markuplint preset

.markuplintrc.json

{
  "excludeFiles": ["**/node_modules/**/*"],
  "rules": {
    "attr-duplication": true,
    "character-reference": true,
    "class-naming": "/[a-z]+(__[a-z]+)?/",
    "deprecated-attr": true,
    "deprecated-element": true,
    "disallowed-element": true,
    "doctype": true,
    "id-duplication": true,
    "ineffective-attr": true,
    "invalid-attr": {
      "option": {
        "attrs": {
          "href": {
            "pattern": "/^(https?://|/)/"
          },
          "src": {
            "pattern": "/^(https?://|/)/"
          }
        }
      }
    },
    "landmark-roles": true,
    "no-refer-to-non-existent-id": true,
    "permitted-contents": true,
    "required-attr": true,
    "required-element": true,
    "wai-aria": true
  },
  "nodeRules": [
    {
      "tagName": "img",
      "rules": {
        "required-attr": ["width", "height", {
          "name": "src",
          "value": "/.(jpe?g|png|svg|webp)$/"
        }]
      }
    }
  ]
}