[
  {
    "messages": [
      {
        "type": "error",
        "lastLine": 8,
        "lastColumn": 16,
        "firstColumn": 5,
        "message": "Bad value “” for attribute “src” on element “img”: Must be non-empty.",
        "extract": "body>\n    <img src=\"\">\n  </b",
        "hiliteStart": 10,
        "hiliteLength": 12
      },
      {
        "type": "error",
        "lastLine": 8,
        "lastColumn": 16,
        "firstColumn": 5,
        "message": "An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.",
        "extract": "body>\n    <img src=\"\">\n  </b",
        "hiliteStart": 10,
        "hiliteLength": 12
      }
    ],
    "path": "input.html"
  }
]