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How to convert finished html to html inline styled fragment #248

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rhwoodpecker opened this issue Jul 10, 2023 · 1 comment
Open

How to convert finished html to html inline styled fragment #248

rhwoodpecker opened this issue Jul 10, 2023 · 1 comment

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@rhwoodpecker
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like：

  <html> 
     <style>p { width: 20px;} </style>
     <body>
        <p>hhhh</p>
     </body>
  </html>

got:
<p style="width: 20px">hhh</p>
@kinee1
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kinee1 commented Apr 29, 2024

To convert a finished HTML document with external CSS styles into an HTML fragment with inline styles applied directly to the elements, you'll need to:

Extract the CSS styles from the <style> tag and apply these styles directly to the corresponding HTML elements.
Here's a basic approach using JavaScript to achieve this:

let originalHTML = `
  <html> 
     <style>p { width: 20px;} </style>
     <body>
        <p>hhhh</p>
     </body>
  </html>
`;

// Parse the HTML string into a DOM object
let doc = new DOMParser().parseFromString(originalHTML, 'text/html');

// Extract and apply CSS styles inline
let styleTags = doc.querySelectorAll('style');
styleTags.forEach(styleTag => {
    let style = styleTag.textContent.trim();
    let elementsWithStyles = doc.querySelectorAll(styleTag.getAttribute('type') || 'style');
    elementsWithStyles.forEach(el => {
        el.removeAttribute('style'); // Remove existing inline styles
        el.setAttribute('style', style); // Apply inline styles from external CSS
    });
    styleTag.remove(); // Remove the <style> tag
});

// Convert the modified DOM back to an HTML string
let modifiedHTML = doc.documentElement.outerHTML;
console.log(modifiedHTML);

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@rhwoodpecker @kinee1