cause warnings:

function Hello(props) {
  return <div>Hello {props.name}</div>;
}
function HelloAgain(props) {
  return <div>Hello again {props.name}</div>;
}

function Hello(props) {
  return <div>Hello {props.name}</div>;
}
class HelloJohn extends React.Component {
  render() {
    return <Hello name="John" />;
  }
}
module.exports = HelloJohn;

When Not To Use It

If you prefer to declare multiple components per files you can disable this rule.