Code Generator

Here's a JavaScript function that removes all CSS from the beginning of a string:

/// javascript
function removeCSSFromStart(input) {
  // Regular expression to match CSS content
  const cssRegex = /^\s*<style[^>]*>[\s\S]*?<\/style>\s*/i;
  
  // Remove CSS from the start of the string
  return input.replace(cssRegex, '');
}
/// 

This function does the following:

1. We define a regular expression `cssRegex` that matches CSS content at the beginning of the string:
   - `^\s*`: Matches any whitespace at the start of the string.
   - `<style[^>]*>`: Matches the opening `<style>` tag, including any attributes.
   - `[\s\S]*?`: Matches any content (including newlines) non-greedily.
   - `<\/style>`: Matches the closing `</style>` tag.
   - `\s*`: Matches any trailing whitespace.
   - The `i` flag makes the regex case-insensitive.

2. We use the `replace()` method to remove the matched CSS content from the start of the input string.

3. The function returns the modified string with the CSS removed from the beginning.

You can use this function like this:

/// javascript
const input = `
<style>
  body { font-family: Arial, sans-serif; }
  .container { max-width: 800px; margin: 0 auto; }
</style>
<div class="container">
  <h1>Hello, World!</h1>
  <p>This is some content.</p>
</div>
`;

const result = removeCSSFromStart(input);
console.log(result);
/// 

This will output:

/// 
<div class="container">
  <h1>Hello, World!</h1>
  <p>This is some content.</p>
</div>
/// 

The CSS at the beginning of the string has been removed.

Note that this function only removes CSS from the start of the string. If there's CSS elsewhere in the string, it won't be affected. If you need to remove all CSS from anywhere in the string, you'd need to modify the regular expression to match globally.