```md
<!-- Button.stories.mdx -->

import { useState } from 'react';

import { Canvas, Meta, Story } from '@storybook/addon-docs';

import { Button } from './Button';

<Meta title="Button" component={Button} />

<Canvas>
  <Story name="Primary">
    {() => {
      const [value, setValue] = useState('Secondary');
      const [isPrimary, setIsPrimary] = useState(false);
      // Sets a click handler to change the label's value
      const handleOnChange = () => {
        if (!isPrimary) {
          setIsPrimary(true);
          setValue("Primary");
        }
      };
      return (
        <Button primary={isPrimary} onClick={handleOnChange} label={value} />
      );
    }}
  </Story>
</Canvas>
```