What is the best way to send props to a React component?

Sorry for the inconvenience of asking for help with finding an issue in my code, but I'm facing challenges while learning React.

I am attempting to pass a variable named hashRoute to a component in react. However, every time I try to access the prop using this.props.route within the component render method, I receive a browser warning that says:

"Warning: Unknown prop route on tag. Remove this prop from the element."

This is my Component:

var App = React.createClass({
    render: function(){
        var Child;
        switch(this.props.route)
        {
            case 'about':
                Child = about;
                break;
            default: 
                Child = Home;
                break;
        }

        return (
            <div>
                <Child/>
            </div>
        );
    }
});

Here is the calling function:

function render(){
    var hashRoute = window.location.hash.substr(1);
    ReactDOM.render(<app route = {hashRoute} />, document.getElementById('app'));
}

window.addEventListener('hashChange', render);

I must be making a mistake somewhere, but I am unsure what it is. I have also attempted to use the spread syntax (replacing

<app route = {hashRoute} />
with <app {...hashRoute} />), but then I receive another browser warning telling me that
React.__spread is deprecated and should not be used.

If you have any ideas, they would be greatly appreciated.

Answer №1

Did you know that React components have a unique requirement? The component name MUST always begin with an uppercase letter. This rule helps distinguish custom components from built-in HTML elements such as div, span, and others.

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