Repository: react
Issue: [React 19] Different behaviors with `preload` method
Labels: Type: Discussion,React 19

## Summary

- react & react-dom version: `19.0.0-rc-3563387fe3-20240621`
- node version: `20.14.0`

When using react's preload method, the preload link tag is not created in certain cases.
It works correctly with two link tags (`OnlyLinkTags` component).

### Code example

```js
const fs = require('node:fs');
const { createElement } = require('react');
const { preload, preinit } = require('react-dom');
const { renderToString } = require('react-dom/server');

const CSS = '/some.css';
const LINK_PROPS = {
  rel: 'stylesheet',
  href: CSS,
};

/**
 * Doesn't create the preload link tag
 */
const PreloadAndPreinit = () => {
  preload(CSS, { as: 'style' });
  preinit(CSS, { as: 'style' });

  return null;
};

/**
 * Doesn't create the preload link tag
 */
const PreloadAndLinkWithPrecedence = () => {
  preload(CSS, { as: 'style' });

  return createElement('link', { ...LINK_PROPS, precedence: 'custom' });
};

/**
 * Creates the preload link tag correctly into the head
 * The stylesheet link tag stays in the body, because it doesn't have precedence
 */
const PreloadAndLinkWithoutPrecedence = () => {
  preload(CSS, { as: 'style' });

  return createElement('link', LINK_PROPS);
};

/**
 * Moves both tags into the head
 */
const OnlyLinkTags = () => [
  createElement('link', {
    key: 'preload',
    rel: 'preload',
    as: 'style',
    href: CSS,
  }),
  createElement('link', { ...LINK_PROPS, key: 'link', precedence: 'custom' }),
];

[
  PreloadAndPreinit,
  PreloadAndLinkWithPrecedence,
  PreloadAndLinkWithoutPrecedence,
  OnlyLinkTags,
].forEach((Component) => {
  fs.writeFileSync(
    `_${Component.name}.html`,
    renderToString(
      createElement(
        'html',
        null,
        createElement('head'),
        createElement('body', null, createElement(Component)),
      ),
    ),
  );
});
```

### Outputs:

#### PreloadAndPreinit:

```jsx
preload("/some.css", { as: 'style' });
preinit("/some.css", { as: 'style' });
```

**Current:**
```html
<html>
  <head>
    <link rel="stylesheet" href="/some.css" data-precedence="default" />
  </head>
  <body></body>
</html>
```

**Expected:**
```html
<html>
  <head>
    <link rel="stylesheet" href="/some.css" data-precedence="default" />
    <link rel="preload" as="style" href="/some.css" />
  </head>
  <body></body>
</html>
```

#### PreloadAndLinkWithPrecedence:

```jsx
preload("/some.css", { as: 'style' });

<link rel="stylesheet" href="/some.css" precedence="custom" />
```

**Current:**
```html
<html>
  <head>
    <link rel="stylesheet" href="/some.css" data-precedence="custom" />
  </head>
  <body></body>
</html>
```

**Expected:**
```html
<html>
  <head>
    <link rel="stylesheet" href="/some.css" data-precedence="default" />
    <link rel="preload" as="style" href="/some.css" />
  </head>
  <body></body>
</html>
```

#### PreloadAndLinkWithoutPrecedence:

```jsx
preload("/some.css", { as: 'style' });

<link rel="stylesheet" href="/some.css" />
```


**Current:**
```html
<html>
  <head>
    <link rel="preload" href="/some.css" as="style" />
  </head>
  <body>
    <link rel="stylesheet" href="/some.css" />
  </body>
</html>
```

**Expected:**

`The same as current.`

#### OnlyLinkTags:

```jsx

<link rel="preload" as="style" href="/some.css" />
<link rel="stylesheet" href="/some.css" />
```

**Current:**
```html
<html>
  <head>
    <link rel="stylesheet" href="/some.css" data-precedence="custom" />
    <link rel="preload" as="style" href="/some.css" />
  </head>
  <body></body>
</html>
```

**Expected:**

`The same as current.`