Based on this documentation, there is a common layoutProperties field available to the manifest.

I can define primary and secondary colors using it.

However if I add it to my Gmail add-on manifest, like this:

{
  "dependencies": {},
  "gmail": {
    "name": "My Add-on",
    "layoutProperties": {
      "primaryColor": "#367c1a",
      "secondaryColor": "#367c1a"
    }
}

I get this error when saving the manifest:

"appsscript.json" has errors: Invalid manifest: unknown fields: [gmail.layoutProperties]

Am I doing something wrong? According to the documentation it's a common field and if I understand correctly, it should also apply to Gmail add-ons.

Btw I also tried putting it outside gmail data, with the same error when saving.

Thanks in advance.

CodePudding user response：

As you pointed out, the layoutProperties field is part of the Common object, not the Gmail one

So your manifest needs to look like this:

{
  "dependencies": {},
    "addOns": {
      "common": {
        ...,
        "layoutProperties": {
          "primaryColor": "#367c1a",
            "secondaryColor": "#367c1a"
        }
      },
        "gmail": {
          ...
        }
    }
}