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react-children-clone-with-props

v0.2.0

Published

Shorthand to clone React child components with new props added.

Downloads

6

Readme

Build Status NPM Package Dependency status devDependency status

react-children-clone-with-props

Shorthand to clone React child components with new props added, with the type of the children intact.

Preliminaries

If you simply React.Chlidren.map the children and clone the childs regardlessly as below, the type of the children may change.

var newChildren = React.Children.map(
    this.props.children,
    child => React.cloneElement( child, {
        propA: valueA,
        propB: valueB
    })
);

Namely, when this.props.children is a single React element, you will have newChildren as an array since React.Children.map turns a single React element into an array. Sometimes you may need the type remain intact, and you want to save the job checking against the types and returning respectively.

Install

npm install react-children-clone-with-props

Usage

// CommonJS
var ReactChildrenCloneWithProps = require( 'react-children-clone-with-props' );
// AMD
import ReactChildrenCloneWithProps from 'react-children-clone-with-props';

render() {
    var newChildren = ReactChildrenCloneWithProps( children, {
        propA: valueA,
        propB: valueB
    });

    return <div>{ newChildren }</div>;
}

If props.children is a single React element, this utility function returns a single React element. If props.children is an array of React elements, it returns an array. If there is no children, i.e. with props.children being null, it returns null. The type remains intact.

Test

npm test

License

MIT. See LICENSE.md for details.