CodePudding user response：

You can choose multiple files with your JSON Schema:

{
  "title": "Files",
  "type": "object",
  "properties": {
    "files": {
      "type": "array",
      "title": "Multiple files",
      "items": {
        "type": "string",
        "format": "data-url"
      }
    },
  }
}

First, click on "Choose Files":

Second, hold "Ctrl" or "Shift", then, choose multiple files. *Don't release "Ctrl" or "Shift" until you finish choosing them. In the example below, I choose "clover.jpg", "rosemary.jpg" and "sunflower.jpg":

Finally, You can choose 3 files as listed under "Choose Files":

CodePudding user response：

There is another way to choose multiple files with this JSON Schema:

{
  "title": "Files",
  "type": "object",
  "properties": {
    "files": {
      "type": "array",
      "title": "Multiple files",
      "items": {
        "properties": {
          "file": {
            "type": "string",
            "title": "File",
            "format": "data-url",
          }
        }
      }
    }
  }
}

Click on "＋" to add single file input and "