React Default props

defaultProps allows you to set default, or fallback, values for your component props. defaultProps are useful when you call components from different views with fixed props, but in some views you need to pass different value.

Syntax

ES5

var MyClass = React.createClass({
 getDefaultProps: function() {
 return {
 randomObject: {},
...
 };
 }
}

ES6

class MyClass extends React.Component {...}
MyClass.defaultProps = {
 randomObject: {},
 ...
}

ES7

class MyClass extends React.Component {
 static defaultProps = {
 randomObject: {},
 ...
 };
}

The result of getDefaultProps() or defaultProps will be cached and used to ensure that this.props.randomObject will have a value if it was not specified by the parent component.

Conclusion

In this page (written and validated by A. Gawali) you learned about React Default props . What's Next? If you are interested in completing React tutorial, your next topic will be learning about: React Prop Types.

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