How to use comments in React

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Within the render method comments are allowed, but in order to use them within JSX, you have to wrap them in braces and use multi-line style comments.

<div className="dropdown">
    {/* whenClicked is a property not an event, per se. */}
    <Button whenClicked={this.handleClick} className="btn-default" title={this.props.title} subTitleClassName="caret"></Button>
    <UnorderedList />
</div>

You can read more about how comments work in JSX here.

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