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<unless>
The <unless> structural component is the opposite of <if>. It takes a condition attribute, and renders the JSX that it contains if the condition is false, or no JSX if it's true.
Here's an example:
export default <div>
If you're happy and you know it
<unless condition={ false }>
clap you're hands
</unless>
</div>;
The <unless> component is often coupled with <else>.