feat: post props to loading Component

[warm-mechine-book]

I met a situation that the loading part could not met my need. The situation is like that:

const Loading = (props) => {
    if ( props.condition) {
        return <A {...props} />;
    } else {
        return <B {...props} />;
    }
}

Maybe leave a channel to post props is needed.

[EL-shadow]

@jamiebuilds what do you think about this? It would be great to merge it.

[M-OC]

+1 on this.

[fangyinghua]

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