storybook/docs/snippets/svelte/component-story-custom-args-complex.js.mdx

```js
// YourComponent.stories.js

import YourComponent from './YourComponent.svelte';

export default {
  /* 👇 The title prop is optional.
   * See https://storybook.js.org/docs/7.0/svelte/configure/overview#configure-story-loading
   * to learn how to generate automatic titles
   */
  title: 'YourComponent',
  component: YourComponent,
  //👇 Creates specific argTypes
  argTypes: {
    propertyA: {
      options: ['Item One', 'Item Two', 'Item Three'],
      control: { type: 'select' }, // Automatically inferred when 'options' is defined
    },
    propertyB: {
      options: ['Another Item One', 'Another Item Two', 'Another Item Three'],
    },
  },
};

//👇 Some function to demonstrate the behavior
const someFunction = (valuePropertyA, valuePropertyB) => {
  // Makes some computations and returns something
};

/*
 *👇 Render functions are a framework specific feature to allow you control on how the component renders.
 * See https://storybook.js.org/docs/7.0/svelte/api/csf
 * to learn how to use render functions.
 */
export const ExampleStory = {
  render: ({ propertyA, propertyB }) => {
    //👇 Assigns the function result to a variable
    const someFunctionResult = someFunction(propertyA, propertyB);
    return {
      Component: YourComponent,
      props: {
        ...args,
        someProperty: someFunctionResult,
      },
    };
  },
  args: {
    propertyA: 'Item One',
    propertyB: 'Another Item One',
  },
};
```