Expresiones regulares para adaptar snippets a React

settings.json

{
  "replace-on-save": {
    "enabled": true,
    "replacements": [
      {
        "languageIdentifiers": ["javascriptreact", "jsx"],
        "rules": [
          {
            "search": "class=\"",
            "replace": "className=\""
          },
          {
            "search": "(?<=(<.*[class|className]=\"))([\\s]+)(?=([\\S\\s]{1,})?\".*>)",
            "replace": ""
          },
          {
            "search": "(?<=(<.*[class|className]=\"([\\S\\s]{1,})?))([\\s]+)(?=\".*>)",
            "replace": ""
          }
        ]
      }
    ]
  }
}