<div>
    <Affix offsetTop={this.state.top}>
            <Button
            type="primary"
            onClick={() => {
                    this.setState({
                    top: this.state.top + 10,
                });
            }}
            >
            Affix top
            </Button>
    </Affix>
    <br />
    <Affix offsetBottom={this.state.bottom}>
            <Button
            type="primary"
            onClick={() => {
                    this.setState({
                    bottom: this.state.bottom + 10,
                    });
                }}
            >
            Affix bottom
            </Button>
    </Affix>
</div>

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