javascript - React: adding props to an existing component

Question

I'm trying to figure out how to clone an existing element with additional props.

For reference:

this.mainContent = <Hello message="Hello world!" />

I attempted to do something like

React.createElement(this.mainContent, Object.assign({}, 
   this.mainContent.props, { anotherMessage: "nice to meet ya!" }));

but it's not working.

How would I accomplish this?

Answer 1

You need to clone the element and add the additional props using React.cloneElement e.g:

var clonedElementWithMoreProps = React.cloneElement(
    this.mainContent, 
    { anotherMessage: "nice to meet ya!" }
);
// now render the new cloned element?