email-builder-js-main-2/test_sanitize.js at master · campiotto/email-builder-js-main-2 · GitHub

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const { JSDOM } = require('jsdom');
const dom = new JSDOM('<!DOCTYPE html><html><body></body></html>');
global.document = dom.window.document;

function sanitizeHtml(html) {
  const temp = document.createElement('div');
  temp.innerHTML = html;

  let hasContent = false;

  const processNode = (node) => {
    if (node.nodeType === 3) {
      let text = node.textContent || '';
      text = text.replace(/[\u00A0\s]+/g, ' ');
      if (text.trim()) hasContent = true;
      return text;
    }

    if (node.nodeType !== 1) return '';

    const tagName = node.tagName.toLowerCase();
    let childContent = '';
    node.childNodes.forEach(child => {
      childContent += processNode(child);
    });

    switch (tagName) {
      case 'br': return hasContent ? '<br>' : '';
      case 'div':
      case 'p':
        if (childContent.trim()) {
          if (hasContent) return '<br>' + childContent.trim();
          return childContent.trim();
        }
        if (childContent.includes('<br>') && hasContent) return '<br>';
        return '';
      default:
        return childContent;
    }
  };

  let result = '';
  temp.childNodes.forEach(child => {
    result += processNode(child);
  });

  return result
    .replace(/^(<br\s*\/?>)+/, '')
    .replace(/(<br\s*\/?>)+$/, '')
    .replace(/(<br\s*\/?>){2,}/g, '<br>')
    .trim();
}

const input1 = 'Olá amigos<div><br></div><div>Tudo joia?</div>';
console.log('Input:', JSON.stringify(input1));
console.log('Output:', sanitizeHtml(input1));